FILE NO. 333-26607
40 ACT FILE NO. 811-2271

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
AMENDMENT NO. 1
TO
FORM S-6

For Registration under the Securities Act of 1933 of Securities of Unit
Investment Trusts Registered on
Form N-8B-2

A.  Exact name of Trust: NUVEEN TAX-FREE UNIT TRUST, SERIES 943
B.  Name of Depositor:  JOHN NUVEEN & CO. INCORPORATED

C.  Complete address of Depositor's principal executive offices:

                        333 West Wacker Drive
                        Chicago, Illinois 60606

D.  Name and complete address of agents for service:

                        JOHN NUVEEN & CO. INCORPORATED
                        Attn: Gifford R. Zimmerman
                        333 West Wacker Drive
                        Chicago, Illinois 60606

                        CHAPMAN AND CUTLER
                        Attn: Eric F. Fess
                        111 West Monroe Street
                        Chicago, Illinois 60603

It is proposed that this filing will become effective (check appropriate box)

/ / immediately upon filing pursuant to paragraph (b)

/ / on May 30, 1997 pursuant to paragraph (b)
/ / 60 days after filing pursuant to paragraph (a)

/ / on May 30, 1997 pursuant to paragraph (a) of rule 485 or 486
E.  Title and amount of  securities being registered: An  indefinite number of Units  as
    permitted by Rule 24f-2.

F.  Proposed  maximum offering price  to the public of  the securities being registered:
    Not presently determinable.

G.  Amount of filing fee: $0.

H.  Approximate date of proposed sale  to the public: As  soon as practicable after  the
    effective date of the Registration Statement.

/X/ Check  box if it is proposed that this  filing will become effective on May 30, 1997
    at 1:30 P.M. pursuant to Rule 487.


NUVEEN TAX-FREE UNIT TRUST, SERIES 943

CROSS-REFERENCE SHEET

PURSUANT TO RULE 404(C) OF REGULATION C
UNDER THE SECURITIES ACT OF 1933

(FORM N-8B-2 ITEMS REQUIRED BY INSTRUCTION 1 AS
TO PROSPECTUS ON FORM S-6)

FORM N-8B-2                                                FORM S-6
ITEM NUMBER                                                HEADING IN PROSPECTUS

          I. ORGANIZATION AND GENERAL INFORMATION
 1.  (a)  Name of trust                                 )  Prospectus Part A -- Cover Page
     (b)  Title of securities issued                    )
 2.  Name and address of Depositor                      )  Information About the Sponsor
 3.  Name and address of Trustee                        )  Information About the Trustee
 4.  Name and address of principal Underwriter          )  Information About the Sponsor
 5.  Organization of trust                              )  What Is The Nuveen Tax-Free Unit Trust?
 6.  Execution and termination of Trust Agreement       )  What Is The Nuveen Tax-Free Unit Trust?
                                                        )  Information About The Trustee
                                                        )  Other Information
 7.  Changes of Name                                    )  *
 8.  Fiscal Year                                        )
 9.  Litigation                                         )

          II. GENERAL DESCRIPTION OF THE TRUST AND SECURITIES OF THE TRUST
10.  General Information regarding trust's securities   )  Summary of Portfolios
                                                        )  Why and How are the Bonds Insured?
                                                        )  When Are Distributions Made to Unitholders?
                                                        )  Ownership and Transfer of Units
                                                        )  How Units May Be Redeemed Without Charge?
                                                        )  How Bonds May Be Removed From The Trusts?
                                                        )  Information About the Trustee
                                                        )  Information About the Sponsor
                                                        )  Other Information
                                                        )  What Is The Tax Status of Unitholders?
11.  Type of securities comprising units                )  What Is The Nuveen Tax-Free Unit Trust?
                                                        )  Summary of Portfolios
                                                        )  Composition of Trusts
                                                        )  What Are The Objectives Of The Trusts?
                                                        )  Why and How are the Bonds Insured?
12.  Certain information regarding                      )  *
     periodic payment certificates                      )
13.  (a)  Load, fees, expenses, etc.                    )  Part A -- Essential Information
                                                        )  How Is The Public Offering Price Determined?
                                                        )  Market For Units
                                                        )  What Is Accrued Interest?
                                                        )  What Are Estimated Long Term Return
                                                        )  And Estimated Current Return?
                                                        )  How Was The Price Of The Bonds
                                                        )  Determined At The Date of Deposit?
                                                        )  What Are Normal Trust Operating Expenses?
                                                        )  When Are Distributions Made To Unitholders?
                                                        )  Summary Of Portfolios
                                                        )  How Detailed Are Reports To Unitholders?


     (b)  Certain information regarding                 )  *
          periodic payment certificates                 )
     (c)  Certain percentages                           )  How Is The Public Offering Price Determined?
                                                        )  Market For Units
                                                        )  What Are Estimated Long Term Return
                                                        )  And Estimated Current Return?
                                                        )  How Was The Price Of The Bonds
                                                        )  Determined At The Date Of Deposit?
                                                        )  What Is Accrued Interest?
     (d)  Certain other fees, etc. payable by holders   )  How Was The Price Of The Bonds Determined
                                                        )  At The Date Of Deposit?
                                                        )  What Are Normal Trust Operating Expenses?
                                                        )  Ownership And Transfer Of Units
     (e)  Certain profits receivable by depositor,      )  Composition Of Trusts
          principal underwriter, trustee or             )
          affiliated persons                            )
                                                        )  How Units May Be Purchased By The Sponsor

     (f)  Ratio of annual charges to income             )  *
14.  Issuance of trust's securities                     )  Summary of Portfolios
                                                        )  When Are Distributions Made To Unitholders?
                                                        )  Ownership and Transfer of Units
                                                        )  How Units May Be Redeemed Without Charge
15.  Receipt and handling of payments                   )  *
     from purchasers                                    )
16.  Acquisition and Disposition of                     )  What Is The Nuveen Tax-Free Unit Trust?
     Underlying Securities                              )
                                                        )  Summary of Portfolios
                                                        )  Composition of Trusts
                                                        )  Why and How are the Bonds Insured?
                                                        )  How Units May Be Redeemed Without Charge
                                                        )  How Bonds May Be Removed From The Trusts
                                                        )  Other Information
17.  Withdrawal or redemption                           )  Market For Units
                                                        )  How Units May Be Redeemed Without Charge
                                                        )  How Units May Be Purchased By The Sponsor
18.  (a)  Receipt and disposition of income             )  Summary of Portfolios
                                                        )  When Are Distributions Made To Unitholders?
                                                        )  How Detailed Are Reports To Unitholders?
     (b)  Reinvestment of distributions                 )  Accumulation Plan
     (c)  Reserves or special funds                     )  Summary of Portfolios
                                                        )  When Are Distributions Made To Unitholders?
     (d)  Schedule of distributions                     )  *
19.  Records, accounts and reports                      )  When Are Distributions Made To Unitholders?
                                                        )  How Detailed Are Reports To Unitholders?
20.  Certain miscellaneous provisions of                )  Information About the Trustee
     Trust Agreement                                    )
                                                        )  Information About the Sponsor
                                                        )  Other Information
21.  Loans to security holders                          )  *
22.  Limitations on liability                           )  Summary of Portfolios
                                                        )  Composition of Trusts
                                                        )  Information About The Trustee
23.  Bond arrangements                                  )  *


24.  Other material provisions of Trust Agreement.      )  *

          III. ORGANIZATION, PERSONNEL AND AFFILIATED PERSONS OF DEPOSITOR
25.  Organization of Depositor                          )  Information About the Sponsor
26.  Fees received by Depositor                         )  *
27.  Business of Depositor                              )  Information About the Sponsor
28.  Certain information as to officials                )  *
     and affiliated persons of Depositor                )
29.  Voting Securities of Depositor                     )  Information About the Sponsor
30.  Persons controlling Depositor                      )
31.  Payments by Depositor for certain                  )
     services rendered to trust                         )
32.  Payments by Depositor for certain                  )  *
     other services rendered to trust                   )
33.  Remuneration of employees of Depositor             )
     for certain services rendered to trust             )
34.  Remuneration of other persons for                  )
     certain services rendered to trust                 )

          IV. DISTRIBUTION AND REDEMPTION OF SECURITIES
35.  Distribution of trust's securities by states       )  *
36.  Suspension of sales of trust's securities          )
37.  Revocation of authority to distribute              )
38.  (a)  Method of distribution                        )
     (b)  Underwriting agreements                       )  How Units of The Trusts Are
                                                        )  Distributed To The Public
     (c)  Selling agreement                             )
39.  (a)  Organization of principal underwriter         )  Information About The Sponsor
     (b)  NASD membership of principal underwriter      )
40.  Certain fees received by principal underwriter     )  *
41.  (a)  Business of principal underwriter             )
     (b)  Branch offices of principal underwriter       )  *
     (c)  Salesmen of principal underwriter             )
42.  Ownership of trust's securities by                 )  *
     certain persons                                    )
43.  Certain brokerage commissions received             )  *
     by principal underwriter                           )
44.  (a)  Method of valuation                           )  Part A -- Essential Information
                                                        )  How Is The Public Offering Price Determined?
                                                        )  How Was The Price Of The Bonds
                                                        )  Determined At The Date of Deposit?
                                                        )  What Are Normal Trust Operating Expenses?
     (b)  Schedule as to offering price                 )  *
     (c)  Variation in offering price to                )  How Is the Public Offering Price
          certain persons                               )  Determined?
                                                        )  What Is Accrued Interest?
                                                        )  How Was The Price Of The Bonds
                                                        )  Determined At The Date of Deposit?
45.  Suspension of redemption rights                    )  *


46.  (a)  Redemption valuation                          )  Unit Value and Evaluation
                                                        )  How Units May Be Redeemed Without Charge
                                                        )  How Units May Be Purchased By The Sponsor
     (b)  Schedule as to redemption price               )  *
47.  Maintenance of position in underlying              )  How Is the Public Offering Price
     securities                                         )  Determined?
                                                        )  How Units May Be Purchased By The Sponsor

          V. INFORMATION CONCERNING THE TRUSTEE OR CUSTODIAN
48.  Organization and regulation of Trustee             )  Information About The Trustee
49.  Fees and expenses of Trustee                       )  Part A -- Essential Information
                                                        )  What Are Normal Trust Operating Expenses?
50.  Trustee's lien                                     )  What Are Normal Trust Operating Expenses?
                                                        )  When Are Distributions Made To Unitholders?

          VI. INFORMATION CONCERNING INSURANCE OF HOLDERS OF SECURITIES
51.  Insurance of holders of trust's securities         )  *

          VII. POLICY OF REGISTRANT
52.  (a)  Provisions of trust agreement with            )  What Are Normal Trust Operating
          respect to selection or elimination           )  Expenses?
          of underlying securities                      )
                                                        )  How Units May Be Redeemed Without Charge
                                                        )  How Bonds May Be Removed From The Trusts
     (b)  Transactions involving elimination            )  *
          of underlying securities                      )
     (c)  Policy regarding substitution or              )  Summary of Portfolios
          elimination of underlying securities          )
                                                        )  Composition of Trusts
                                                        )  How Bonds May Be Removed From The Trusts
     (d)  Fundamental policy not otherwise covered      )  *
53.  Tax status of trust                                )  What Is The Tax Status Of Unitholders?

          VIII. FINANCIAL AND STATISTICAL INFORMATION
54.  Trust's securities during last ten years           )  *
55.                                                     )
56.  Certain information regarding                      )  *
     periodic payment certificate                       )
57.                                                     )
58.                                                     )


* Inapplicable, omitted, answer negative or not required.


                                  MAY 30, 1997
                             SUBJECT TO COMPLETION

                                           A

NUVEEN                  NUVEEN COLORADO INSURED TRUST 68
                    (NUVEEN TAX-FREE UNIT TRUSTS SERIES 943)

                                               CUSIP NUMBERS:

                                               Monthly:               6706E9 556
                                               Quarterly:             6706E9 564
                                               Semi-Annually:         6706E9 572

PROSPECTUS--PART A (SPECIFIC TERMS) -- MAY 30, 1997
THIS PART A OF THE PROSPECTUS MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY THE
PART B OF

THE NUVEEN TAX-FREE UNIT TRUSTS PROSPECTUS DATED FEBRUARY 1, 1997, TO WHICH SUCH

REFERENCE
HEREIN APPLIES. BOTH PARTS OF THE PROSPECTUS SHOULD BE RETAINED FOR FUTURE
REFERENCE.

Colorado Insured Trust 68 (the "Trust") consists of a portfolio of interest-bearing obligations issued by or on behalf of the State of Colorado, certain United States Territories or authorities and political subdivisions thereof which, in the opinion of recognized bond counsel to the issuing authorities, provide income which is exempt from Federal income tax and Colorado income tax, to the extent indicated below.

The objectives of the Trust are income exempt from Federal and state income taxes, and conservation of capital. The objectives are, of course, dependent upon the continuing ability of the issuers, obligors and/or insurers to meet their respective obligations.

The Portfolio of the Trust consists of 7 obligations issued by entities located in Colorado and one obligation issued by an entity located in the Territory of Puerto Rico. The Bonds in the Trust are either general obligations of the governmental entity issuing them and are backed by the taxing power thereof or are payable as to principal and interest from the income of a specific project or authority and are not supported by the issuer's power to levy taxes. The sources of payment for the Bonds are divided as follows:

   NUMBER OF                                              PORTFOLIO
    ISSUES                PURPOSE OF ISSUE                PERCENTAGE
---------------  ----------------------------------------------------
       3         Water and/or Sewer Revenue                   38.5   %
       3         General Obligations                          32.9
       1         Transportation Facility Revenue              14.3
       1         College and University Revenue               14.3

Approximately 4.3% of the aggregate principal amount of the Bonds in the Trust (accounting for approximately 1.6% of the aggregate offering price of the Bonds) are original issue discount obligations. Certain of these original issue discount obligations, amounting to 4.3% of the aggregate principal amount and 1.6% of the aggregate offering price of the Bonds in the Trust, are "zero coupon" bonds. See "RISK FACTORS" in Part B of this Prospectus for a discussion of the characteristics of such obligations and of the risks associated therewith.

All of the Bonds in the Trust are covered by policies of insurance obtained from the MBIA Insurance Corporation guaranteeing payment of principal and interest when due. As a result of such insurance, the Bonds in the Trust have received a rating of "Aaa" by Moody's, "AAA" by Fitch, and/or "AAA" by Standard & Poor's. Insurance does not guarantee the market value of the Bonds or of Trust Units.

The Trust is considered to be concentrated in Bonds of Water and/or Sewer Revenue Issuers whose revenues are subject to certain risks including problems obtaining timely and adequate rate increases and population decline resulting in decreased user fees. For a discussion of the risks associated with investments in the bonds of various issuers, see "RISK FACTORS" in Part B of this Prospectus.

ESSENTIAL INFORMATION
REGARDING THE NUVEEN COLORADO INSURED TRUST 68
ON THE BUSINESS DAY PRIOR TO THE DATE OF DEPOSIT, MAY 29, 1997

Sponsor and Evaluator.......... John Nuveen & Co. Incorporated
Trustee.............................. The Chase Manhattan Bank
       ------------------------------------------------

The income, expense and distribution data set forth below have been calculated for Unitholders receiving monthly, quarterly or semi-annual distribution options.

Principal Amount of Bonds in Trust..................  $     3,500,000
Number of Units.....................................           35,000
Fractional Undivided Interest in Trust Per Unit.....         1/35,000
Public Offering Price--Less than 500 Units
    Aggregate Offering Price of Bonds in Trust......  $     3,384,388
    Divided by Number of Units......................  $         96.70
    Plus Sales Charge 4.9% (5.152% of the Aggregate
     Offering Price of the Bonds per Unit)..........  $          4.98
    Public Offering Price Per Unit(1)...............  $        101.68
Redemption Price Per Unit (exclusive of accrued
  interest).........................................  $         96.25
Sponsor's Initial Repurchase Price Per Unit
  (exclusive of accrued interest)...................  $         96.70
Excess of Public Offering Price Per Unit over
  Redemption Price Per Unit.........................  $          5.43
Excess of Public Offering Price Per Unit over
  Sponsor's Repurchase Price Per Unit...............  $          4.98
Average Maturity of Bonds in the Trust(2)...........       24.9 years


THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

Information contained herein is subject to completion or amendment. A registration statement relating to these securities has been filed with the Securities and Exchange Commission. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. This Prospectus shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any State in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any State.

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ESSENTIAL INFORMATION (CONT.)

                                                  MONTHLY        QUARTERLY      SEMI-ANNUAL
                                                -----------     -----------     -----------
  Calculation of Estimated Net Annual
    Interest Income Per Unit
      Annual Interest Income(3)............         $5.3006         $5.3006        $5.3006
      Less Estimated Annual Expense........          $.2392          $.2072         $.1882
                                                -----------     -----------     -----------
      Estimated Net Annual Interest
        Income(4)..........................         $5.0614         $5.0934        $5.1124
  Daily Rate of Accrual Per Unit...........         $.01405         $.01414        $.01420
  ESTIMATED CURRENT RETURN(5)..............            4.98%           5.01%          5.03 %
  ESTIMATED LONG TERM RETURN(5)............            5.08%           5.11%          5.13 %
  Trustee's Annual Fees(6).................         $1.5304         $1.2104        $1.0204
Date of Deposit.......................................................................................May 30, 1997
Settlement Date.......................................................................................June 4, 1997
Mandatory Termination Date....................................See "OTHER INFORMATION" in Part B of this Prospectus
Minimum Value of Each Trust...................................See "OTHER INFORMATION" in Part B of this Prospectus
Sponsor's Annual Evaluation Fee.........................................$0.17 per $1,000 principal amount of Bonds
Estimated Annual Organizational Expenses(7).......................................................$.02914 per Unit
- ----------

BECAUSE CERTAIN OF THE BONDS IN THE TRUST WILL NOT BE DELIVERED TO THE TRUSTEE UNTIL AFTER THE SETTLEMENT DATE FOR
A  PURCHASE OF UNITS MADE ON THE DATE OF DEPOSIT, INTEREST THAT ACCRUES ON THOSE BONDS BETWEEN THE DATE OF DEPOSIT
AND SUCH DELIVERY DATE WILL BE TREATED  AS A RETURN OF PRINCIPAL RATHER  THAN AS TAX-EXEMPT INCOME. THE AMOUNT  OF
ANY  SUCH RETURN  OF PRINCIPAL  IS NOT  INCLUDED IN THE  ANNUAL INTEREST  INCOME SHOWN  ABOVE. FOR  THE TRUST, THE
FOLLOWING SETS FORTH THE LATEST SCHEDULED BOND DELIVERY DATE, THE AMOUNT PER UNIT THAT WILL BE TREATED AS A RETURN
OF PRINCIPAL TO  UNITHOLDERS WHO  PURCHASE ON THE  DATE OF  DEPOSIT, AND THE  ESTIMATED CURRENT  RETURN UNDER  THE
MONTHLY  DISTRIBUTION PLAN AFTER THE FIRST YEAR, ASSUMING THE  PORTFOLIO AND ESTIMATED ANNUAL EXPENSES DO NOT VARY
FROM THAT SET FORTH ABOVE (SEE "WHAT  ARE NORMAL TRUST OPERATING EXPENSES?" IN  PART B OF THIS PROSPECTUS AND  THE
"SCHEDULE  OF INVESTMENTS").  THE ESTIMATED  CURRENT RETURN  AFTER THE FIRST  YEAR WILL  ALSO BE  HIGHER UNDER THE
QUARTERLY AND SEMI-ANNUAL DISTRIBUTION PLANS:

                                   LATEST SCHEDULED         PER UNIT         ESTIMATED CURRENT RETURN
                                    DELIVERY DATE     RETURN OF PRINCIPAL      AFTER THE FIRST YEAR
                                  ------------------  --------------------   -------------------------
  COLORADO INSURED TRUST........    JUNE 19, 1997     $           .03                     5.01        %

The evaluation time for purpose of sale, purchase or redemption of Units is 4
p.m. Eastern time or as of any earlier closing time on a day on which the New York Stock Exchange is scheduled in advance to close at such earlier time. (See "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?" in Part B of this Prospectus.)

(1) Units are offered at the Public Offering Price plus accrued interest from the preceding Record Date to, but not including, the date of settlement (normally three business days after purchase). The Date of Deposit of the Fund has been designated as the First Record Date for all plans of distribution of the Trust and, accordingly, for Units purchased on the Date of Deposit, $.05 of accrued interest to the Settlement Date will be added to the Public Offering Price. (See "WHAT IS ACCRUED INTEREST?" in Part B of this Prospectus.)

(2) The Average Maturity of Bonds in the Trust is calculated based upon the stated maturities of the Bonds in the Trust (or, with respect to Bonds for which funds or securities have been placed in escrow to redeem such Bonds on a stated call date, based upon such call date). The Average Maturity of Bonds in the Trust may increase or decrease from time to time as Bonds mature or are called or sold.

(3) Assumes delivery of all Bonds. (See "COMPOSITION OF TRUSTS" appearing in Part B of this Prospectus.) Interest income does not include accretion of original issue discount on "zero coupon" Bonds, Stripped Obligations or other original issue discount Bonds. (See "RISK FACTORS" in Part B of this Prospectus.)

(4) The amount and timing of interest distributions from the Trust under the various plans of distribution are set forth below. It is anticipated that the amount of interest to be distributed per Unit in each year under each plan of distribution will initially be substantially equal to the Estimated Net Annual Interest Income per Unit for that plan. The amount of interest to be distributed annually per Unit, will generally change as Bonds are redeemed, mature or are sold or as fees and expenses increase or decrease.

(5) Estimated Long Term Return for the Trust represents the average of the yields to maturity (or call) of the Bonds in the Trust's portfolio calculated in accordance with accepted bond practices and adjusted to reflect a compounding factor, expenses and sales charges. Estimated Current Return is computed by dividing the Net Annual Interest Income per Unit by the Public Offering Price, and in contrast to Estimated Long Term Return does not reflect the amortization of premium or accretion of discount, if any. For more information see "WHAT ARE ESTIMATED LONG TERM RETURN AND ESTIMATED CURRENT RETURN?" in Part B of this Prospectus.

(6) Each Trustee annual fee is per $1,000 principal amount of the underlying Bonds in the Trust for that portion of the Trust that represents a particular plan of distribution.

(7) The Trust (and therefore Unitholders) will bear all or a portion of its organizational costs (including costs of preparing the registration statements, the trust indenture and other closing documents, registering Units with the Securities and Exchange Commission and states, the initial audit of the Trust portfolio, initial evaluation fees, legal fees and the initial fees and expenses of the Trustee but not including the expenses incurred in the printing of preliminary and final prospectuses, and expenses incurred in the preparation and printing of brochures and other advertising materials and any other selling expenses) as is common for mutual funds. Total organizational expenses will be amortized over a five year period. See "WHAT ARE NORMAL TRUST OPERATING EXPENSES?" in Part B of this Prospectus and "Statement of Condition." Historically, the sponsors of unit investment trusts have paid all the costs of establishing such trusts.

2 of 7

INTEREST DISTRIBUTION

Details of interest distributions per Unit of the Trust under the various plans appear in the following table based upon estimated Net Annual Interest Income at the Date of Deposit:

                                                                                                                       NORMAL
                                                                                                                   DISTRIBUTIONS
                                                         1997                                  1998                   PER YEAR
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        7/1            8/1           11/1            2/1            5/1
Distribution Date.....................       7/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4364(1)                                                               $  5.0947
                                                              --------   $.4245 every month   --------
Quarterly Distribution Plan...........  $   .4364(1)   $   .4272(2)   $  1.2816      $  1.2816      $  1.2816      $  5.1267
Semi-Annual Distribution Plan.........  $   .4364(1)                  $  1.7148(3)                  $  2.5722      $  5.1457
- ---------------------------------------------------------------------------------------------------------------------------------

* Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1, August 1 and November 1. Record Dates for monthly distributions are the first day of each month. Distribution Dates under each distribution plan are the fifteenth day of the month in which the respective Record Date occurred. For additional information see "WHEN ARE DISTRIBUTIONS MADE TO UNITHOLDERS?" in Part B of this Prospectus.

(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may be more or less than a regular monthly distribution.

(2) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly distributions will be regular 3-month distributions.

(3) The second distribution under the semi-annual distribution plan represents a 4-month distribution; subsequent semi-annual distributions will be regular 6-month distributions.

COLORADO RISK FACTORS

The financial condition of the State of Colorado is affected by various national, economic, social and environmental policies and conditions. Additionally, Constitutional and statutory limitations imposed on the State and its local governments concerning taxes, bond indebtedness and other matters may constrain the revenue-generating capacity of the State and its local governments and, therefore, the ability of the issuers of the Bonds to satisfy their obligations. Historically, the State has experienced significant revenue shortfalls. A recently passed, but somewhat ambiguous Constitutional Amendment requires voter approval prior to tax increases, creation of debt, or until levy or valuation for assessment ratio increases. The Amendment also limits increases in government spending and property tax revenues to specified percentages.

The economic vitality of the State and its various regions and, therefore, the ability of the State and its local governments to satisfy the Bonds, are affected by numerous factors. The economy of the State continues to be dependent on tourism and its position as a transportation hub. These sectors tend to be cyclical.

The State is a party to numerous lawsuits in which an adverse final decision could materially affect the State's governmental operations and consequently its ability to pay debt service on its obligations.

Further information concerning Colorado risk factors may be obtained upon written or telephonic request to the Trustee as described in "OTHER INFORMATION
- -- Supplemental Information" appearing in Part B of this Prospectus.

TAX STATUS

For a discussion of the Federal tax status of income earned on Trust Units, see "WHAT IS THE TAX STATUS OF UNITHOLDERS?" in Part B of this Prospectus.

In the opinion of Sherman & Howard L.L.C., special Colorado counsel to the Trust, under existing law:

A Trust will consist of obligations which were issued by the State of Colorado or its political subdivisions or by the United States or possessions of the United States including Puerto Rico, the Virgin Islands and Guam ("Colorado Bonds").

Because Colorado income tax law is based upon the Federal law and in light of the opinion of Chapman and Cutler, the Trust is not an association taxable as a corporation for purposes of Colorado income taxation.

With respect to Colorado Unitholders, in view of the relationship between Federal and Colorado tax computations described above and the opinion of Chapman and Cutler referred to above:

Each Colorado Unitholder will be treated as owning a share of each asset of the Trust for Colorado income tax purposes, in the proportion that the number of Units of such Trust held by him bears to the total number of outstanding Units of the Trust, and the income of the Trust will therefore be treated as the income of each Colorado Unitholder under Colorado law in the proportion described.

3 of 7

Interest on Colorado Bonds that would not be subject to Colorado income tax or Colorado alternative minimum tax when paid directly to a Colorado Unitholder will not be subject to Colorado income tax or alternative minimum tax when received by the Trust and attributed to such Colorado Unitholder and when distributed to such Colorado Unitholder.

Any proceeds paid under an insurance policy issued to the issuer of the Colorado Bonds involved, to the Depositor prior to deposit of the Colorado Bonds in the Trust, or to the Trust, which proceeds represent maturing interest on defaulted Colorado Bonds and which proceeds would not be subject to Colorado income tax or alternative minimum tax when paid directly to a Colorado Unitholder will not be subject to Colorado income and alternative minimum tax when received by the Trust and attributed to such Colorado Unitholder and when distributed to such Colorado Unitholder.

Each Colorado Unitholder will realize gain or loss taxable in Colorado when the Trust disposes of a Colorado Bond (whether by sale, exchange, redemption or payment at maturity) or when the Colorado Unitholder redeems or sells Units at a price that differs from original cost as adjusted for amortization of bond discount or premium and other basis adjustments (including any basis reduction that may be required to reflect a Colorado Unitholder's share of interest, if any, accruing on Colorado Bonds during the interval between the Colorado Unitholder's settlement date and the date such Colorado Bonds are delivered to the Trust, if later).

Tax cost reduction requirements relating to amortization of bond premium may, under some circumstances, result in Colorado Unitholders realizing gain taxable in Colorado when their Units are sold or redeemed for an amount equal to or less than their original cost.

If interest on indebtedness incurred or continued by a Colorado Unitholder to purchase Units in the Trust is not deductible for Federal income tax purposes, it will not be deductible for Colorado income tax purposes.

4 of 7

NUVEEN COLORADO INSURED TRUST 68
(NUVEEN TAX-FREE UNIT TRUST SERIES 943)

SCHEDULE OF INVESTMENTS AT THE DATE OF DEPOSIT, MAY 30, 1997

                                                                                          Ratings(3)           Trustee's
                                                                      Optional       ---------------------   Determination
 Aggregate        Name of Issuer and Title of Issue Represented      Redemption       Standard                of Offering
  Principal        by Sponsor's Contracts to Purchase Bonds(1)      Provisions(2)     & Poor's    Moody's        Price
- ---------------------------------------------------------------------------------------------------------------------------
$   500,000      Board of Trustees of the University of Northern     2007 at 100        AAA         Aaa     $       501,250
                   Colorado, Auxiliary Facilities System Revenue
                   Improvement Bonds, Series 1997, 5.60% Due
                   6/1/24.
    500,000     * Colorado Water Resources and Power Development     2007 at 101        AAA         Aaa             501,250
                   Authority, Small Water Resources Revenue
                   Bonds, 1997 Series A, 5.60% Due 11/1/17.
                   (When issued.)
    500,000      Adams County School District No. 14, Adams          2007 at 101        AAA         Aaa             497,040
                   County, Colorado, General Obligation Bonds,
                   Series 1997, 5.50% Due 12/1/16.
    500,000      City and County of Denver, Colorado, Airport        2005 at 102        AAA         Aaa             493,125
                   System Revenue Bonds, Series 1995A, 5.70% Due
                   11/15/25.
    350,000      Fountain Valley Authority (Colorado), Water         2006 at 100        AAA         Aaa             351,838
                   Treatment Refunding Revenue Bonds, Series
                   1996, 5.625% Due 12/1/19.
    150,000      City of Thornton, Colorado, General Obligation   No Optional Call      AAA         Aaa              53,985
                   Water Refunding Capital Appreciation Bonds,
                   Series 1991, 0.00% Due 12/1/15. (Original
                   issue discount bonds delivered on or about
                   March 14, 1991 at a price of 18.927% of
                   principal amount.)
    500,000      Widefield Water and Sanitation District, El         2007 at 102        AAA         Aaa             500,000
                   Paso County, Colorado, Water and Sewer
                   Revenue Refunding and Improvement Bonds,
                   Series 1997A, 5.60% Due 12/1/26.
    500,000      Commonwealth of Puerto Rico, Public Improvement   2006 at 101 1/2      AAA         Aaa             485,900
                   Bonds of 1996 (General Obligation Bonds.),
                   5.40% Due 7/1/25.
- -----------                                                                                                 ---------------
$ 3,500,000                                                                                                 $     3,384,388
- -----------                                                                                                 ---------------
- -----------                                                                                                 ---------------

*_ These Bonds, or a portion thereof, have delivery dates beyond the normal settlement date. Their expected delivery date is June 19, 1997. Contracts relating to Bonds with delivery dates after the date of settlement for purchase made on the Date of Deposit constitute approximately 14% of the aggregate principal amount of the Trust. (See "COMPOSITION OF TRUSTS" in Part B of this Prospectus.)


(1) The Sponsor's contracts to purchase Bonds were entered into during the period from May 28, 1997 to May 29, 1997. Other information regarding the Bonds in the Trust on the Date of Deposit is as follows:

                                                                      ANNUAL
                                                         PROFIT      INTEREST
                                            COST TO     (OR LOSS)    INCOME TO    BID PRICE
                 TRUST                      SPONSOR    TO SPONSOR      TRUST      OF BONDS
----------------------------------------  -----------  -----------  -----------  -----------
COLORADO INSURED TRUST 68...............  $ 3,374,230  $   10,158   $  186,688   $ 3,368,513

In addition, the difference between the Trustee's determination of Offering Price and Bid Price (as a percentage of principal amount) is .45%. Neither cost to Sponsor nor profit (or loss) to Sponsor reflects underwriting profits or losses received or incurred by the Sponsor through its participation in underwriting syndicates. The Sponsor did not participate as either the sole underwriter or as a manager or member of a syndicate that acted as the original underwriter of any of the Bonds.

(2) The Bonds are first subject to optional redemption in the years, and at the prices, shown. Unless otherwise indicated, the Bonds, except for Bonds issued at a substantial original issue discount, are redeemable at declining prices (but not below par value) in subsequent years. Original issue discount bonds, including zero coupon bonds, are generally redeemable at prices based on the issue price plus the amount of original issue discount accreted to redemption plus, if applicable, some premium, the amount of which will decline in subsequent years. The Bonds may also be subject to sinking fund redemption without premium prior to the dates shown. Certain Bonds may be subject to redemption without premium prior to the date shown pursuant to special or mandatory call provisions specified in the instruments setting forth the terms and provisions of such Bonds. See "COMPOSITION OF TRUSTS", "WHAT IS THE TAX STATUS OF UNITHOLDERS?" and "RISK FACTORS" in Part B of this Prospectus.

(3) All the Bonds in the Insured Trusts, as insured by the Insurer, are rated AAA by Standard & Poor's, AAA by Fitch and/or Aaa by Moody's. The insurance obtained by the Trust guarantees the payment of interest and principal on the Bonds when due but does not cover certain market risks associated with fixed income securities such as accelerated payments, premiums payable on mandatory redemptions or interest rate risks. (See "WHY AND HOW ARE THE BONDS INSURED?" in Part B of this Prospectus and "Description of Ratings" in the Information Supplement.)

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Statement of Condition

NUVEEN COLORADO INSURED TRUST 68

(Nuveen Tax-Free Unit Trust, Series 943)

AS OF MAY 30, 1997

    TRUST PROPERTY
Sponsor's contracts to purchase Tax-Free Bonds,
  backed by an irrevocable letter of
  credit(1)(2)....................................  $    3,384,388
Accrued interest to May 30, 1997 on underlying
  Bonds(1)........................................          35,928
Organizational costs(3)...........................           5,100
                                                    --------------
            Total.................................  $    3,425,416
                                                    --------------
                                                    --------------
   LIABILITIES AND INTEREST OF UNITHOLDERS
LIABILITIES:
    Accrued interest to May 30, 1997 on underlying
     Bonds(4).....................................  $       35,928
    Accrued organizational costs(3)...............           5,100
                                                    --------------
            Total.................................  $       41,028
                                                    --------------
                                                    --------------
INTEREST OF UNITHOLDERS:
    Units of fractional undivided interest
     outstanding (35,000)
      Cost to investors(5)........................  $    3,558,752
        Less: Gross underwriting commission(6)....        (174,364)
                                                    --------------
    Net amount applicable to investors............  $    3,384,388
                                                    --------------
            Total.................................  $    3,425,416
                                                    --------------
                                                    --------------


(1) Represented by contracts to purchase Tax-Exempt Bonds which include "when issued" or "regular way" or "delayed delivery" contracts for which an irrevocable letter of credit issued by a major commercial bank has been deposited with the Trustee on the Date of Deposit. The amount of such letter of credit and any cash deposited exceeds the amount necessary for the purchase of the Bonds plus accrued interest to the Date of Deposit. At the Date of Deposit, Bonds may have been delivered to the Sponsor pursuant to certain of these contracts; the Sponsor has assigned to the Trustee all of its rights, title and interest in and to such Bonds.

(2) Aggregate value (at offering prices) as of the Date of Deposit of the Bonds listed under "Schedule of Investments" herein, and their aggregate cost to the Trust are the same. Such offering prices were determined by Kenny S&P Evaluation Services, a division of J.J. Kenny Co., Inc., as of the close of business on the business day prior to the Date of Deposit. (See "HOW WAS THE PRICE OF THE BONDS DETERMINED AT THE DATE OF DEPOSIT?" in Part B of this Prospectus.) Insurance coverage providing for the timely payment, when due, of all principal of and interest on the Bonds in an Insured Trust has been obtained by the Sponsor or by the issuers of such Bonds. Such insurance does not guarantee the market value of the Bonds or the value of the Units. Both the bid and the offering prices of the underlying Bonds and of the Units may include value attributable to such policies of insurance.

(3) The Trust (and therefore Unitholders) will bear all or a portion of its estimated organizational costs which will be deferred and amortized over five years from the Date of Deposit.

(4) Representing, as set forth in "WHAT IS ACCRUED INTEREST?" in Part B of this Prospectus, advancement by the Trustee of an amount equal to the accrued Bond interest as of the Date of Deposit.

(5) Aggregate Public Offering Price (exclusive of accrued interest) computed as set forth under "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?" in Part B of this Prospectus.

(6) The gross underwriting commission of 4.90% of the Public Offering Price has been calculated on the assumption that the Units sold are not subject to a reduction of sales charge for quantity purchases. In single transactions involving 500 Units or more, the sales charge is reduced. (See "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?" in Part B of this Prospectus.)

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REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

TO THE BOARD OF DIRECTORS OF JOHN NUVEEN & CO. INCORPORATED AND UNITHOLDERS OF COLORADO INSURED TRUST 68:

We have audited the accompanying statement of condition and the schedule of investments at date of deposit (included in Part A of this Prospectus) of Colorado Insured Trust 68 (contained in Nuveen Tax-Free Unit Trust, Series 943), as of May 30, 1997. These financial statements are the responsibility of the Sponsor. Our responsibility is to express an opinion on these financial statements based on our audit.

We conducted our audit in accordance with generally accepted auditing standards. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. Our procedures included confirmation of the irrevocable letter of credit arrangement for the purchase of securities, described in Note (1) to the statement of condition, by correspondence with the Trustee. An audit also includes assessing the accounting principles used and significant estimates made by the Sponsor, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.

In our opinion, the statement of condition and the schedule of investments at date of deposit referred to above present fairly, in all material respects, the financial position of Colorado Insured Trust 68 as of May 30, 1997, in conformity with generally accepted accounting principles.

ARTHUR ANDERSEN LLP

Chicago, Illinois,
May 30, 1997.

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                                  MAY 30, 1997
                             SUBJECT TO COMPLETION

                                           A

NUVEEN                 NUVEEN NEW YORK INSURED TRUST 269
                    (NUVEEN TAX-FREE UNIT TRUSTS SERIES 943)

                                               CUSIP NUMBERS:

                                               Monthly:               67102K 580
                                               Quarterly:             67102K 598
                                               Semi-Annually:         67102K 606

PROSPECTUS--PART A (SPECIFIC TERMS) -- MAY 30, 1997
THIS PART A OF THE PROSPECTUS MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY THE
PART B OF

THE NUVEEN TAX-FREE UNIT TRUSTS PROSPECTUS DATED FEBRUARY 1, 1997, TO WHICH SUCH

REFERENCE
HEREIN APPLIES. BOTH PARTS OF THE PROSPECTUS SHOULD BE RETAINED FOR FUTURE
REFERENCE.

New York Insured Trust 269 (the "Trust") consists of a portfolio of interest-bearing obligations issued by or on behalf of the State of New York, certain United States Territories or authorities and political subdivisions thereof which, in the opinion of recognized bond counsel to the issuing authorities, provide income which is exempt from Federal income tax and New York state and city income taxes, to the extent indicated below.

The objectives of the Trust are income exempt from Federal and state income taxes, and conservation of capital. The objectives are, of course, dependent upon the continuing ability of the issuers, obligors and/or insurers to meet their respective obligations.

The Portfolio of the Trust consists of 8 obligations issued by entities located in New York. The Bonds in the Trust are either general obligations of the governmental entity issuing them and are backed by the taxing power thereof or are payable as to principal and interest from the income of a specific project or authority and are not supported by the issuer's power to levy taxes. The sources of payment for the Bonds are divided as follows:

   NUMBER OF                                              PORTFOLIO
    ISSUES                PURPOSE OF ISSUE                PERCENTAGE
---------------  ----------------------------------------------------
       2         General Obligations                          28.6   %
       2         College and University Revenue               22.9
       1         Industrial Revenue                           14.3
       1         Transportation Facility Revenue              14.3
       1         Water and/or Sewer Revenue                   14.3
       1         Dedicated-Tax Supported Revenue               5.6

Approximately 5.6% of the aggregate principal amount of the Bonds in the Trust (accounting for approximately 1.6% of the aggregate offering price of the Bonds) are original issue discount obligations. Certain of these original issue discount obligations, amounting to 5.6% of the aggregate principal amount and 1.6% of the aggregate offering price of the Bonds in the Trust, are "zero coupon" bonds. See "RISK FACTORS" in Part B of this Prospectus for a discussion of the characteristics of such obligations and of the risks associated therewith.

All of the Bonds in the Trust are covered by policies of insurance obtained from the MBIA Insurance Corporation guaranteeing payment of principal and interest when due. As a result of such insurance, the Bonds in the Trust have received a rating of "Aaa" by Moody's, "AAA" by Fitch, and/or "AAA" by Standard & Poor's. Insurance does not guarantee the market value of the Bonds or of Trust Units.
For a discussion of the risks associated with investments in the bonds of various issuers, see "RISK FACTORS" in Part B of this Prospectus.

ESSENTIAL INFORMATION
REGARDING THE NUVEEN NEW YORK INSURED TRUST 269
ON THE BUSINESS DAY PRIOR TO THE DATE OF DEPOSIT, MAY 29, 1997

Sponsor and Evaluator.......... John Nuveen & Co. Incorporated
Trustee.............................. The Chase Manhattan Bank
       ------------------------------------------------

The income, expense and distribution data set forth below have been calculated for Unitholders receiving monthly, quarterly or semi-annual distribution options.

Principal Amount of Bonds in Trust..................  $     3,500,000
Number of Units.....................................           35,000
Fractional Undivided Interest in Trust Per Unit.....         1/35,000
Public Offering Price--Less than 500 Units
    Aggregate Offering Price of Bonds in Trust......  $     3,367,582
    Divided by Number of Units......................  $         96.22
    Plus Sales Charge 4.9% (5.152% of the Aggregate
     Offering Price of the Bonds per Unit)..........  $          4.96
    Public Offering Price Per Unit(1)...............  $        101.18
Redemption Price Per Unit (exclusive of accrued
  interest).........................................  $         95.75
Sponsor's Initial Repurchase Price Per Unit
  (exclusive of accrued interest)...................  $         96.22
Excess of Public Offering Price Per Unit over
  Redemption Price Per Unit.........................  $          5.43
Excess of Public Offering Price Per Unit over
  Sponsor's Repurchase Price Per Unit...............  $          4.96
Average Maturity of Bonds in the Trust(2)...........       27.3 years


THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

Information contained herein is subject to completion or amendment. A registration statement relating to these securities has been filed with the Securities and Exchange Commission. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. This Prospectus shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any State in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any State.

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ESSENTIAL INFORMATION (CONT.)

                                                  MONTHLY        QUARTERLY      SEMI-ANNUAL
                                                -----------     -----------     -----------
  Calculation of Estimated Net Annual
    Interest Income Per Unit
      Annual Interest Income(3)............         $5.4518         $5.4518        $5.4518
      Less Estimated Annual Expense........          $.2441          $.2121         $.1931
                                                -----------     -----------     -----------
      Estimated Net Annual Interest
        Income(4)..........................         $5.2077         $5.2397        $5.2587
  Daily Rate of Accrual Per Unit...........         $.01446         $.01455        $.01460
  ESTIMATED CURRENT RETURN(5)..............            5.15%           5.18%          5.20 %
  ESTIMATED LONG TERM RETURN(5)............            5.18%           5.21%          5.23 %
  Trustee's Annual Fees(6).................         $1.5733         $1.2533        $1.0633
Date of Deposit.......................................................................................May 30, 1997
Settlement Date.......................................................................................June 4, 1997
Mandatory Termination Date....................................See "OTHER INFORMATION" in Part B of this Prospectus
Minimum Value of Each Trust...................................See "OTHER INFORMATION" in Part B of this Prospectus
Sponsor's Annual Evaluation Fee.........................................$0.17 per $1,000 principal amount of Bonds
Estimated Annual Organizational Expenses(7).......................................................$.02971 per Unit
- ----------

The evaluation time for purpose of sale, purchase or redemption of Units is 4
p.m. Eastern time or as of any earlier closing time on a day on which the New York Stock Exchange is scheduled in advance to close at such earlier time. (See "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?" in Part B of this Prospectus.)

(1) Units are offered at the Public Offering Price plus accrued interest from the preceding Record Date to, but not including, the date of settlement (normally three business days after purchase). The Date of Deposit of the Fund has been designated as the First Record Date for all plans of distribution of the Trust and, accordingly, for Units purchased on the Date of Deposit, $.06 of accrued interest to the Settlement Date will be added to the Public Offering Price. (See "WHAT IS ACCRUED INTEREST?" in Part B of this Prospectus.)

(2) The Average Maturity of Bonds in the Trust is calculated based upon the stated maturities of the Bonds in the Trust (or, with respect to Bonds for which funds or securities have been placed in escrow to redeem such Bonds on a stated call date, based upon such call date). The Average Maturity of Bonds in the Trust may increase or decrease from time to time as Bonds mature or are called or sold.

(3) Assumes delivery of all Bonds. (See "COMPOSITION OF TRUSTS" appearing in Part B of this Prospectus.) Interest income does not include accretion of original issue discount on "zero coupon" Bonds, Stripped Obligations or other original issue discount Bonds. (See "RISK FACTORS" in Part B of this Prospectus.)

(4) The amount and timing of interest distributions from the Trust under the various plans of distribution are set forth below. It is anticipated that the amount of interest to be distributed per Unit in each year under each plan of distribution will initially be substantially equal to the Estimated Net Annual Interest Income per Unit for that plan. The amount of interest to be distributed annually per Unit, will generally change as Bonds are redeemed, mature or are sold or as fees and expenses increase or decrease.

(5) Estimated Long Term Return for the Trust represents the average of the yields to maturity (or call) of the Bonds in the Trust's portfolio calculated in accordance with accepted bond practices and adjusted to reflect a compounding factor, expenses and sales charges. Estimated Current Return is computed by dividing the Net Annual Interest Income per Unit by the Public Offering Price, and in contrast to Estimated Long Term Return does not reflect the amortization of premium or accretion of discount, if any. For more information see "WHAT ARE ESTIMATED LONG TERM RETURN AND ESTIMATED CURRENT RETURN?" in Part B of this Prospectus.

(6) Each Trustee annual fee is per $1,000 principal amount of the underlying Bonds in the Trust for that portion of the Trust that represents a particular plan of distribution.

(7) The Trust (and therefore Unitholders) will bear all or a portion of its organizational costs (including costs of preparing the registration statements, the trust indenture and other closing documents, registering Units with the Securities and Exchange Commission and states, the initial audit of the Trust portfolio, initial evaluation fees, legal fees and the initial fees and expenses of the Trustee but not including the expenses incurred in the printing of preliminary and final prospectuses, and expenses incurred in the preparation and printing of brochures and other advertising materials and any other selling expenses) as is common for mutual funds. Total organizational expenses will be amortized over a five year period. See "WHAT ARE NORMAL TRUST OPERATING EXPENSES?" in Part B of this Prospectus and "Statement of Condition." Historically, the sponsors of unit investment trusts have paid all the costs of establishing such trusts.

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INTEREST DISTRIBUTION

Details of interest distributions per Unit of the Trust under the various plans appear in the following table based upon estimated Net Annual Interest Income at the Date of Deposit:

                                                                                                                       NORMAL
                                                                                                                   DISTRIBUTIONS
                                                         1997                                  1998                   PER YEAR
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        7/1            8/1           11/1            2/1            5/1
Distribution Date.....................       7/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4482(1)                                                               $  5.2077
                                                                 --------$.4338 every month--------
Quarterly Distribution Plan...........  $   .4482(1)   $   .4365(2)   $  1.3095      $  1.3095      $  1.3095      $  5.2397
Semi-Annual Distribution Plan.........  $   .4482(1)                  $  1.7520(3)                  $  2.6280      $  5.2587
- ---------------------------------------------------------------------------------------------------------------------------------

* Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1, August 1 and November 1. Record Dates for monthly distributions are the first day of each month. Distribution Dates under each distribution plan are the fifteenth day of the month in which the respective Record Date occurred. For additional information see "WHEN ARE DISTRIBUTIONS MADE TO UNITHOLDERS?" in Part B of this Prospectus.

(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may be more or less than a regular monthly distribution.

(2) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly distributions will be regular 3-month distributions.

(3) The second distribution under the semi-annual distribution plan represents a 4-month distribution; subsequent semi-annual distributions will be regular 6-month distributions.

NEW YORK RISK FACTORS

The financial condition of the State of New York is affected by various national, economic, social and environmental policies and conditions. Additionally, Constitutional and statutory limitations imposed on the State and its local governments concerning taxes, bond indebtedness and other matters may constrain the revenue-generating capacity of the State and its local governments and, therefore, the ability of the issuers of the Bonds to satisfy their obligations. Historically, the State has been one of the wealthiest states in the nation; however, for decades the State economy has grown more slowly than that of the nation as a whole, gradually eroding the State's relative economic affluence.

The economic vitality of the State and its various regions and, therefore, the ability of the State and its local governments to satisfy the Bonds, are affected by numerous factors. The economy of the State continues to be influenced by the financial health of the City of New York, which faces greater competition as other major cities develop financial and business capabilities. The State has for many years had a very high state and local tax burden relative to other states. The burden of State and local taxation, in combination with the many other causes of regional economic dislocation, has contributed to the decisions of some businesses and individuals to relocate outside, or not locate within, the State.

The State is party to numerous lawsuits in which an adverse final decision could materially affect the State's governmental operations and consequently its ability to pay debt service on its obligations. On January 21, 1994, the State entered into a settlement with Delaware with respect to STATE OF DELAWARE V. STATE OF NEW YORK. The State made an immediate $35 million payment and agreed to make a $33 million annual payment in each of the next five fiscal years. The State has not settled with other parties to the litigation and will continue to incur litigation expenses as to those claims.

All outstanding general obligation bonds of the State are rated "A-" by Standard and Poor's and "A" by Moody's.

Further information concerning New York risk factors may be obtained upon written or telephonic request to the Trustee as described in "OTHER INFORMATION
- -- Supplemental Information" appearing in Part B of this Prospectus.

TAX STATUS

For a discussion of the Federal tax status of income earned on Trust Units, see "WHAT IS THE TAX STATUS OF UNITHOLDERS?" in Part B of this Prospectus.

In the opinion of Edwards & Angell, special counsel for the Trust for New York tax matters, under existing law:

Interest on obligations issued by New York State, a political subdivision thereof, Puerto Rico, the Virgin Islands, Guam, the Northern Mariana Islands, or other possessions of the United States within the meaning of Section 103(c) of the Internal Revenue Code of 1986, as amended ("New York Obligations"), which would be

3 of 7

exempt from New York State or New York City personal income tax if directly received by a Unitholder, will retain its status as tax-exempt interest when received by the Trust and distributed to such Unitholder. Thus, interest on bonds received by Unitholders which is not subject to New York State tax is also exempt from New York City personal income tax.

Interest (less amortizable premium, if any) derived from the Trust by a resident of New York State (or New York City) in respect of obligations issued by states other than New York (or their political subdivisions) will be subject to New York State (or New York City) personal income tax.

A Unitholder who is a resident of New York State (or New York City) will be subject to New York State (or New York City) personal income tax with respect to gains realized when New York Obligations held in the Trust are sold, redeemed or paid at maturity or when the Unitholder's Units are sold or redeemed; such gain will equal the proceeds of sale, redemption or payment less the tax basis of the New York Obligation or Unit (adjusted to reflect (a) the amortization of premium or discount, if any, on New York Obligations held by the Trust, (b) accrued original issue discount, with respect to each New York Obligation which, at the time the New York Obligation was issued, had original issue discount, and (c) the deposit of New York Obligations with accrued interest in the Trust after the Unitholder's settlement date).

Interest or gain from the Trust derived by a Unitholder who is not a resident of New York State (or New York City) will not be subject to New York State (or New York City) personal income tax, unless the Units are property employed in a business, trade, profession or occupation carried on in New York State (or New York City).

In the case of the Trust, amounts paid under the insurance policies representing maturing interest on defaulted New York Obligations held by the Trustee in the Trust will be excludable from New York State and New York City income if, and to the same extent as, such interest would have been excludable if paid by the respective issuer.

For purposes of the New York State and New York City franchise tax on corporations, Unitholders which are subject to such tax will be required to include in their entire net income any interest or gains distributed to them even though distributed in respect of obligations of any state or subdivision thereof including New York.

If borrowed funds are used to purchase Units in the Trust, all (or part) of the interest on such indebtedness will not be deductible for New York State and New York City tax purposes. The purchase of Units may be considered to have been made with borrowed funds even though such funds are not directly traceable to the purchase of Units in the Trust.

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NUVEEN NEW YORK INSURED TRUST 269
(NUVEEN TAX-FREE UNIT TRUST SERIES 943)

SCHEDULE OF INVESTMENTS AT THE DATE OF DEPOSIT, MAY 30, 1997

                                                                                          Ratings(3)           Trustee's
                                                                      Optional       ---------------------   Determination
 Aggregate        Name of Issuer and Title of Issue Represented      Redemption       Standard                of Offering
  Principal        by Sponsor's Contracts to Purchase Bonds(1)      Provisions(2)     & Poor's    Moody's        Price
- ---------------------------------------------------------------------------------------------------------------------------
$   500,000      Dormitory Authority of the State of New York,       2007 at 102        AAA         Aaa     $       500,000
                   New School for Social Research, Insured
                   Revenue Bonds, Series 1997, 5.75% Due 7/1/26.
    300,000      Dormitory Authority of the State of New York,       2007 at 102        AAA         Aaa             300,000
                   Pace University, Insured Revenue Bonds,
                   Series 1997, 5.75% Due 7/1/26.
    500,000      New York State Energy Research and Development      2006 at 102        AAA         Aaa             487,085
                   Authority, Gas Facilities Revenue Bonds, 1996
                   Series (The Brooklyn Union Gas Company
                   Project), 5.50% Due 1/1/21.
    500,000      Metropolitan Transportation Authority (New        2007 at 101 1/2      AAA         Aaa             500,000
                   York), Commuter Facilities Revenue Bonds,
                   Series 1997A, 5.70% Due 7/1/17.
    500,000      Monroe-Woodbury Central School District, Orange     2006 at 102        AAA         Aaa             498,750
                   County, New York, School District Bonds,
                   1997, 5.70% Due 5/15/27. (General Obligation
                   Bonds.)
    505,000      The City of New York (New York), General            2007 at 101        AAA         Aaa             526,468
                   Obligation Bonds, Fiscal 1997 Series I, 6.25%
                   Due 4/15/27.
    500,000      New York City (New York), Municipal Water           2007 at 101        AAA         Aaa             500,000
                   Finance Authority, Water and Sewer System
                   Revenue Bonds, Fiscal 1997 Series B, 5.75%
                   Due 6/15/29.
    195,000      Municipal Assistance Corporation for the City    No Optional Call      AAA         Aaa              55,279
                   of Troy (New York), General Resolution Bonds,
                   Series 1996B, 0.00% Due 1/15/20. (Original
                   issue discount bonds delivered on or about
                   November 26, 1996 at a price of 27.244% of
                   principal amount.)
- -----------                                                                                                 ---------------
$ 3,500,000                                                                                                 $     3,367,582
- -----------                                                                                                 ---------------
- -----------                                                                                                 ---------------


(1) The Sponsor's contracts to purchase Bonds were entered into during the period from May 28, 1997 to May 29, 1997. Other information regarding the Bonds in the Trust on the Date of Deposit is as follows:

                                                                      ANNUAL
                                                         PROFIT      INTEREST
                                            COST TO     (OR LOSS)    INCOME TO    BID PRICE
                 TRUST                      SPONSOR    TO SPONSOR      TRUST      OF BONDS
----------------------------------------  -----------  -----------  -----------  -----------
NEW YORK INSURED TRUST 269..............  $ 3,350,026  $   17,556   $  190,813   $ 3,351,194

In addition, the difference between the Trustee's determination of Offering Price and Bid Price (as a percentage of principal amount) is .47%. Neither cost to Sponsor nor profit (or loss) to Sponsor reflects underwriting profits or losses received or incurred by the Sponsor through its participation in underwriting syndicates. The Sponsor did not participate as either the sole underwriter or as a manager or member of a syndicate that acted as the original underwriter of any of the Bonds.

(2) The Bonds are first subject to optional redemption in the years, and at the prices, shown. Unless otherwise indicated, the Bonds, except for Bonds issued at a substantial original issue discount, are redeemable at declining prices (but not below par value) in subsequent years. Original issue discount bonds, including zero coupon bonds, are generally redeemable at prices based on the issue price plus the amount of original issue discount accreted to redemption plus, if applicable, some premium, the amount of which will decline in subsequent years. The Bonds may also be subject to sinking fund redemption without premium prior to the dates shown. Certain Bonds may be subject to redemption without premium prior to the date shown pursuant to special or mandatory call provisions specified in the instruments setting forth the terms and provisions of such Bonds. See "COMPOSITION OF TRUSTS", "WHAT IS THE TAX STATUS OF UNITHOLDERS?" and "RISK FACTORS" in Part B of this Prospectus.

(3) All the Bonds in the Insured Trusts, as insured by the Insurer, are rated AAA by Standard & Poor's, AAA by Fitch and/or Aaa by Moody's. The insurance obtained by the Trust guarantees the payment of interest and principal on the Bonds when due but does not cover certain market risks associated with fixed income securities such as accelerated payments, premiums payable on mandatory redemptions or interest rate risks. (See "WHY AND HOW ARE THE BONDS INSURED?" in Part B of this Prospectus and "Description of Ratings" in the Information Supplement.)

5 of 7

Statement of Condition

NUVEEN NEW YORK INSURED TRUST 269

(Nuveen Tax-Free Unit Trust, Series 943)

AS OF MAY 30, 1997

    TRUST PROPERTY
Sponsor's contracts to purchase Tax-Free Bonds,
  backed by an irrevocable letter of
  credit(1)(2)....................................  $    3,367,582
Accrued interest to May 30, 1997 on underlying
  Bonds(1)........................................          29,862
Organizational costs(3)...........................           5,200
                                                    --------------
            Total.................................  $    3,402,644
                                                    --------------
                                                    --------------
   LIABILITIES AND INTEREST OF UNITHOLDERS
LIABILITIES:
    Accrued interest to May 30, 1997 on underlying
     Bonds(4).....................................  $       29,862
    Accrued organizational costs(3)...............           5,200
                                                    --------------
            Total.................................  $       35,062
                                                    --------------
                                                    --------------
INTEREST OF UNITHOLDERS:
    Units of fractional undivided interest
     outstanding (35,000)
      Cost to investors(5)........................  $    3,541,080
        Less: Gross underwriting commission(6)....        (173,498)
                                                    --------------
    Net amount applicable to investors............  $    3,367,582
                                                    --------------
            Total.................................  $    3,402,644
                                                    --------------
                                                    --------------


(1) Represented by contracts to purchase Tax-Exempt Bonds which include "when issued" or "regular way" or "delayed delivery" contracts for which an irrevocable letter of credit issued by a major commercial bank has been deposited with the Trustee on the Date of Deposit. The amount of such letter of credit and any cash deposited exceeds the amount necessary for the purchase of the Bonds plus accrued interest to the Date of Deposit. At the Date of Deposit, Bonds may have been delivered to the Sponsor pursuant to certain of these contracts; the Sponsor has assigned to the Trustee all of its rights, title and interest in and to such Bonds.

(2) Aggregate value (at offering prices) as of the Date of Deposit of the Bonds listed under "Schedule of Investments" herein, and their aggregate cost to the Trust are the same. Such offering prices were determined by Kenny S&P Evaluation Services, a division of J.J. Kenny Co., Inc., as of the close of business on the business day prior to the Date of Deposit. (See "HOW WAS THE PRICE OF THE BONDS DETERMINED AT THE DATE OF DEPOSIT?" in Part B of this Prospectus.) Insurance coverage providing for the timely payment, when due, of all principal of and interest on the Bonds in an Insured Trust has been obtained by the Sponsor or by the issuers of such Bonds. Such insurance does not guarantee the market value of the Bonds or the value of the Units. Both the bid and the offering prices of the underlying Bonds and of the Units may include value attributable to such policies of insurance.

(3) The Trust (and therefore Unitholders) will bear all or a portion of its estimated organizational costs which will be deferred and amortized over five years from the Date of Deposit.

(4) Representing, as set forth in "WHAT IS ACCRUED INTEREST?" in Part B of this Prospectus, advancement by the Trustee of an amount equal to the accrued Bond interest as of the Date of Deposit.

(5) Aggregate Public Offering Price (exclusive of accrued interest) computed as set forth under "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?" in Part B of this Prospectus.

(6) The gross underwriting commission of 4.90% of the Public Offering Price has been calculated on the assumption that the Units sold are not subject to a reduction of sales charge for quantity purchases. In single transactions involving 500 Units or more, the sales charge is reduced. (See "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?" in Part B of this Prospectus.)

6 of 7

REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

TO THE BOARD OF DIRECTORS OF JOHN NUVEEN & CO. INCORPORATED AND UNITHOLDERS OF NEW YORK INSURED TRUST 269:

We have audited the accompanying statement of condition and the schedule of investments at date of deposit (included in Part A of this Prospectus) of New York Insured Trust 269 (contained in Nuveen Tax-Free Unit Trust, Series 943), as of May 30, 1997. These financial statements are the responsibility of the Sponsor. Our responsibility is to express an opinion on these financial statements based on our audit.

We conducted our audit in accordance with generally accepted auditing standards. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. Our procedures included confirmation of the irrevocable letter of credit arrangement for the purchase of securities, described in Note (1) to the statement of condition, by correspondence with the Trustee. An audit also includes assessing the accounting principles used and significant estimates made by the Sponsor, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.

In our opinion, the statement of condition and the schedule of investments at date of deposit referred to above present fairly, in all material respects, the financial position of New York Insured Trust 269 as of May 30, 1997, in conformity with generally accepted accounting principles.

ARTHUR ANDERSEN LLP

Chicago, Illinois,
May 30, 1997.

7 of 7

B

NUVEEN Tax-Free Unit Trusts
PROSPECTUS -- PART B

(GENERAL TERMS)

FEBRUARY 1, 1997

THIS PART B OF THE PROSPECTUS MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY PART
A. BOTH PARTS OF THIS PROSPECTUS SHOULD BE RETAINED FOR FUTURE REFERENCE.

FURTHER DETAIL REGARDING CERTAIN OF THE INFORMATION PROVIDED IN THE PROSPECTUS MAY BE OBTAINED WITHIN FIVE BUSINESS DAYS OF WRITTEN OR TELEPHONIC REQUEST TO THE TRUSTEE AT 4 NEW YORK PLAZA, NEW YORK, NY 10004-2413 OR (800) 257-8787.

INTEREST INCOME TO A TRUST AND TO UNITHOLDERS, IN THE OPINION OF COUNSEL, UNDER EXISTING LAW IS EXEMPT FROM FEDERAL INCOME TAX. CAPITAL GAINS, IF ANY, ARE SUBJECT TO TAX. IN ADDITION, INTEREST INCOME OF STATE TRUSTS IS, IN THE OPINION OF COUNSEL, EXEMPT, TO THE EXTENT INDICATED, FROM STATE AND LOCAL TAXES. INTEREST INCOME OF ANY TRUST OTHER THAN A STATE TRUST MAY BE SUBJECT TO STATE AND LOCAL TAXES.

CURRENTLY OFFERED AT PUBLIC OFFERING PRICE PLUS INTEREST ACCRUED TO THE DATE OF SETTLEMENT. MINIMUM PURCHASE-- EITHER $5,000 OR 50 UNITS, WHICHEVER IS LESS.

THIS NUVEEN TAX-FREE UNIT TRUST SERIES consists of the underlying separate unit investment trusts set forth in Part A to this Prospectus. Each Trust initially consists of delivery statements relating to contracts to purchase Bonds and, thereafter, will consist of a diversified portfolio of obligations issued by or on behalf of states and territories of the United States and authorities and political subdivisions thereof (see "Schedule of Investments" appearing in Part A of this Prospectus). Except in specific instances as noted in Part A of this Prospectus, the information contained in this Part B shall apply to each Trust in its entirety. All obligations in each Traditional Trust are rated in the category "A" or better by Standard & Poor's, a division of The McGraw Hill Companies ("Standard & Poor's"), Moody's Investors Service, Inc. ("Moody's") or Fitch Investors Service, Inc. ("Fitch") on the Date of Deposit. All obligations in each Insured Trust are covered by policies of insurance obtained from the MBIA Insurance Corporation guaranteeing payment of principal and interest when due. All such policies of insurance remain effective so long as the obligations are outstanding. As a result of such insurance, the Bonds in each portfolio of the Insured Trusts have received a rating of "Aaa" by Moody's, "AAA" by Fitch and/ or "AAA" by Standard & Poor's. INSURANCE RELATES ONLY TO THE BONDS IN THE
INSURED TRUSTS AND NOT TO THE UNITS OFFERED HEREBY OR TO THEIR MARKET VALUE.
(See "WHY AND HOW ARE THE BONDS INSURED?")

THE OBJECTIVES of a Trust are tax-exempt income and conservation of capital through a diversified investment in tax-exempt Bonds. The payment of interest and the preservation of principal are, of course, dependent upon the continuing ability of the issuers of Bonds and of any insurer thereof to meet their obligations thereunder. There is no guarantee that a Trust's objectives will be achieved. (See "RISK FACTORS.")

DISTRIBUTIONS of interest received by a Trust will be made semi-annually unless the Unitholder elects to receive them monthly or quarterly. (See "WHEN ARE DISTRIBUTIONS MADE TO UNITHOLDERS?") Distribution of funds in the Principal Account, if any, will ordinarily be made semi-annually.

FOR ESTIMATED LONG TERM RETURNS AND ESTIMATED CURRENT RETURNS to Unitholders on the business day prior to the Date of Deposit, see Part A of this Prospectus and "WHAT ARE ESTIMATED LONG TERM RETURN AND ESTIMATED CURRENT RETURN?"

THE PUBLIC OFFERING PRICE per Unit of each Trust during the initial offering period is equal to a pro rata share of the OFFERING prices of the Bonds in such Trust's portfolio plus a sales charge of up to 4.90% of the Public Offering Price (equivalent to 5.152% of the net amount invested); the sales charge is somewhat lower on Trusts with lesser average maturities. (See "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?") The Secondary Market Public Offering Price per Unit for each Trust will be equal to a pro rata share of the sum of BID prices of the Bonds in such Trust plus the sales charges determined based on the number of years remaining to the maturity of each Bond. Accrued interest from the preceding Record Date to, but not including, the settlement date (normally three business days after purchase) is added to the Public Offering Price. The sales charge is reduced on a graduated scale for sales involving at least $50,000 or 500 Units and will be applied on whichever basis is more favorable to the purchaser. (See "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?")

A UNITHOLDER MAY REDEEM UNITS at the office of the Trustee at prices based upon the BID prices of the Bonds. The price received upon redemption may be more or less than the amount paid by Unitholders, depending upon the value of the Bonds on the date of tender for redemption. (See "HOW UNITS MAY BE REDEEMED WITHOUT CHARGE.") The Sponsor, although not required to do so, intends to make a secondary market for the Units of the Trusts at prices based upon the BID prices of the Bonds in the respective Trusts. (See "MARKET FOR UNITS.")

RISK FACTORS. An investment in a Trust should be made with an understanding of the risks associated therewith, including, among other factors, the inability of the issuer or an insurer to pay the principal of or interest on a Bond when due, volatile interest rates, early call provisions, and changes to the tax status of the Bonds. See Part A of this Prospectus and "RISK FACTORS."

UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.


NUVEEN Tax-Free Unit Trusts

TABLE OF CONTENTS                                  PAGE
WHAT IS THE NUVEEN TAX-FREE UNIT TRUST?            4
WHAT ARE THE OBJECTIVES OF THE TRUSTS?             4
SUMMARY OF PORTFOLIOS                              4
RISK FACTORS                                       5
COMPOSITION OF TRUSTS                              7
WHY AND HOW ARE THE BONDS INSURED?                 8
HOW IS THE PUBLIC OFFERING PRICE DETERMINED?       9
MARKET FOR UNITS                                   12
WHAT IS ACCRUED INTEREST?                          12
WHAT ARE ESTIMATED LONG TERM RETURN AND ESTIMATED
CURRENT RETURN?                                    13
HOW WAS THE PRICE OF THE BONDS DETERMINED AT THE
DATE
OF DEPOSIT?                                        13
WHAT IS THE TAX STATUS OF UNITHOLDERS?             14
WHAT ARE NORMAL TRUST OPERATING EXPENSES?          16
WHEN ARE DISTRIBUTIONS MADE TO UNITHOLDERS?        17
ACCUMULATION PLAN                                  17
HOW DETAILED ARE REPORTS TO UNITHOLDERS?           18
UNIT VALUE AND EVALUATION                          18
HOW UNITS OF THE TRUSTS ARE DISTRIBUTED TO THE
PUBLIC                                             18
OWNERSHIP AND TRANSFER OF UNITS                    19
HOW UNITS MAY BE REDEEMED WITHOUT CHARGE           20
HOW UNITS MAY BE PURCHASED BY THE SPONSOR          21
HOW BONDS MAY BE REMOVED FROM THE TRUSTS           21
INFORMATION ABOUT THE TRUSTEE                      22
INFORMATION ABOUT THE SPONSOR                      22
OTHER INFORMATION                                  23

2

NUVEEN Tax-Free Unit Trusts

TOPICAL INDEX                                              PAGE
Accrued Interest                                           12
Accumulation Plan                                          17
                                                     Information
Bond Ratings, Description of                         Supplement
Bonds, Initial Determination of Offering Price             13
Bonds, How Selected                                        4
Bonds, Limited Right of Substitution                       7
Bonds, Removal from a Trust                                21
Call Provisions of Portfolio Bonds                         7
Capital Gains Taxability                                   14
Composition of Trusts                                      7
Dealer Discounts                                           18
Distributions to Unitholders                               17
                                                           Part
Distribution Payment Dates                                 A,17
Distribution of Units to the Public                        18
                                                           Part
Essential Information Regarding the Trusts                 A,13
                                                           Part
Estimated Long Term Return and Estimated Current Return    A,13
Evaluation                                                 18
Expenses for Normal Trust Operation                        16
Indenture, Amendment of                                    23
Indenture, Termination of                                  23
Insurance on the Bonds                                     8
Interest Account Distributions                             Part A
Legal Opinion                                              23
Limitations on Liabilities of Sponsor and Trustee          22
Market for Units                                           12
Minimum Transaction                                        18
Objectives of the Trusts                                   4
Optional Distribution Plan                                 17
Other Information                                          23
Ownership and Transfer of Units                            19
Principal Account Distributions                            17
Public Offering Price of Units                             9
Purchase of Units by Sponsor                               21
Quantity Purchases                                         9
                                                           Part A,
Record Dates                                               17
Redemption of Units Without Charge                         20
Report of Independent Public Accountants                   Part A
Reports to Unitholders                                     18
Risk Factors                                               5
Sales Charge                                               9
Schedules of Investments                                   Part A
Sponsor, Information About                                 22
State Tax Status                                           Part A
Statements of Condition                                    Part A
Successor Trustees and Sponsors                            22
Supplemental Information                                   23
Tax Status of Unitholders                                  14
Trustee, Information About                                 22
Units, Description of                                      4

3

WHAT IS THE NUVEEN TAX-FREE UNIT TRUST?

This Nuveen Tax-Free Unit Trust is one of a series of separate but similar investment companies created by the Sponsor, each of which is designated by a different Series number. The underlying unit investment trusts contained in this Series are combined under one Trust Indenture and Agreement. Specific information regarding this Trust is set forth in Part A of this Prospectus. The various Nuveen Tax-Free Unit Trusts are collectively referred to herein as the "Trusts"; the trusts in which few or none of the Bonds are insured are sometimes referred to as the "Traditional Trusts," the trusts in which all of the Bonds are insured as described herein are sometimes referred to as the "Insured Trusts," and the state trusts (both Traditional and Insured) are sometimes referred to as the "State Trusts." This Series was created under the laws of the State of New York pursuant to a Trust Indenture and Agreement dated the Date of Deposit (the "Indenture") between John Nuveen & Co. Incorporated ("Nuveen" or the "Sponsor") and The Chase Manhattan Bank (the "Trustee").

The Sponsor has deposited with the Trustee delivery statements relating to contracts for the purchase of municipal debt obligations together with funds represented by an irrevocable letter of credit issued by a major commercial bank in the amount, including accrued interest, required for their purchase (or the obligations themselves) (the "Bonds"). See "Schedule of Investments" in Part A of this Prospectus, for a description of the Bonds deposited in a Trust. See "SUMMARY OF PORTFOLIOS" and "RISK FACTORS" for a discussion of zero coupon bonds and stripped obligations included in the Trusts, if any. Some of the delivery statements may relate to contracts for the purchase of "when issued" or other Bonds with delivery dates after the date of settlement for a purchase made on the Date of Deposit. See the "Schedule of Investments" in Part A of this Prospectus and "COMPOSITION OF TRUSTS." For a discussion of the Sponsor's obligations in the event of a failure of any contract for the purchase of any of the Bonds and its limited right to substitute other bonds to replace any failed contract, see "COMPOSITION OF TRUSTS."

Payment of interest on the Bonds in each Insured Trust, and of principal at maturity, is guaranteed under policies of insurance obtained by the Sponsor or by the issuers of the Bonds. (See "WHY AND HOW ARE THE BONDS INSURED?") AS A GENERAL MATTER, NEITHER THE ISSUER NOR THE SPONSOR HAS OBTAINED INSURANCE WITH RESPECT TO THE BONDS IN ANY TRADITIONAL TRUST.

The Trustee has delivered to the Sponsor registered Units which represent ownership of the entire Trust, and which are offered for sale by this Prospectus. Each Unit of a Trust represents a fractional undivided interest in the principal and net income of such Trust in the ratio set forth in "Essential Information" in Part A of this Prospectus. Units may only be sold in states in which they are registered. To the extent that any Units of any Trust are redeemed by the Trustee, the aggregate value of the Trust's assets will decrease by the amount paid to the redeeming Unitholder, but the fractional undivided interest of each unredeemed Unit in such Trust will increase proportionately. The Sponsor will initially, and from time to time thereafter, hold Units in connection with their offering.

WHAT ARE THE OBJECTIVES OF THE TRUSTS?

The objectives of the Trusts are income exempt from Federal income tax and, in the case of State Trusts, where applicable, state income and intangibles taxes, and conservation of capital, through an investment in obligations issued by or on behalf of states and territories of the United States and authorities and political subdivisions thereof, the interest on which is, in the opinion of recognized bond counsel to the issuing governmental authorities, exempt from Federal income tax under existing law and for State Trusts, from certain state income taxes and intangibles taxes, if any, for purchasers who qualify as residents of that State in which Bonds are issued. Insurance guaranteeing the timely payment, when due, of all principal and interest on the Bonds in each Insured Trust has been obtained by the Sponsor or by the issuers of such Bonds from MBIA Insurance Corporation, and as a result of such insurance the Bonds in the Insured Trusts are rated "Aaa" by Moody's, "AAA" by Fitch and/or "AAA" by Standard & Poor's. (See "WHY AND HOW ARE THE BONDS INSURED?") All obligations in each Traditional Trust are rated in the category "A" or better (SP-1, MIG 2 or F-2 or better, respectively, in the case of short term obligations included in a Short Term Traditional Trust) by Standard & Poor's, Moody's and/or Fitch (including provisional or conditional ratings). In addition, certain Bonds in certain Traditional Trusts may be covered by insurance guaranteeing the timely payment, when due, of all principal and interest. There is, of course, no guarantee that the Trusts' objectives will be achieved. For a comparison of net after-tax return for various tax brackets, see the "TAXABLE EQUIVALENT ESTIMATED CURRENT RETURN TABLES" included in the Appendices to the Information Supplement of this Prospectus.

SUMMARY OF PORTFOLIOS

In selecting Bonds for the respective Trusts, the following factors, among others, were considered: (i) the Standard & Poor's, Moody's and/or Fitch ratings of the Bonds (see "WHAT ARE THE OBJECTIVES OF THE TRUSTS?" for a description of minimum rating standards), (ii) the prices of the Bonds relative to other bonds of comparable quality and maturity, (iii) the diversification of Bonds as to purpose of issue and location of issuer, (iv) the maturity dates of the Bonds, and (v) in the case of the Insured Trusts only, the availability of MBIA Insurance Corporation insurance on such Bonds. (See "WHY AND HOW ARE THE BONDS INSURED?")

4

RISK FACTORS

An investment in Units of any Trust should be made with an understanding of the risks that such an investment may entail. Each Trust consists of fixed-rate municipal debt obligations. As such, the value of the debt obligations and therefore of the Units will decline with increases in interest rates. In general, the longer the period until the maturity of a Bond, the more sensitive its value will be to fluctuations in interest rates. The Sponsor cannot predict the extent or timing of such fluctuations and, accordingly, their effect upon the value of the Bonds. Additional risk factors include the ability of the issuer, or, if applicable, an insurer, to make payments of interest and principal when due, "mandatory put" features, early call provisions and the potential for changes in the tax status of the Bonds. As set forth in Part A of this Prospectus, the Trusts may contain or be concentrated in one or more of the types of bonds discussed below. The following paragraphs briefly discuss certain circumstances which may adversely affect the ability of issuers of Bonds held in the portfolio of a Trust to make payments of principal and interest thereon, and which also therefore may adversely affect the ratings of such Bonds. With respect to Insured Trusts, however, because of the insurance obtained by the Sponsor or by the issuers of the Bonds, such changes should not adversely affect an Insured Trust's receipt of principal and interest or the Standard & Poor's "AAA", the Moody's "Aaa" or the Fitch "AAA" ratings of the Bonds in the Insured Trust portfolio. The Bonds described below may be subject to special or extraordinary redemption provisions. For economic risks specific to the individual Trusts, see Part A of this Prospectus and the Appendices to the Information Supplement of this Prospectus.

ESCROW SECURED OBLIGATIONS are typically secured by direct obligations of the U.S. Government or in some cases obligations guaranteed by the U.S. Government placed in an escrow account maintained by an independent trustee until maturity or a predetermined redemption date. These obligations are generally noncallable prior to maturity or the predetermined redemption date. In a few isolated instances, however, bonds which were thought to be escrowed to maturity have been called for redemption prior to maturity.

HEALTH CARE FACILITY OBLIGATIONS are obligations of issuers whose revenues are derived from services provided by hospitals or other health care facilities, including nursing homes. The ability of such issuers to make debt service payments on these obligations is dependent on various factors, including occupancy levels of the facility, demand for services, wages of employees, overhead expenses, competition from other similar providers, government regulation, the cost of malpractice insurance, and the degree of governmental financial assistance, including Medicare and Medicaid.

HOUSING OBLIGATIONS are obligations of issuers whose revenues are primarily derived from mortgage loans on single family residences or housing projects for low to moderate income families. Housing obligations are generally prepayable at any time and therefore their average life will ordinarily be less than their stated maturities. The ability of such issuers to make debt service payments on these obligations is dependent on various factors, including occupancy levels, rental income, mortgage default rates, taxes, operating expenses, governmental regulations and the appropriation of subsidies.

INDUSTRIAL REVENUE OBLIGATIONS are industrial revenue bonds ("IRBs"), including pollution control revenue bonds, which are tax-exempt securities issued by states, municipalities, public authorities or similar entities to finance the cost of acquiring, constructing or improving various industrial projects. Debt service payment on IRBs is dependent upon various factors, including the creditworthiness of the corporate operator of the project and, if applicable, corporate guarantor, revenues generated from the project, expenses associated with the project and regulatory and environmental restrictions.

UTILITY OBLIGATIONS are obligations of issuers whose revenues are primarily derived from the sale of several types of energy, including electric and natural gas. The ability of such issuers to make debt service payments on these obligations is dependent on various factors, including the rates for electricity and natural gas, the demand for electricity and natural gas, the degree of competition, governmental regulation, overhead expenses and variable costs, such as fuel.

TRANSPORTATION FACILITY REVENUE OBLIGATIONS are obligations of issuers which are payable from and secured by revenues derived from the ownership and operation of airports, public transit systems and ports. The ability of issuers to make debt service payments on airport obligations is dependent on the capability of airlines to meet their obligations under use agreements. Due to increased competition, deregulation, increased fuel costs and other factors, many airlines may have difficulty meeting their obligations under these use agreements. Bonds that are secured primarily by the revenue collected by a public transit system typically are additionally secured by a pledge of sales tax receipts collected at the state or local level, or of other governmental financial assistance. The revenue of issuers of transit system obligations will be affected by variations in utilization, which in turn may be affected by the degree of local governmental subsidization, competition from other forms of transportation, and increased costs. Port authorities derive their revenues primarily from fees imposed on ships using the facilities which may fluctuate depending on the local economy and on competition from competing forms of transportation such as air, rail and trucks. The revenues of issuers which derive their payments from bridge, road or tunnel toll revenues could

5

be adversely affected by increases in fuel costs, competition from toll-free vehicular bridges and roads and alternative modes of transportation.

WATER AND/OR SEWERAGE OBLIGATIONS are obligations of issuers whose revenues are payable from user fees from the sale of water and/or sewerage services. The problems of such issuers include the ability to obtain rate increases, population declines, the limitations on operations and increased costs and delays attributable to environmental considerations, the difficulties obtaining new supplies of fresh water, the effect of conservation programs and "no-growth" zoning ordinances.

UNIVERSITY AND COLLEGE REVENUE OBLIGATIONS are obligations of issuers whose revenues are derived mainly from tuition, dormitory revenues, grants and endowments. General problems faced by such issuers include declines in the number of "college" age individuals, possible inability to raise tuitions and fees, the uncertainty of continued receipt of Federal grants and state funding, and government legislation or regulations which may adversely affect the revenues or costs of such issuers.

DEDICATED-TAX SUPPORTED OBLIGATIONS are obligations of issuers which are payable from and secured by tax revenues from a designated source, which revenues are pledged to secure the bonds. The various types of Bonds described below differ in structure and with respect to the rights of the bondholders to the underlying property. Each type of dedicated-tax supported Bond has distinct risks, only some of which are set forth below. One type of dedicated-tax supported Bond is secured by the incremental tax received on either real property or on sales within a specifically defined geographical area; such tax generally will not provide bondholders with a lien on the underlying property or revenues. Another type of dedicated-tax supported Bond is secured by a special tax levied on real property within a defined geographical area in such a manner that the tax is levied on those who benefit from the project; such bonds typically provide for a statutory lien on the underlying property for unpaid taxes. A third type of dedicated-tax supported Bond may be secured by a tax levied upon the manufacture, sale or consumption of commodities or upon the license to pursue certain occupations or upon corporate privileges within a taxing jurisdiction. As to any of these types of Bonds, the ability of the designated revenues to satisfy the interest and principal payments on such bonds may be affected by changes in the local economy, the financial success of the enterprise responsible for the payment of the taxes, the value of any property on which taxes may be assessed and the ability to collect such taxes in a timely fashion. Each of these factors will have a different affect on each distinct type of dedicated-tax supported bonds.

MUNICIPAL LEASE OBLIGATIONS are obligations that are secured by lease payments of a governmental entity and are normally subject to annual budget appropriations of the leasing governmental entity. A governmental entity that enters into such a lease agreement cannot obligate future governments to appropriate for and make lease payments but covenants to take such action as is necessary to include any lease payments due in its budgets and to make the appropriations therefor. A governmental entity's failure to appropriate for and to make payments under its lease obligation could result in insufficient funds available for payment of the obligations secured thereby.

ORIGINAL ISSUE DISCOUNT OBLIGATIONS AND STRIPPED OBLIGATIONS are bonds which were issued with nominal interest rates less than the rates then offered by comparable securities and as a consequence were originally sold at a discount from their face, or par, values. In a stable interest rate environment, the market value of an original issue discount bond would tend to increase more slowly in early years and in greater increments as the bond approached maturity.

Certain of the original issue discount obligations in a Trust may be zero coupon bonds. Zero coupon bonds do not provide for the payment of any current interest; the buyer receives only the right to receive a final payment of the face amount of the bond at its maturity. Zero coupon bonds are subject to substantially greater price fluctuations during periods of changing market interest rates than are securities of comparable quality that pay interest currently.

Original issue discount obligations, including zero coupon bonds, may be subject to redemption at prices based on the issue price plus the amount of original issue discount accreted to redemption (the "accreted value") plus, if applicable, some premium. Pursuant to such call provisions, an original issue discount bond may be called prior to its maturity date at a price less than its face value. See the "Schedule of Investments" appearing in Part A of this Prospectus for more information about the call provisions of portfolio Bonds.

Certain of the Bonds in a Trust may be stripped obligations, which represent evidences of ownership with respect to either the principal amount of or a payment of interest on a tax-exempt obligation ("Stripped Obligations"). Each Stripped Obligation has been purchased at a discount from the amount payable at maturity. A Stripped Obligation therefore has economic characteristics similar to zero coupon bonds, as described above.

Unitholders should consult their own tax advisers with respect to the state and local tax consequences of owning original issue discount bonds or Stripped Obligations. Under applicable provisions governing determination of state and local taxes, interest on original issue discount obligations or Stripped Obligations may be deemed to be received in the year of accrual even though there is no corresponding cash payment.

6

Certain bonds may carry a "mandatory put" (also referred to as a "mandatory tender" or "mandatory repurchase") feature pursuant to which the holder of such bonds will receive payment of the full principal amount thereof on a stated date prior to the maturity date unless such holder affirmatively acts to retain the bond. The Trustee does not have the authority to act to retain Bonds with such features; accordingly, it will receive payment of the full principal amount of any such Bonds on the stated put date and such date is therefore treated as the maturity date of such Bonds in selecting Bonds for the respective Trusts and for purposes of calculating the average maturity of the Bonds in any Trust.

COMPOSITION OF TRUSTS

Each Trust initially consists of delivery statements relating to contracts to purchase Bonds (or of such Bonds) as are listed under "Schedule of Investments" in Part A of this Prospectus and, thereafter, of such Bonds as may continue to be held from time to time (including certain securities deposited in the Trust in substitution for Bonds not delivered to a Trust or in exchange or substitution for Bonds upon certain refundings), together with accrued and undistributed interest thereon and undistributed cash realized from the disposition of Bonds.

"WHEN-ISSUED" AND "DELAYED DELIVERY" TRANSACTIONS. The contracts to purchase Bonds delivered to the Trustee represent an obligation by issuers or dealers to deliver Bonds to the Sponsor for deposit in the Trusts. Certain of the contracts relate to Bonds which have not been issued as of the Date of Deposit and which are commonly referred to as "when issued" or "when, as and if issued" Bonds. Although the Sponsor believes it unlikely, if such Bonds, or replacement bonds described below, are not acquired by a Trust or if their delivery is delayed, the Estimated Current Returns and Estimated Long Term Returns shown in Part A of this Prospectus may be reduced. Certain of the contracts for the purchase of Bonds provide for delivery dates after the date of settlement for purchases made on the Date of Deposit. Interest on such "when issued" and "delayed delivery" Bonds accrues to the benefit of Unitholders commencing with the first settlement date for the Units. However, in the opinion of counsel, Unitholders who purchase their Units prior to the date such Bonds are actually delivered to the Trustee must reduce the tax basis of their Units for interest accruing on such Bonds during the interval between their purchase of Units and the delivery of the Bonds because such amounts constitute a return of principal. As a result of such adjustment, the Estimated Current Returns set forth in Part A of this Prospectus (which are based on the Public Offering Price as of the business day prior to the Date of Deposit) may be slightly lower than that which Unitholders will receive after the first year, assuming the Portfolio does not change and estimated annual expense does not vary from that set forth under "Essential Information" in Part A of this Prospectus. Those Bonds in each Trust purchased with delivery dates after the date of settlement for purchases made on the Date of Deposit are so noted in the "Schedule of Investments" in

Part A of this Prospectus.

LIMITED REPLACEMENT OF CERTAIN BONDS. Neither the Sponsor nor the Trustee shall be liable in any way for any default, failure or defect in any Bond. In the event of a failure to deliver any Bond that has been purchased for a Trust under a contract, including those Bonds purchased on a when, as and if issued basis ("Failed Bonds"), the Sponsor is authorized under the Indenture to direct the Trustee to acquire other specified Bonds ("Replacement Bonds") to make up the original corpus of the Trust within 20 days after delivery of notice of the failed contract and the cost to the Trust (exclusive of accrued interest) may not exceed the amount of funds reserved for the purchase of the Failed Bonds. The Replacement Bonds must satisfy the criteria previously described for the Trusts and shall be substantially identical to the Failed Bonds they replace in terms of (i) the exemption from federal and state taxation; (ii) maturity and;
(iii) cost to the Trust. In addition, Replacement Bonds shall not be "when, as and if issued" Bonds. Whenever a Replacement Bond has been acquired for a Trust, the Trustee shall, within five days after the delivery thereof, mail or deliver a notice of such acquisition to all Unitholders of the Trust involved. Once the original corpus of the Trust is acquired, the Trustee will have no power to vary the investment of the Trust.

To the extent Replacement Bonds are not acquired, the Sponsor shall refund to all Unitholders of the Trust involved the sales charge attributable to such Failed Bonds not replaced, and the principal and accrued interest attributable to such Bonds shall be distributed not more than 30 days after the determination of such failure or at such earlier time as the Trustee in its sole discretion deems to be in the interest of the Unitholders. Any such accrued interest paid to Unitholders will be paid by the Sponsor and, accordingly, will not be treated as tax-exempt income. In the event Failed Bonds in a Trust could not be replaced, the Net Annual Interest Income per Unit for such Trust would be reduced and the Estimated Current Return thereon might be lowered.

SALE, MATURITY AND REDEMPTION OF BONDS. Certain of the Bonds may from time to time under certain circumstances be sold or redeemed or will mature in accordance with their terms. The proceeds from such events will be used to pay for Units redeemed or distributed to Unitholders and not reinvested; accordingly, no assurance can be given that a Trust will retain for any length of time its present size and composition.

All of the Bonds in each Trust are subject to being called or redeemed in whole or in part prior to their stated maturities pursuant to the optional redemption provisions described in the "Schedule of Investments" in Part A of this Prospectus and in most cases pursuant to a sinking fund or special or extraordinary redemption provisions. See

7

the discussion of the various types of bond issues, above, for information on the call provisions of such bonds, particularly single family mortgage revenue bonds.

The exercise of redemption or call provisions will (except to the extent the proceeds of the called Bonds are used to pay for Unit redemptions) result in the distribution of principal and may result in a reduction in the amount of subsequent interest distributions; it may also affect the current return on Units of the Trust involved. The exercise of redemption or call provisions is more likely to occur in situations where the Bonds have an offering side evaluation which represents a premium over par (as opposed to a discount from par). (In the case of original issue discount bonds, such redemption is generally to be made at the issue price plus the amount of original issue discount accreted to the date of redemption; such price is referred to herein as "accreted value"). Because Bonds may have been valued at prices above or below par value or the then current accreted value at the time Units were purchased, Unitholders may realize gain or loss upon the redemption of portfolio Bonds.
(See "WHAT IS THE TAX STATUS OF UNITHOLDERS?" and "WHEN ARE DISTRIBUTIONS MADE
TO UNITHOLDERS?" in Part B and the "Schedule of Investments" in Part A of this Prospectus.)

CERTAIN TAX MATTERS; LITIGATION. Certain of the Bonds in a Trust's portfolio may be subject to continuing requirements regarding the actual use of bond proceeds, the manner of operation of the project financed from bond proceeds or the rebate of excess earnings on bond proceeds, any of which may affect the exemption of interest on such Bonds from Federal income taxation. Although at the time of issuance of each of the Bonds in each Trust an opinion of bond counsel was rendered as to the exemption of interest on such obligations from Federal income taxation, and the issuers covenanted to comply with all requirements necessary to retain the tax-exempt status of the Bonds, there can be no assurance that the respective issuers or other obligors on such obligations will fulfill the various continuing requirements established upon issuance of the Bonds. A failure to comply with such requirements may cause a determination that interest on such obligations is subject to Federal income taxation, perhaps even retroactively from the date of issuance of such Bonds, thereby reducing the value of the Bonds and subjecting Unitholders to unanticipated tax liabilities.

To the best knowledge of the Sponsor, there is no litigation pending as of the Date of Deposit in respect of any Bonds which might reasonably be expected to have a material adverse effect on any of the Trusts. It is possible that after the Date of Deposit, litigation may be initiated with respect to Bonds in any Trust. Any such litigation may affect the validity of such Bonds or the tax-exempt nature of the interest thereon, but while the outcome of litigation of such nature can never be entirely predicted, the opinions of bond counsel to the issuer of each Bond on the date of issuance state that such Bonds were validly issued and that the interest thereon is, to the extent indicated, exempt from Federal income tax.

WHY AND HOW ARE THE BONDS INSURED?

Insurance guaranteeing the timely payment, when due, of all principal and interest on the Bonds in each Insured Trust has been obtained by the Sponsor or by the issuers or underwriters of the Bonds from the MBIA Insurance Corporation (the "Insurer"). Certain of the Bonds in an Insured Trust may be covered by a policy or policies of insurance obtained by the issuers or underwriters of the Bonds from Municipal Bond Insurance Association (the "Association") or Bond Investors Guaranty Insurance Company ("BIG"). The claims-paying ability of both the Insurer and the Association was rated "AAA Prime Grade" by Standard & Poor's. Moody's rates all bond issues insured by either the Insurer or the Association "Aaa" and short-term loans "MIG 1." Fitch, upon request, rates all bond issues insured by the Insurer or the Association "AAA" and short-term loans "F-1." All such ratings designate the highest quality. The Insurer has issued a policy or policies of insurance covering each of the Bonds in the Insured Trusts, each policy to remain in force until the payment in full of such Bonds and whether or not the Bonds continue to be held by an Insured Trust. By the terms of each policy the Insurer will unconditionally guarantee to the holders or owners of the Bonds the payment, when due, required of the issuer of the Bonds of an amount equal to the principal of and interest on the Bonds as such payments shall become due but not be paid (except that in the event of any acceleration of the due date of principal by reason of mandatory or optional redemption, default or otherwise, the payments guaranteed will be made in such amounts and at such times as would have been due had there not been an acceleration).

Insurance guaranteeing the timely payment, when due, of all principal and interest on certain Bonds in a Traditional Trust may have been obtained by the Sponsor, issuer or underwriter of the particular Bonds involved or by another party. Such insurance, which provides coverage substantially the same as that obtained with respect to Bonds in Insured Trusts as described above, is effective so long as the insured Bond is outstanding and the insurer remains in business. Insurance relates only to the particular Bond and not to the Units offered hereby or to their market value. Insured Bonds have received a rating of "Aaa" by Moody's, "AAA" by Fitch and/or "AAA" by Standard & Poor's in recognition of such insurance.

If a Bond in a Traditional Trust is insured, the "Schedule of Investments" appearing in Part A of this Prospectus will identify the insurer. There can be no assurance that any insurer listed therein will be able to satisfy its commitments in the event claims are made in the future. However, Standard & Poor's, Fitch and/or Moody's have rated the claims-paying ability of each insurer "AAA," "AAA" or "Aaa," respectively.

8

The Insurer is the principal operating subsidiary of MBIA, Inc., a New York Stock Exchange listed company. MBIA, Inc. is not obligated to pay the debts of or claims against the Insurer. The Insurer is domiciled in the State of New York and licensed to do business in and subject to regulation under the laws of all 50 states, the District of Columbia, the Commonwealth of Puerto Rico, the Commonwealth of the Northern Mariana Islands, the Virgin Islands of the United States and the Territory of Guam. The Insurer has two European branches, one in the Republic of France and the other in the Kingdom of Spain. New York has laws prescribing minimum capital requirements, limiting classes and concentrations of investments and requiring the approval of policy rates and forms. State laws also regulate the amount of both the aggregate and individual risks that may be insured, the payment of dividends by the insurer, changes in control and transactions among affiliates. Additionally, the Insurer is required to maintain contingency reserves on its liabilities in certain amounts and for certain periods of time.

As of December 31, 1995 the Insurer had admitted assets of $3.8 billion (audited), total liabilities of $2.5 billion (audited), and total capital and surplus of $1.3 billion (audited) determined in accordance with statutory accounting practices prescribed or permitted by insurance regulatory authorities. As of September 30, 1996, the Insurer had admitted assets of $4.3 billion (unaudited), total liabilities of $2.9 billion (unaudited), and total capital and surplus of $1.4 billion (unaudited) determined in accordance with statutory accounting practices prescribed or permitted by insurance regulatory authorities.

The Association is comprised of the five insurance companies set forth in the following table, which provides certain unaudited financial information with respect to each of the five insurance companies comprising the Association.

MUNICIPAL BOND INSURANCE ASSOCIATION
FIVE MEMBER COMPANIES ASSETS AND POLICYHOLDERS' SURPLUS (UNAUDITED)
AS OF MARCH 31, 1995.
(000'S OMITTED)

                                                                               NEW YORK      NEW YORK       NEW YORK
                                                                              STATUTORY     STATUTORY    POLICYHOLDERS
                                                                                ASSETS     LIABILITIES      SURPLUS
                                                                             ------------  ------------  --------------
The AEtna Casualty & Surety Company........................................  $ 10,225,604  $  8,312,158  $   1,913,446
Fireman's Fund Insurance Company...........................................     7,126,217     5,116,059      2,010,158
The Travelers Indemnity Company............................................    10,461,356     8,654,130      1,807,226
CIGNA Property and Casualty Company (formerly Aetna Insurance Company).....     4,260,177     3,637,513        622,664
The Continental Insurance Company..........................................     3,060,583     2,380,723        679,860
                                                                             ------------  ------------  --------------
        Total..............................................................  $ 35,133,937  $ 28,100,583  $   7,033,354
                                                                             ------------  ------------  --------------
                                                                             ------------  ------------  --------------

Insurance companies are subject to extensive regulation and supervision where they do business by state insurance commissioners who regulate the standards of solvency which must be maintained, the nature of and limitations on investments, reports of financial condition, and requirements regarding reserves for unearned premiums, losses and other matters. A significant portion of the assets of insurance companies is required by law to be held in reserve against potential claims on policies and is not available to general creditors. Although the federal government does not regulate the business of insurance, federal initiatives including pension regulation, controls on medical care costs, minimum standards for no-fault automobile insurance, national health insurance, tax law changes affecting life insurance companies and repeal of the antitrust exemption for the insurance business can significantly impact the insurance business.

The above ratings are not recommendations to buy, sell or hold the Bonds, and such ratings may be subject to revision or withdrawal at any time by the rating agencies. Any downward revision or withdrawal of either or both ratings may have an adverse effect on the market price of the Bonds. See the Information Supplement--for further information concerning insurance.

Because the insurance on the Bonds, if any, will be effective so long as the Bonds are outstanding, such insurance will be taken into account in determining the market value of the Bonds and therefore some value attributable to such insurance will be included in the value of the Units of the Insured Trusts. The insurance does not, however, guarantee the market value of the Bonds or of the Units.

HOW IS THE PUBLIC OFFERING PRICE DETERMINED?

The Public Offering Price of the Units of each Trust is equal to the Trustee's determination of the aggregate OFFERING prices of the Bonds deposited therein (minus any advancement to the principal account of the Trust made by the Trustee) plus a sales charge set forth in "Essential Information" in Part A of this Prospectus, in each case adding to the total thereof cash held by the Trust, if any, and dividing the sum so obtained by the number of Units outstanding in the Trust. See "UNIT VALUE AND EVALUATION."

The sales charge applicable to quantity purchases is reduced on a graduated scale for sales to any purchaser of at least $50,000 or 500 Units and will be applied on whichever basis is more favorable to the purchaser. For purposes of

9

calculating the applicable sales charge, purchasers who have indicated their intent to purchase a specified amount of Units of any Trust in the primary or secondary offering period by executing and delivering a letter of intent to the Sponsor, which letter of intent must be in a form acceptable to the Sponsor and shall have a maximum duration of thirteen months, will be eligible to receive a reduced sales charge according to the following tables based on the amount of intended aggregate purchases as expressed in the letter of intent. Due to administrative limitations and in order to permit adequate tracking, the only secondary market purchases that will be permitted to be applied toward the intended specified amount and that will receive the corresponding reduced sales charge are those Units that are acquired through or from the Sponsor. By establishing a letter of intent, a Unitholder agrees that the first purchase of Units following the execution of such letter of intent will be at least 5% of the total amount of the intended aggregate purchases expressed in such Unitholder's letter of intent. Further, through the establishment of the letter of intent, such Unitholder agrees that Units representing 5% of the total amount of the intended purchases will be held in escrow by the Trustee pending completion of these purchases. All distributions on Units held in escrow will be credited to such Unitholder's account. If total purchases prior to the expiration of the letter of intent period equal or exceed the amount specified in a Unitholder's letter of intent, the Units held in escrow will be transferred to such Unitholder's account. A Unitholder who purchases Units during the letter of intent period in excess of the number of Units specified in a Unitholder's letter of intent, the amount of which would cause the Unitholder to be eligible to receive an additional sales charge reduction, will be allowed such additional sales charge reduction on the purchase of Units which caused the Unitholder to reach such new breakpoint level and on all additional purchases of Units during the letter of intent period. If the total purchases are less than the amount specified, the Unitholder involved must pay the Sponsor an amount equal to the difference between the amounts paid for these purchases and the amounts which would have been paid if the higher sales charge had been applied; the Unitholder will, however, be entitled to any reduced sales charge qualified for by reaching any lower breakpoint level. If such Unitholder does not pay the additional amount within 20 days after written request by the Sponsor or the Unitholder's securities representative, the Sponsor will instruct the Trustee to redeem an appropriate number of the escrowed Units to meet the required payment. By establishing a letter of intent, a Unitholder irrevocably appoints the Sponsor as attorney to give instructions to redeem any or all of such Unitholder's escrowed Units, with full power of substitution in the premises. A Unitholder or his securities representative must notify the Sponsor whenever such Unitholder makes a purchase of Units that he wishes to be counted towards the intended amount. Sales charges during the primary offering period are as follows:

                                                                                                              NATIONAL AND
                                                                                                                 STATE
                                          NATIONAL AND STATE LONG TERM        LONG INTERMEDIATE TRUSTS        INTERMEDIATE
                                                     TRUSTS                                                      TRUSTS
                                          -----------------------------     -----------------------------     ------------
                                            PERCENT          PERCENT          PERCENT          PERCENT          PERCENT
                                               OF             OF NET             OF             OF NET             OF
                                            OFFERING          AMOUNT          OFFERING          AMOUNT          OFFERING
            NUMBER OF UNITS*                 PRICE           INVESTED          PRICE           INVESTED          PRICE
- ----------------------------------------  ------------     ------------     ------------     ------------     ------------
Less than 500...........................         4.90 %           5.152%           4.25 %           4.439%           3.90%
500 but less than 1,000.................         4.75             4.987            4.15             4.330            3.70
1,000 but less than 2,500...............         4.50             4.712            3.85             4.004            3.50
2,500 but less than 5,000...............         4.25             4.439            3.60             3.734            3.25
5,000 but less than 10,000..............         3.50             3.627            3.35             3.466            3.00
10,000 but less than 25,000.............         3.00             3.093            3.00             3.093            2.75
25,000 but less than 50,000.............         2.50             2.564            2.50             2.564            2.50
50,000 or more..........................         2.00             2.041            2.00             2.041            2.00


                                            PERCENT
                                             OF NET
                                             AMOUNT
            NUMBER OF UNITS*                INVESTED
- ----------------------------------------  ------------
Less than 500...........................         4.058%
500 but less than 1,000.................         3.842
1,000 but less than 2,500...............         3.627
2,500 but less than 5,000...............         3.359
5,000 but less than 10,000..............         3.093
10,000 but less than 25,000.............         2.828
25,000 but less than 50,000.............         2.564
50,000 or more..........................         2.041

                                            NATIONAL AND STATE SHORT
                                               INTERMEDIATE TRUSTS                SHORT TERM TRUSTS
                                          -----------------------------     -----------------------------
                                            PERCENT          PERCENT          PERCENT          PERCENT
                                               OF             OF NET             OF             OF NET
                                            OFFERING          AMOUNT          OFFERING          AMOUNT
            NUMBER OF UNITS*                 PRICE           INVESTED          PRICE           INVESTED
- ----------------------------------------  ------------     ------------     ------------     ------------
Less than 500...........................         3.00 %           3.093%           2.50 %           2.564%
500 but less than 1,000.................         2.80             2.881            2.30             2.354
1,000 but less than 2,500...............         2.60             2.670            2.10             2.145
2,500 but less than 5,000...............         2.35             2.407            1.85             1.885
5,000 but less than 10,000..............         2.10             2.145            1.60             1.626
10,000 but less than 25,000.............         1.85             1.885            1.35             1.368
25,000 but less than 50,000.............         1.80             1.833            1.25             1.266
50,000 or more..........................         1.50             1.523            1.15             1.163

*Breakpoint sales charges are computed both on a dollar basis and on the basis of the number of Units purchased, using the equivalent of 500 Units to $50,000, 2,500 Units to $250,000 etc., and will be applied on that basis which is more favorable to the purchaser.

For "secondary market" sales the Public Offering Price per Unit of each Trust is determined by adding to the Trustee's determination of the BID price of each Bond in the Trust a sales charge determined in accordance with the table set forth below based upon the number of years remaining to the maturity of each such Bond. See "UNIT VALUE AND EVALUATION." The effect of this method of sales charge calculation will be that different sales charge rates will be applied to the various Bonds in a Trust portfolio based upon the maturities of such Bonds. As shown, the

10

sales charge on Bonds in each maturity range (and therefore the aggregate sales charge on the purchase) is reduced with respect to purchases of at least $50,000 or 500 Units:

                                                                       AMOUNT OF PURCHASE*
                              -----------------------------------------------------------------------------------------------------
                                            $50,000      $100,000     $250,000     $500,000    $1,000,000   $2,500,000
                                UNDER          TO           TO           TO           TO           TO           TO       $5,000,000
YEARS TO MATURITY              $50,000      $99,999      $249,999     $499,999     $999,999    $2,499,999   $4,999,999    OR MORE
- ----------------------------------------   ----------   ----------   ----------   ----------   ----------   ----------   ----------
Less than 1...................         0           0            0            0            0            0            0            0
1 but less than 2.............     1.523 %     1.446 %      1.369 %      1.317 %      1.215 %      1.061 %       .900 %       .750 %
2 but less than 3.............     2.041       1.937        1.833        1.729        1.626        1.420        1.225        1.030
3 but less than 4.............     2.564       2.433        2.302        2.175        2.041        1.781        1.546        1.310
4 but less than 5.............     3.093       2.961        2.828        2.617        2.459        2.175        1.883        1.590
5 but less than 7.............     3.627       3.433        3.239        3.093        2.881        2.460        2.165        1.870
7 but less than 10............     4.167       3.951        3.734        3.520        3.239        2.828        2.489        2.150
10 but less than 13...........     4.712       4.467        4.221        4.004        3.788        3.253        2.842        2.430
13 but less than 16...........     5.263       4.988        4.712        4.439        4.167        3.627        3.169        2.710
16 or more....................     5.820       5.542        5.263        4.987        4.603        4.004        3.500        3.000

*Breakpoint sales charges are computed both on a dollar basis and on the basis of the number of Units purchased, using the equivalent of 500 Units to $50,000, 2,500 Units to $250,000, etc., and will be applied on that basis which is more favorable to the purchaser.

The secondary market sales charges above are expressed as a percent of the net amount invested; expressed as a percent of the Public Offering Price, the maximum sales charge on a Trust, for instance one consisting entirely of Bonds with 16 years or more to maturity, would be 5.50% (5.820% of the net amount invested). The actual secondary market sales charge included in the Public Offering Price of any particular Trust will depend on the maturities of the Bonds in the portfolio of such Trust.

Pursuant to the terms of the Indenture, the Trustee may terminate a Trust if the net asset value of such Trust, as shown by any evaluation, is less than 20% of the original principal amount of the Trust.

At all times while Units are being offered for sale, the Sponsor will appraise or cause to be appraised daily the value of the underlying Bonds in each Trust as of 4:00 p.m. eastern time, or as of any earlier closing time on a day on which the New York Stock Exchange (the "Exchange") is scheduled in advance to close at such earlier time and will adjust the Public Offering Price of the Units commensurate with such appraisal. Such Public Offering Price will be effective for all orders received by a dealer or the Sponsor at or prior to 4:00 p.m. eastern time on each such day or as of any earlier closing time on a day on which the Exchange is scheduled in advance to close at such earlier time. Orders received after that time, or on a day when the Exchange is closed for a scheduled holiday or weekend, will be held until the next determination of price.

Accrued interest from the preceding Record Date to, but not including, the settlement date of the transaction (three business days after purchase) will be added to the Public Offering Price to determine the purchase price of Units. See "WHAT IS ACCRUED INTEREST?"

The graduated sales charges set forth above will apply on all applicable purchases of Nuveen investment company securities on any one day by the same purchaser in the amounts stated, and for this purpose purchases of this Series will be aggregated with concurrent purchases of any other Series or of shares of any open-end management investment company of which the Sponsor is principal underwriter and with respect to the purchase of which a sales charge is imposed. Purchases by or for the account of an individual and his or her spouse and children under 21 years of age ("immediate family members") will be aggregated to determine the applicable sales charge. The graduated sales charges are also applicable to a trustee or other fiduciary purchasing securities for a single trust estate or single fiduciary account. Units may be purchased at the Public Offering Price without a sales charge by officers or directors and by bona fide, full-time employees of Nuveen, Nuveen Advisory Corp., Nuveen Institutional Advisory Corp. and The John Nuveen Company, including in each case these individuals and their immediate family members (as defined above).

Units may be purchased in the primary market with sales charges of 1.70% of the Public Offering Price for National and State Long Term Trusts, 1.35% of the Public Offering Price for Long Intermediate Trusts, 1.20% of the Public Offering Price for National and State Intermediate Trusts, 1.0% of the Public Offering Price for National and State Short Intermediate Trusts and 1.0% of the Public Offering Price for Short Term Trusts by (1) investors who purchase Units through registered investment advisers, certified financial planners and registered broker-dealers who in each case either charge periodic fees for financial planning, investment advisory or asset management services, or provide such services in connection with the establishment of an investment account for which a comprehensive "wrap fee" charge is imposed, (2) bank trust departments investing funds over which they exercise exclusive discretionary investment authority and that are held in a fiduciary, agency, custodial or similar capacity, (3) any person who for at least 90 days, has been an officer, director or bona fide employee of any firm offering Units for sale to investors or their immediate family members (as defined above) and (4) officers and directors of bank holding companies that make Units available directly or through subsidiaries or bank affiliates (collectively, the "Discounted Purchases"). In addition, such investors may purchase Units in the secondary market at the Public Offering Price for non-breakpoint purchases minus the concession the Sponsor typically allows to brokers and dealers for

11

non-breakpoint purchases. Notwithstanding anything to the contrary in this Prospectus, investors who purchase Units as described in this paragraph will not receive sales charge reductions for quantity purchases.

The initial or primary Public Offering Price of the Units in each Trust is based upon a pro rata share of the OFFERING prices per Unit of the Bonds in such Trust plus the applicable sales charge. The secondary market Public Offering Price of each Trust is based upon a pro rata share of the BID prices per Unit of the Bonds in such Trust plus the applicable sales charge. The OFFERING prices of Bonds in a Trust may be expected to average between 1/2% to 2% more than the BID prices of such Bonds. The difference between the bid side evaluation and the offering side evaluation of the Bonds in each Trust on the business day prior to the Date of Deposit is shown in the discussion of each Trust portfolio.

Whether or not Units are being offered for sale, the Sponsor will determine the aggregate value of each Trust as of 4:00 p.m. eastern time: (i) on each June 30 or December 31 (or, if such date is not a business day, the last business day prior thereto), (ii) on any day on which a Unit is tendered for redemption (or the next succeeding business day if the date of tender is a non-business day) and (iii) at such other times as may be necessary. For this purpose, a "business day" shall be any day on which the Exchange is normally open. (See "UNIT VALUE AND EVALUATION.")

MARKET FOR UNITS

During the initial public offering period, the Sponsor intends to offer to purchase Units of each Trust at a price equivalent to the pro rata share per Unit of the OFFERING prices of the Bonds in such Trust (plus accrued interest). Afterward, although it is not obligated to do so, the Sponsor intends to maintain a secondary market for Units of each Trust at its own expense and continuously to offer to purchase Units of each Trust at prices, subject to change at any time, which are based upon the BID prices of Bonds in the respective portfolios of the Trusts. UNITHOLDERS WHO WISH TO DISPOSE OF THEIR UNITS SHOULD INQUIRE OF THE TRUSTEE OR THEIR BROKER AS TO THE CURRENT REDEMPTION PRICE. (See "HOW UNITS MAY BE REDEEMED WITHOUT CHARGE?") In connection with its secondary marketmaking activities, the Sponsor may from time to time enter into secondary market joint account agreements with other brokers and dealers. Pursuant to such an agreement, the Sponsor will purchase Units from the broker or dealer at the bid price and will place the Units into a joint account managed by the Sponsor; sales from the account will be made in accordance with the then current prospectus and the Sponsor and the broker or dealer will share profits and losses in the joint account in accordance with the terms of their joint account agreement.

Certificates, if any, for Units are delivered to the purchaser as promptly after the date of settlement (three business days after purchase) as the Trustee can complete the mechanics of registration, normally within 48 hours after registration instructions are received. Purchasers of Units to whom Certificates are issued will be unable to exercise any right of redemption until they have received their Certificates, properly endorsed for transfer. (See "HOW UNITS MAY BE REDEEMED WITHOUT CHARGE?")

WHAT IS ACCRUED INTEREST?

Accrued interest is the accumulation of unpaid interest on a bond from the last day on which interest thereon was paid. Interest on Bonds in each Trust is accounted for daily on an accrual basis. For this reason, the purchase price of Units of a Trust will include not only the Public Offering Price but also the proportionate share of accrued interest to the date of settlement. Accrued interest does not include accrual of original issue discount on zero coupon bonds, Stripped Obligations or other original issue discount bonds. Interest accrues to the benefit of Unitholders commencing with the settlement date of their purchase transaction.

In an effort to reduce the amount of accrued interest that investors would have to pay in addition to the Public Offering Price, the Trustee has agreed to advance to each Trust the amount of accrued interest due on the Bonds as of the Date of Deposit (which has been designated the first Record Date for all plans of distribution). This accrued interest will be paid to the Sponsor as the holder of record of all Units on the Date of Deposit. Consequently, the amount of accrued interest to be added to the Public Offering Price of Units will include only accrued interest from the Date of Deposit to, but not including, the date of settlement of the investor's purchase (three business days after purchase), less any distributions from the related Interest Account. The Trustee will recover its advancements (without interest or other cost to the Trusts) from interest received on the Bonds deposited in each Trust.

The Trustee has no cash for distribution to Unitholders until it receives interest payments on the Bonds in the Trusts. Since municipal bond interest is accrued daily but paid only semi-annually, during the initial months of the Trusts, the Interest Accounts, consisting of accrued but uncollected interest and collected interest (cash), will be predominantly the uncollected accrued interest that is not available for distribution. However, due to advances by the Trustee, the Trustee will provide a first distribution between approximately 30 and 60 days after the Date of Deposit. Assuming each Trust retains its original size and composition and expenses and fees remain the same, annual interest collected and distributed will approximate the estimated Net Annual Interest Income stated herein. However, the amount of accrued interest at any point in time will be greater than the amount that the Trustee will have actually received and distributed to the Unitholders. Therefore, there will always remain an item of accrued interest that is included in the Purchase Price and the redemption price of the Units.

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Interest is accounted for daily and a proportionate share of accrued and undistributed interest computed from the preceding Record Date is added to the daily valuation of each Unit of each Trust. (See Part A of this Prospectus and "WHEN ARE DISTRIBUTIONS MADE TO UNITHOLDERS?") As Bonds mature, or are redeemed or sold, the accrued interest applicable to such bonds is collected and subsequently distributed to Unitholders. Unitholders who sell or redeem all or a portion of their Units will be paid their proportionate share of the remaining accrued interest to, but not including, the third business day following the date of sale or tender.

WHAT ARE ESTIMATED LONG TERM RETURN AND ESTIMATED CURRENT RETURN?

The Estimated Long Term Return for each Trust is a measure of the return to the investor expected to be earned over the estimated life of the Trust. The Estimated Long Term Return represents an average of the yields to maturity (or call) of the Bonds in the Trust's portfolio calculated in accordance with accepted bond practice and adjusted to reflect expenses and sales charges. Under accepted bond practice, tax-exempt bonds are customarily offered to investors on a "yield price" basis, which involves computation of yield to maturity or to an earlier call date (whichever produces the lower yield), and which takes into account not only the interest payable on the bonds but also the amortization or accretion of any premium over, or discount from, the par (maturity) value inherent in the bond's purchase price. In the calculation of Estimated Long Term Return, the average yield for a Trust's portfolio is derived by weighting each Bond's yield by the market value of the Bond and by the amount of time remaining to the date to which the Bond is priced. This weighted average yield is then adjusted to reflect estimated expenses, is compounded, and is reduced by a factor which represents the amortization of the sales charge over the expected average life of a Trust. The Estimated Long Term Return calculation does not take into account the effect of a first distribution which may be less than a regular distribution or may be paid at some point after 30 days (or a second distribution which may be less than a normal distribution for Unitholders who choose quarterly or semi-annual plans of distribution), and it also does not take into account the difference in timing of payments to Unitholders who choose quarterly or semi-annual plans of distribution, each of which will reduce the return.

Estimated Current Return is computed by dividing the Net Annual Interest Income per Unit by the Public Offering Price. In contrast to Estimated Long Term Return, Estimated Current Return does not reflect the amortization of premium or accretion of discount, if any, on the Bonds in a Trust's portfolio. Net Annual Interest Income per Unit is calculated by dividing the annual interest income to a Trust, less estimated expenses, by the number of Units outstanding.

Net Annual Interest Income per Unit, used to calculate Estimated Current Return, will vary with changes in fees and expenses of the Trustee and the Evaluator and with the redemption, maturity, exchange or sale of Bonds. A Unitholder's actual return may vary significantly from the Estimated Long-Term Return, based on their holding period, market interest rate changes, other factors affecting the prices of individual bonds in the portfolio, and differences between the expected remaining life of portfolio bonds and the actual length of time that they remain in a Trust; such actual holding periods may be reduced by termination of a Trust, as described in "OTHER INFORMATION." Since both the Estimated Current Return and the Estimated Long Term Return quoted herein are based on the market value of the underlying Bonds on the business day prior to the Date of Deposit, subsequent calculations of these performance measures will reflect the then current market value of the underlying Bonds and may be higher or lower. The Sponsor will provide estimated cash flow information relating to a Trust without charge to each potential investor in a Trust who receives this prospectus and makes an oral or written request to the Sponsor for such information.

A portion of the monies received by a Trust may be treated, in the first year only, as a return of principal due to the inclusion in the Trust portfolio of "when-issued" or other Bonds having delivery dates after the date of settlement for purchases made on the Date of Deposit. A consequence of this treatment is that in the computation of Estimated Current Return for the first year, such monies are excluded from Net Annual Interest Income and treated as an adjustment to the Public Offering Price. (See "Essential Information" appearing in Part A of this Prospectus, "COMPOSITION OF TRUSTS" and "WHAT IS THE TAX
STATUS OF UNITHOLDERS?")

A comparison of tax-free and equivalent taxable estimated current returns with the returns on various taxable investments is one element to consider in making an investment decision. The Sponsor may from time to time in its advertising and sales materials compare the then current estimated returns on a Trust and returns over specified periods on other similar Nuveen Trusts with returns on taxable investments such as corporate or U.S. Government bonds, bank CD's and money market accounts or money market funds, each of which has investment characteristics that may differ from those of the Trust. U.S. Government bonds, for example, are backed by the full faith and credit of the U.S. Government and bank CD's and money market accounts are insured by an agency of the federal government. Money market accounts and money market funds provide stability of principal, but pay interest at rates that vary with the condition of the short-term debt market. The investment characteristics of the Trusts are described more fully elsewhere in the Prospectus.

HOW WAS THE PRICE OF THE BONDS DETERMINED AT THE DATE OF DEPOSIT?

The prices at which the Bonds deposited in the Trusts would have been offered to the public on the business day prior to the Date of Deposit were determined by the Trustee on the basis of an evaluation of such Bonds prepared by

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Kenny S&P Evaluation Services, a division of J. J. Kenny Co., Inc. ("Kenny S&P"), a firm regularly engaged in the business of evaluating, quoting or appraising comparable bonds. With respect to Bonds in Insured Trusts and insured Bonds in Traditional Trusts, Kenny S&P evaluated the Bonds as so insured. (See "WHY AND HOW ARE THE BONDS INSURED?")

The amount by which the Trustee's determination of the OFFERING PRICES of the Bonds deposited in the Trusts was greater or less than the cost of such Bonds to the Sponsor was PROFIT OR LOSS to the Sponsor exclusive of any underwriting profit. (See Part A of this Prospectus.) The Sponsor also may realize FURTHER PROFIT OR SUSTAIN FURTHER LOSS as a result of fluctuations in the Public Offering Price of the Units. Cash, if any, made available to the Sponsor prior to the settlement date for a purchase of Units, or prior to the acquisition of all Portfolio securities by a Trust, may be available for use in the Sponsor's business, and may be of benefit to the Sponsor.

WHAT IS THE TAX STATUS OF UNITHOLDERS?

At the respective times of issuance of the Bonds, opinions relating to the validity thereof and to the exclusion of interest thereon from Federal gross income were rendered by bond counsel to the respective issuing authorities. In addition, with respect to State Trusts, where applicable, bond counsel to the issuing authorities rendered opinions as to the exemption of interest on such Bonds, when held by residents of the state in which the issuers of such Bonds are located, from state income taxes and certain state or local intangibles and local income taxes. For a discussion of the tax status of State Trusts, see Part A of this Prospectus. Neither the Sponsor nor Chapman and Cutler has made any special review for the Trusts of the proceedings relating to the issuance of the Bonds or of the basis for the opinions rendered in connection therewith. If the interest on a Bond should be determined to be taxable, the Bond would generally have to be sold at a substantial discount. In addition, investors could be required to pay income tax on interest received prior to the date of which interest is determined to be taxable.

Federally tax-exempt income, including income on Units of the Trusts, will be taken into consideration in computing the portion, if any, of social security benefits received that will be included in a taxpayer's gross income subject to the Federal income tax.

Gain realized on the sale or redemption of the Bonds by the Trustee or of a Unit by a Unitholder is includable in gross income for Federal income tax purposes, and may be includable in gross income for state tax purposes. (Such gain does not include any amounts received in respect of tax-exempt accrued interest or accrued original issue discount, if any.) Sections 1288 and 1272 of the Internal Revenue Code of 1986, as amended (the "Code") provide a complex set of rules governing the accrual of original issue discount. These rules provide that original issue discount accrues either on the basis of a constant compound interest rate or ratably over the term of the Bond, depending on the date the Bond was issued. In addition, special rules apply if the purchase price of a Bond exceeds the original issue price plus the amount of original issue discount which would have previously accrued based upon its issue price (its "adjusted issue price") to prior owners. If a Bond is acquired with accrued interest, that portion of the price paid for the accrued interest is added to the tax basis of the Bond. When this accrued interest is received, it is treated as a return of capital and reduces the tax basis of the Bond. If a Bond is purchased for a premium, the amount of the premium is added to the tax basis of the Bond. Bond premium is amortized over the remaining term of the Bond, and the tax basis of the Bond is reduced each tax year by the amount of the premium amortized in that tax year. The application of these rules will also vary depending on the value of the Bond on the date a Unitholder acquires his Units and the price the Unitholder pays for his Units. Unitholders should consult with their tax advisers regarding these rules and their application.

The "Revenue Reconciliation Act of 1993" (the "Tax Act") subjects tax-exempt bonds to the market discount rules of the Code, effective for bonds purchased after April 30, 1993. In general, market discount is the amount (if any) by which the stated redemption price at maturity exceeds an investor's purchase price (except to the extent that such difference, if any, is attributable to original issue discount not yet accrued), subject to a statutory DE MINIMIS rule. Market discount can arise based on the price the Trust pays for the Bonds or the price a Unitholder pays for his or her Units. Under the Tax Act, accretion of market discount is taxable as ordinary income; under prior law, the accretion had been treated as capital gain. Market discount that accretes while the Trust holds a Bond would be recognized as ordinary income by the Unitholders when principal payments are received on the Bond, upon sale or at redemption (including early redemption), or upon the sale or redemption of his or her Units, unless a Unitholder elects to include market discount in taxable income as it accrues. The market discount rules are complex and Unitholders should consult their tax advisors regarding these rules and their application.

In the opinion of Chapman and Cutler, Counsel to the Sponsor, under existing law:

(1) the Trusts are not associations taxable as corporations for Federal income tax purposes, and interest and accrued original issue discount on Bonds which is excludable from gross income under the Code will retain its status when distributed to the Unitholders; however such interest may be taken into account in computing the alternative minimum tax, an additional tax on branches of foreign corporations and the environmental tax (the "Superfund Tax"). See "CERTAIN TAX MATTERS APPLICABLE TO CORPORATE UNITHOLDERS", below;

(2) each Unitholder of a Trust is considered to be the owner of a pro rata portion of such Trust under Subpart E, subchapter J of Chapter 1 of the Code and will have a taxable event when the Trust disposes of a Bond or

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when the Unitholder redeems or sells Units. Unitholders must reduce the tax basis of their Units for their share of accrued interest received by the Trust, if any, on Bonds delivered after the Unitholders pay for their Units to the extent that such interest accrued on such Bonds before the date the Trust acquired ownership of the Bonds (and the amount of this reduction may exceed the amount of accrued interest paid to the seller) during the period from the Unitholders settlement date to the date such Bonds are delivered to the respective Trusts and, consequently, such Unitholders may have an increase in taxable gain or reduction in capital loss upon the disposition of such Units. Gain or loss upon the sale or redemption of Units is measured by comparing the proceeds of such sale or redemption with the adjusted basis of the Units. If the Trustee disposes of Bonds (whether by sale, payment at maturity, redemption or otherwise), gain or loss is recognized to the Unitholder. The amount of any such gain or loss is measured by comparing the Unitholder's pro rata share of the total proceeds from such disposition with the Unitholder's basis for his or her fractional interest in the asset disposed of. In the case of a Unitholder who purchases Units, such basis (before adjustment for earned original issue discount and amortized bond premium, if any) is determined by apportioning the cost of the Units among each of the Trust assets ratably according to value as of the valuation date nearest the date of acquisition of the Units. The tax basis reduction requirements of said Code relating to amortization of bond premium may, under some circumstances, result in the Unitholder realizing a taxable gain when his or her Units are sold or redeemed for an amount less than or equal to their original cost; and

(3) any amounts paid on defaulted Bonds held by the Trustee under policies of insurance issued with respect to such Bonds will be excludable from Federal gross income if, and to the same extent as, such interest would have been so excludable if paid in the normal course by the issuer of the defaulted Bonds provided that, at the time such policies are purchased, the amounts paid for such policies are reasonable, customary and consistent with the reasonable expectation that the issuer of the Bonds, rather than the insurer, will pay debt service on the Bonds. Paragraph (2) of this opinion is accordingly applicable to policy proceeds representing maturing interest.

In the opinion of Carter, Ledyard & Milburn, counsel to the Trustee, and, in the absence of a New York Trust from the Series, special counsel for the Series for New York tax matters, under existing law:

Under the income tax laws of the State and City of New York, each Trust is not an association taxable as a corporation and the income of each Trust will be treated as the income of the Unitholders.

For a summary of each opinion of special counsel to the respective State Trusts for state tax matters, see Part A of this Prospectus.

ALL STATEMENTS IN THE PROSPECTUS CONCERNING EXCLUSION FROM GROSS INCOME FOR FEDERAL, STATE OR OTHER TAX PURPOSES ARE THE OPINION OF COUNSEL AND ARE TO BE SO CONSTRUED.

Counsel for the Sponsor has also advised that under Section 265 of the Code, interest on indebtedness incurred or continued to purchase or carry Units of a Trust is not deductible for Federal income tax purposes. The Internal Revenue Service has taken the position that such indebtedness need not be directly traceable to the purchase or carrying of Units (however, these rules generally do not apply to interest paid on indebtedness incurred to purchase or improve a personal residence). Also, under Section 265 of the Code, certain financial institutions that acquire Units would generally not be able to deduct any of the interest expense attributable to ownership of such Units. On December 7, 1995, the U.S. Treasury Department released proposed legislation that, if enacted, would generally extend the financial institution rules to all corporations, effective for obligations acquired after the date of announcement. Investors with questions regarding this issue should consult with their tax advisers.

In the case of certain of the Bonds in the Trust, the opinions of bond counsel indicate that interest on such Bonds received by a "substantial user" of the facilities being financed with the proceeds of these Bonds, or persons related thereto, for periods while such Bonds are held by such a user or related person, will not be excludable from Federal gross income, although interest on such Bonds received by others would be excludable from Federal gross income. "Substantial user" and "related person" are defined under the Code and U.S. Treasury Regulations. Any person who believes that he or she may be a "substantial user" or a "related person" as so defined should contact his or her tax adviser.

For purposes of computing the alternative minimum tax for individuals and corporations, interest on certain specified tax-exempt private activity bonds is included as a preference item. The Trusts do not include any such bonds.

CERTAIN TAX MATTERS APPLICABLE TO CORPORATE UNITHOLDERS. In the case of certain corporations, the alternative minimum tax and the Superfund Tax depend upon the corporation's alternative minimum taxable income ("AMTI"), which is the corporation's taxable income with certain adjustments. One of the adjustment items used in computing AMTI and the Superfund Tax of a corporation (other than an S corporation, Regulated Investment Company, Real Estate Investment Trust, or REMIC) is an amount equal to 75% of the excess of such corporation's "adjusted current earnings" over an amount equal to its AMTI (before such adjustment item and the alternative tax net operating loss deduction). "Adjusted current earnings" includes all tax-exempt interest, including interest on all

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Bonds in the Trust. Under current Code provisions, the Superfund Tax does not apply to tax years beginning on or after January 1, 1996. However, the Superfund Tax could be extended retroactively. Under the provisions of Section 884 of the Code, a branch profits tax is levied on the "effectively connected earnings and profits" of certain foreign corporations which include tax-exempt interest such as interest on the Bonds in the Trust. Unitholders should consult their tax advisors with respect to the particular tax consequences to them including the corporate alternative minimum tax, the Superfund Tax and the branch profits tax imposed by Section 884 of the Code.

Ownership of the Units may result in collateral federal income tax consequences to certain taxpayers, including, without limitation, corporations subject to either the environmental tax or the branch profits tax, financial institutions, certain insurance companies, certain S corporations, individual recipients of Social Security or Railroad Retirement benefits and taxpayers who may be deemed to have incurred (or continued) indebtedness to purchase or carry tax-exempt obligations. Prospective investors should consult their tax advisers as to the applicability of any such collateral consequences.

EXCEPT AS NOTED ABOVE AND IN PART A OF THIS PROSPECTUS, THE EXEMPTION OF INTEREST ON STATE AND LOCAL OBLIGATIONS FOR FEDERAL INCOME TAX PURPOSES DISCUSSED ABOVE DOES NOT NECESSARILY RESULT IN EXEMPTION UNDER THE INCOME OR OTHER TAX LAWS OF ANY STATE OR CITY. THE LAWS OF THE SEVERAL STATES VARY WITH RESPECT TO THE TAXATION OF SUCH OBLIGATIONS.

WHAT ARE NORMAL TRUST OPERATING EXPENSES?

No annual advisory fee is charged to the Trusts by the Sponsor. The Sponsor does, however, receive a fee as set forth in "Essential Information" in Part A of this Prospectus for regularly evaluating the Bonds and for maintaining surveillance over the portfolio. (See "UNIT VALUE AND EVALUATION.")

The Trustee receives for ordinary recurring services an annual fee for each plan of distribution for each Trust as set forth in "Essential Information" appearing in Part A of this Prospectus. Each annual fee is per $1,000 principal amount of the underlying Bonds in a Trust for that portion of the Trust that represents a particular plan of distribution. The Trustee's fee may be periodically adjusted in response to fluctuations in short-term interest rates (reflecting the cost to the Trustee of advancing funds to a Trust to meet scheduled distributions) and may be further adjusted in accordance with the cumulative percentage increase of the United States Department of Labor's Consumer Price Index entitled "All Services Less Rent of Shelter" since the establishment of the Trusts. The Trustee has the use of funds, if any, being held in the Interest and Principal Accounts of each Trust for future distributions, payment of expenses and redemptions. These Accounts are non-interest bearing to Unitholders. Pursuant to normal banking procedures, the Trustee benefits from the use of funds held therein. Part of the Trustee's compensation for its services to the Trusts is expected to result from such use of these funds.

Premiums for the policies of insurance obtained by the Sponsor or by the Bond issuers with respect to the Bonds in the Insured Trusts and with respect to insured Bonds in Traditional Trusts have been paid in full prior to the deposit of the Bonds in the Trusts, and the value of such insurance has been included in the evaluation of the Bonds in each Trust and accordingly in the Public Offering Price of Units of each Trust. There are no annual continuing premiums for such insurance.

All or a portion of the expenses incurred in establishing the Trusts, including costs of preparing the registration statement, the trust indenture and other closing documents, registering Units with the Securities and Exchange Commission and states, the initial audit of each Trust portfolio, the initial evaluation, legal fees, the initial fees and expenses of the Trustee and any other non-material out-of-pocket expenses, will be paid by the Trusts and amortized over the first five years of such Trusts. The following are additional expenses of the Trusts and, when paid by or are owed to the Trustee, are secured by a lien on the assets of the Trust or Trusts to which such expenses are allocable: (1) the expenses and costs of any action undertaken by the Trustee to protect the Trusts and the rights and interests of the Unitholders; (2) all taxes and other governmental charges upon the Bonds or any part of the Trusts (no such taxes or charges are being levied or made or, to the knowledge of the Sponsor, contemplated); (3) amounts payable to the Trustee as fees for ordinary recurring services and for extraordinary non-recurring services rendered pursuant to the Indenture, all disbursements and expenses including counsel fees (including fees of bond counsel which the Trustee may retain) sustained or incurred by the Trustee in connection therewith; and (4) any losses or liabilities accruing to the Trustee without negligence, bad faith or willful misconduct on its part. The Trustee is empowered to sell Bonds in order to pay these amounts if funds are not otherwise available in the applicable Interest and Principal Accounts.

The Indenture requires each Trust to be audited on an annual basis at the expense of the Trust by independent public accountants selected by the Sponsor. The Trustee shall not be required, however, to cause such an audit to be performed if its cost to a Trust shall exceed $.05 per Unit on an annual basis. Unitholders of a Trust covered by an audit may obtain a copy of the audited financial statements upon request.

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WHEN ARE DISTRIBUTIONS MADE TO UNITHOLDERS?

Interest received by the Trustee on the Bonds in each Trust, including that part of the proceeds of any disposition of Bonds which represents accrued interest and including any insurance proceeds representing interest due on defaulted Bonds, shall be credited to the "Interest Account" of such Trust and all other moneys received by the Trustee shall be credited to the "Principal Account" of such Trust.

The pro rata share of cash in the Principal Account in each Trust will be computed as of each semi-annual Record Date and distributions to the Unitholders as of such Record Date will be made on or shortly after the fifteenth day of the month. Proceeds received from the disposition, including sale, call or maturity, of any of the Bonds and all amounts paid with respect to zero coupon bonds and Stripped Obligations will be held in the Principal Account and either used to pay for Units redeemed or distributed on the Distribution Date following the next semi-annual Record Date. The Trustee is not required to make a distribution from the Principal Account of any Trust unless the amount available for distribution in such account equals at least ten cents per Unit.

The pro rata share of the Interest Account in each Trust will be computed by the Trustee each month as of each Record Date and distributions will be made on or shortly after the fifteenth day of the month to Unitholders of such Trust as of the Record Date who are entitled to distributions at that time under the plan of distribution chosen. Persons who purchase Units between a Record Date and a Distribution Date will receive their first distribution on the Distribution Date following the next Record Date under the applicable plan of distribution.

Purchasers of Units who desire to receive interest distributions on a monthly or quarterly basis may elect to do so at the time of purchase during the initial public offering period. Those indicating no choice will be deemed to have chosen the semi-annual distribution plan. All Unitholders, however, who purchase Units during the initial public offering period and who hold them of record on the first Record Date will receive the first distribution of interest. Thereafter, Record Dates for monthly distributions will be the first day of each month; Record Dates for quarterly distributions will be the first day of February, May, August and November; and Record Dates for semi-annual distributions will be the first day of May and November. See Part A of this Prospectus for details of distributions per Unit of each Trust under the various plans based upon estimated Net Annual Interest Income at the Date of Deposit. The amount of the regular distributions will generally change when Bonds are redeemed, mature or are sold or when fees and expenses increase or decrease. For the purpose of minimizing fluctuations in the distributions from the Interest Account of a Trust, the Trustee is authorized to advance such amounts as may be necessary to provide for interest distributions of approximately equal amounts. The Trustee shall be reimbursed, without interest, for any such advances from funds in the Interest Account of such Trust. The Trustee's fee takes into account the costs attributable to the outlay of capital needed to make such advances.

The plan of distribution selected by a Unitholder will remain in effect until changed. Unitholders purchasing Units in the secondary market will initially receive distributions in accordance with the election of the prior owner. Unitholders desiring to change their plan of distribution may do so by sending a written notice requesting the change, together with any Certificate(s), to the Trustee. The notice and any Certificate(s) must be received by the Trustee not later than the semi-annual Record Date to be effective as of the semi-annual distribution following the subsequent semi-annual Record Date. Unitholders are requested to make any such changes within 45 days prior to the applicable Record Date. Certificates should only be sent by registered or certified mail to minimize the possibility of their being lost or stolen. (See "OWNERSHIP AND TRANSFER OF UNITS.")

As of the first day of each month the Trustee will deduct from the Interest Account of a Trust or, to the extent funds are not sufficient therein, from the Principal Account of a Trust, amounts needed for payment of expenses of such Trust. The Trustee also may withdraw from said accounts such amount, if any, as it deems necessary to establish a reserve for any governmental charges payable out of such Trust. Amounts so withdrawn shall not be considered a part of a Trust's assets until such time as the Trustee shall return all or any part of such amounts to the appropriate account. In addition, the Trustee shall withdraw from the Interest Account and the Principal Account of a Trust such amounts as may be necessary to cover redemptions of Units of such Trust by the Trustee. Funds which are available for future distributions, redemptions and payment of expenses are held in accounts which are non-interest bearing to Unitholders and are available for use by the Trustee pursuant to normal banking procedures.

ACCUMULATION PLAN

The Sponsor is also the principal underwriter of several open-end mutual funds (the "Accumulation Funds") into which Unitholders may choose to reinvest Trust distributions. Unitholders may elect to reinvest principal distributions or interest and principal distributions automatically, without any sales charge. Each Accumulation Fund has investment objectives which differ in certain respects from those of the Trusts and may invest in securities which would not be eligible for deposit in the Trusts. Further information concerning the Accumulation Plan and a list of Accumulation Funds is set forth in the Information Supplement of this Prospectus, which may be obtained by contacting the Trustee at the phone number listed on the back cover of this Prospectus.

Participants may at any time, by so notifying the Trustee in writing, elect to change the Accumulation Fund into which their distributions are being reinvested, to change from principal only reinvestment to reinvestment of both principal and interest or vice versa, or to terminate their participation in the Accumulation Plan altogether and

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receive future distributions on their Units in cash. There will be no charge or other penalty for such change of election or termination. The character of Trust distributions for income tax purposes will remain unchanged even if they are reinvested in an Accumulation Fund.

HOW DETAILED ARE REPORTS TO UNITHOLDERS?

The Trustee shall furnish Unitholders of a Trust in connection with each distribution, a statement of the amount of interest, if any, and the amount of other receipts (received since the preceding distribution) being distributed, expressed in each case as a dollar amount representing the pro rata share of each Unit of a Trust outstanding and a year to date summary of all distributions paid on said Units. Within a reasonable period of time after the end of each calendar year, the Trustee shall furnish to each person, who at any time during the calendar year was a registered Unitholder of a Trust, a statement with respect to such Trust (i) as to the Interest Account: interest received (including amounts representing interest received upon any disposition of Bonds), and, except for any State Trust, the percentage of such interest by states in which the issuers of the Bonds are located, deductions for fees and expenses of such Trust, redemption of Units and the balance remaining after such distributions and deductions, expressed in each case both as a total dollar amount and as a dollar amount representing the pro rata share of each Unit outstanding on the last business day of such calendar year; (ii) as to the Principal Account: the dates of disposition of any Bonds and the net proceeds received therefrom (excluding any portion representing accrued interest), the amount paid for purchase of Replacement Bonds, the amount paid upon redemption of Units, deductions for payment of applicable taxes and fees and expenses of the Trustee, and the balance remaining after such distributions and deductions expressed both as a total dollar amount and as a dollar amount representing the pro rata share of each Unit outstanding on the last business day of such calendar year; (iii) a list of the Bonds held and the number of Units outstanding on the last business day of such calendar year; (iv) the Unit Value based upon the last computation thereof made during such calendar year; and (v) amounts actually distributed during such calendar year from the Interest Account and from the Principal Account, separately stated, expressed both as total dollar amounts and as dollar amounts representing the pro rata share of each Unit outstanding. Each annual statement will reflect pertinent information in respect of all plans of distribution so that Unitholders may be informed regarding the results of other plans of distribution.

UNIT VALUE AND EVALUATION

The value of each Trust is determined by the Sponsor on the basis of (1) the cash on hand in the Trust or moneys in the process of being collected, (2) the value of the Bonds in the Trust based on the BID prices of the Bonds and (3) interest accrued thereon not subject to collection, LESS (1) amounts representing taxes or governmental charges payable out of the Trust and (2) the accrued expenses of the Trust. The result of such computation is divided by the number of Units of such Trust outstanding as of the date thereof to determine the per Unit value ("Unit Value") of such Trust. The Sponsor may determine the value of the Bonds in each Trust (1) on the basis of current BID prices of the Bonds obtained from dealers or brokers who customarily deal in bonds comparable to those held by a Trust, (2) if bid prices are not available for any of the Bonds, on the basis of bid prices for comparable bonds, (3) by causing the value of the Bonds to be determined by others engaged in the practice of evaluating, quoting or appraising comparable bonds or (4) by any combination of the above. Although the Unit Value of each Trust is based on the BID prices of the Bonds, the Units are sold initially to the public at the Public Offering Price based on the OFFERING prices of the Bonds.

Because the insurance obtained by the Sponsor or by the issuers of Bonds with respect to the Bonds in the Insured Trusts and with respect to insured Bonds in Traditional Trusts is effective so long as such Bonds are outstanding, such insurance will be taken into account in determining the bid and offering prices of such Bonds and therefore some value attributable to such insurance will be included in the value of Units of Trusts that include such Bonds.

HOW UNITS OF THE TRUSTS ARE DISTRIBUTED TO THE PUBLIC

Nuveen, in addition to being the Sponsor, is the sole Underwriter of the Units. It is the intention of the Sponsor to qualify Units of National, Long Intermediate, Intermediate, Short Intermediate and Short Term Trusts for sale under the laws of substantially all of the states of the United States of America, and Units of State Trusts only in the state for which the Trust is named and selected other states.

Promptly following the deposit of Bonds in exchange for Units of the Trusts, it is the practice of the Sponsor to place all of the Units as collateral for a letter or letters of credit from one or more commercial banks under an agreement to release such Units from time to time as needed for distribution. Under such an arrangement the Sponsor pays such banks compensation based on the then current interest rate. This is a normal warehousing arrangement during the period of distribution of the Units to public investors. To facilitate the handling of transactions, sales of Units shall be limited to transactions involving a minimum of either $5,000 or 50 Units, whichever is less. The Sponsor reserves the right to reject, in whole or in part, any order for the purchase of Units.

The Sponsor plans to allow a discount to brokers and dealers in connection with the primary distribution of Units and also in secondary market transactions. The primary market discounts are as follows:

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                                                         DISCOUNT PER UNIT
                                --------------------------------------------------------------------
                                 NATIONAL    LONG INTER-                  SHORT INTER-
                                AND STATE      MEDIATE     INTERMEDIATE      MEDIATE     SHORT TERM
NUMBER OF UNITS*                  TRUSTS       TRUSTS         TRUSTS         TRUSTS        TRUSTS
- ------------------------------  ----------  -------------  -------------  -------------  -----------
Less than 500.................    $3.20         $2.90          $2.70          $2.00         $1.50
500 but less than 1,000.......     3.20         2.90           2.70           2.00          1.50
1,000 but less than 2,500.....     3.20         2.70           2.50           1.80          1.30
2,500 but less than 5,000.....     3.20         2.45           2.25           1.55          1.05
5,000 but less than 10,000....     2.50         2.45           2.25           1.55          1.05
10,000 but less than 25,000...     2.00         2.00           2.00           1.30           .80
25,000 but less than 50,000...     1.75         1.75           1.75           1.30           .60
50,000 or more................     1.75         1.50           1.50           1.00           .60

*Breakpoint sales charges and related dealer concessions are computed both on a dollar basis and on the basis of the number of Units purchased, using the equivalent of 500 Units to $50,000, 2,500 Units to $250,000 etc. and will be applied on that basis which is more favorable to the purchaser.

The Sponsor currently intends to maintain a secondary market for Units of each Trust. See "MARKET FOR UNITS." The amount of the dealer concession on secondary market purchases of Trust Units through the Sponsor will be computed based upon the value of the Bonds in the Trust portfolio, including the sales charge computed as described in "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?", and adjusted to reflect the cash position of the Trust principal account, and will vary with the size of the purchase as shown in the following table:

                                                               AMOUNT OF PURCHASE*
                            -----------------------------------------------------------------------------------------
                                        $50,000   $100,000   $250,000   $500,000   $1,000,000  $2,500,000
                              UNDER       TO         TO         TO         TO          TO          TO      $5,000,000
YEARS TO MATURITY            $50,000    $99,999   $249,999   $499,999   $999,999   $2,499,999  $4,999,999   OR MORE
- --------------------------  ---------  ---------  ---------  ---------  ---------  ----------  ----------  ----------
Less than 1...............      0          0          0          0          0          0           0           0
1 but less than 2.........    1.00%      .90%       .85%       .80%       .70%        .55%       .467%       .389%
2 but less than 3.........    1.30%      1.20%      1.10%      1.00%      .90%        .73%       .634%       .538%
3 but less than 4.........    1.60%      1.45%      1.35%      1.25%      1.10%       .90%       .781%       .662%
4 but less than 5.........    2.00%      1.85%      1.75%      1.55%      1.40%      1.25%       1.082%      .914%
5 but less than 7.........    2.30%      2.15%      1.95%      1.80%      1.65%      1.50%       1.320%      1.140%
7 but less than 10........    2.60%      2.45%      2.25%      2.10%      1.95%      1.70%       1.496%      1.292%
10 but less than 13.......    3.00%      2.80%      2.60%      2.45%      2.30%      2.00%       1.747%      1.494%
13 but less than 16.......    3.25%      3.15%      3.00%      2.75%      2.50%      2.15%       1.878%      1.606%
16 or more................    3.50%      3.50%      3.40%      3.35%      3.00%      2.50%       2.185%      1.873%

*Breakpoint sales charges and related dealer concessions are computed both on a dollar basis and on the basis of the number of Units purchased, using the equivalent of 500 Units to $50,000, 2,500 Units to $250,000, etc., and will be applied on that basis which is more favorable to the purchaser.

The Sponsor reserves the right to change the foregoing dealer concessions from time to time.

Registered investment advisers, certified financial planners and registered broker-dealers who in each case either charge periodic fees for financial planning, investment advisory or asset management services, or provide such services in connection with the establishment of an investment account for which a comprehensive "wrap fee" charge is imposed, and bank trust departments investing funds over which they exercise exclusive discretionary investment authority and that are held in a fiduciary, agency, custodial or similar capacity, are not entitled to receive any dealer concession for any sales made to investors which qualified as "Discounted Purchases" during the primary or secondary market. (See "HOW IS THE PUBLIC OFFERING PRICE DETERMINED?")

Certain commercial banks are making Units of the Trusts available to their customers on an agency basis. A portion of the sales charge paid by these customers is retained by or remitted to the banks in the amounts shown in the above table. The Glass-Steagall Act prohibits banks from underwriting Trust Units; the Act does, however, permit certain agency transactions and banking regulators have not indicated that these particular agency transactions are not permitted under the Act. In Texas and in certain other states, any bank making Units available must be registered as a broker-dealer under state law.

OWNERSHIP AND TRANSFER OF UNITS

The ownership of Units is evidenced by book entry positions recorded on the books and records of the Trustee unless the Unitholder expressly requests that the purchased Units be evidenced in Certificate form. The Trustee is authorized to treat as the owner of Units that person who at the time is registered as such on the books of the Trustee. Any Unitholder who holds a Certificate may change to book entry ownership by submitting to the Trustee the Certificate along with a written request that the Units represented by such Certificate be held in book entry form. Likewise, a Unitholder who holds Units in book entry form may obtain a Certificate for such Units by written request to the Trustee. Units may be held in denominations of one Unit or any multiple or fraction thereof. Fractions of Units are computed to three decimal places. Any Certificates issued will be numbered serially for identification, and are issued in fully registered form, transferable only on the books of the Trustee. Book entry Unitholders will receive a Book Entry Position Confirmation reflecting their ownership.

For Trusts allowing optional plans of distribution, Certificates for Units will bear an appropriate notation on their face indicating which plan of distribution has been selected. When a change is made, the existing Certificates

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must be surrendered to the Trustee and new Certificates issued to reflect the currently effective plan of distribution. There will be no charge for this service. Holders of book entry Units can change their plan of distribution by making a written request to the Trustee, which will issue a new Book Entry Position Confirmation to reflect such change.

Units are transferable by making a written request to the Trustee and, in the case of Units evidenced by Certificate(s), by presenting and surrendering such Certificate(s) to the Trustee, at its address listed on the back cover of this Part B of the Prospectus, properly endorsed or accompanied by a written instrument or instruments of transfer. The Certificate(s) should be sent registered or certified mail for the protection of the Unitholder. Each Unitholder must sign such written request, and such Certificate(s) or transfer instrument, exactly as his name appears on (a) the face of the Certificate(s) representing the Units to be transferred, or (b) the Book Entry Position Confirmation(s) relating to the Units to be transferred. Such signature(s) must be guaranteed by a guarantor acceptable to the Trustee. In certain instances the Trustee may require additional documents such as, but not limited to, trust instruments, certificates of death, appointments as executor or administrator or certificates of corporate authority. Mutilated Certificates must be surrendered to the Trustee in order for a replacement Certificate to be issued. Although at the date hereof no charge is made and none is contemplated, a Unitholder may be required to pay $2.00 to the Trustee for each Certificate reissued or transfer of Units requested and to pay any governmental charge which may be imposed in connection therewith.

REPLACEMENT OF LOST, STOLEN OR DESTROYED CERTIFICATES.

To obtain a new Certificate replacing one that has been lost, stolen, or destroyed, the Unitholder must furnish the Trustee with sufficient indemnification and pay such expenses as the Trustee may incur. This indemnification must be in the form of an Open Penalty Bond of Indemnification. The premium for such an indemnity bond may vary, but currently amounts to 1% of the market value of the Units represented by the Certificate. In the case however, of a Trust as to which notice of termination has been given, the premium currently amounts to 0.5% of the market value of the Units represented by such Certificate.

HOW UNITS MAY BE REDEEMED WITHOUT CHARGE

Unitholders may redeem all or a portion of their Units by (1) making a written request for such redemption (book entry Unitholders may use the redemption form on the reverse side of their Book Entry Position Confirmation) to the Trustee at its address listed on the back cover of this Part B of the Prospectus (redemptions of 1,000 Units or more will require a signature guarantee), (2) in the case of Units evidenced by a Certificate, by also tendering such Certificate to the Trustee, duly endorsed or accompanied by proper instruments of transfer with signatures guaranteed as explained above, or provide satisfactory indemnity required in connection with lost, stolen or destroyed Certificates and (3) payment of applicable governmental charges, if any. Certificates should be sent only by registered or certified mail to minimize the possibility of their being lost or stolen. (See "OWNERSHIP AND TRANSFER OF UNITS.") No redemption fee will be charged. A Unitholder may authorize the Trustee to honor telephone instructions for the redemption of Units held in book entry form. Units represented by Certificates may not be redeemed by telephone. The proceeds of Units redeemed by telephone will be sent by check either to the Unitholder at the address specified on his account or to a financial institution specified by the Unitholder for credit to the account of the Unitholder. A Unitholder wishing to use this method of redemption must complete a Telephone Redemption Authorization Form and furnish the Form to the Trustee. Telephone Redemption Authorization Forms can be obtained from a Unitholder's registered representative or by calling the Trustee. Once the completed Form is on file, the Trustee will honor telephone redemption requests by any authorized person. The time a telephone redemption request is received determines the "date of tender" as discussed below. The redemption proceeds will be mailed within three business days following the telephone redemption request. Only Units held in the name of individuals may be redeemed by telephone; accounts registered in broker name, or accounts of corporations or fiduciaries (including among others, trustees, guardians, executors and administrators) may not use the telephone redemption privilege.

On the third business day following the date of tender, the Unitholder will be entitled to receive in cash for each Unit tendered an amount equal to the Unit Value of such Trust determined by the Trustee, as of 4:00 p.m. eastern time, or as of any earlier closing time on a day on which the Exchange is scheduled in advance to close at such earlier time, on the date of tender as defined hereafter, plus accrued interest to, but not including, the third business day after the date of tender ("Redemption Price"). The price received upon redemption may be more or less than the amount paid by the Unitholder depending on the value of the Bonds on the date of tender. Unitholders should check with the Trustee or their broker to determine the Redemption Price before tendering Units.

The "date of tender" is deemed to be the date on which the request for redemption of Units is received in proper form by the Trustee, except that as regards a redemption request received after 4:00 p.m. eastern time, or as of any earlier closing time on a day on which the Exchange is scheduled in advance to close at such earlier time, or on any day on which the Exchange is normally closed, the date of tender is the next day on which such Exchange is normally open for trading and such request will be deemed to have been made on such day and the redemption will be effected at the Redemption Price computed on that day.

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Accrued interest paid on redemption shall be withdrawn from the Interest Account of the appropriate Trust or, if the balance therein is insufficient, from the Principal Account of such Trust. All other amounts paid on redemption shall be withdrawn from the Principal Account. The Trustee is empowered to sell underlying Bonds of a Trust in order to make funds available for redemption. (See "HOW BONDS MAY BE REMOVED FROM THE TRUSTS.") Units so redeemed shall be cancelled. To the extent that Bonds are sold from a Trust, the size and diversity of such Trust will be reduced. Such sales may be required at a time when Bonds would not otherwise be sold and might result in lower prices than might otherwise be realized.

The Redemption Price is determined on the basis of the BID prices of the Bonds in each Trust, while the initial Public Offering Price of Units will be determined on the basis of the OFFERING prices of the Bonds as of 4:00 p.m. eastern time on any day on which the Exchange is normally open for trading, or as of any earlier closing time on a day on which the Exchange is scheduled in advance to close at such earlier time, and such determination is made. As of any given time, the difference between the bid and offering prices of such Bonds may be expected to average 1/2% to 2% of principal amount. In the case of actively traded Bonds, the difference may be as little as 1/4 to 1/2 of 1%, and in the case of inactively traded Bonds such difference usually will not exceed 3%.

The right of redemption may be suspended and payment postponed for any period during which the Securities and Exchange Commission determines that trading in the municipal bond market is restricted or an emergency exists, as a result of which disposal or evaluation of the Bonds is not reasonably practicable, or for such other periods as the Securities and Exchange Commission may by order permit.

Under regulations issued by the Internal Revenue Service, the Trustee will be required to withhold a specified percentage of the principal amount of a Unit redemption if the Trustee has not been furnished the redeeming Unitholder's tax identification number in the manner required by such regulations. Any amount so withheld is transmitted to the Internal Revenue Service and may be recovered by the Unitholder only when filing his or her tax return. Under normal circumstances the Trustee obtains the Unitholder's tax identification number from the selling broker at the time the Certificate or Book Entry Return Confirmation is issued, and this number is printed on the Certificate or Book Entry Return Confirmation and on distribution statements. If a Unitholder's tax identification number does not appear as described above, or if it is incorrect, the Unitholder should contact the Trustee before redeeming Units to determine what action, if any, is required to avoid this "back-up withholding."

HOW UNITS MAY BE PURCHASED BY THE SPONSOR

The Trustee will notify the Sponsor of any tender of Units for redemption. If the Sponsor's bid in the secondary market at that time equals or exceeds the Redemption Price it may purchase such Units by notifying the Trustee before the close of business on the second succeeding business day and by making payment therefor to the Unitholder not later than the day on which payment would otherwise have been made by the Trustee. (See "HOW UNITS MAY BE REDEEMED WITHOUT CHARGE.") The Sponsor's current practice is to bid at the Redemption Price in the secondary market. Units held by the Sponsor may be tendered to the Trustee for redemption as any other Units.

HOW BONDS MAY BE REMOVED FROM THE TRUSTS

Bonds will be removed from a Trust as they mature or are redeemed by the issuers thereof. See Part A of this Prospectus and "RISK FACTORS" for a discussion of call provisions of portfolio Bonds.

The Indenture also empowers the Trustee to sell Bonds for the purpose of redeeming Units tendered by any Unitholder, and for the payment of expenses for which income may not be available. Under the Indenture, the Sponsor is obligated to provide the Trustee with a current list of Bonds in each Trust to be sold in such circumstances. In deciding which Bonds should be sold the Sponsor intends to consider, among other things, such factors as: (1) market conditions; (2) market prices of the Bonds; (3) the effect on income distributions to Unitholders of the sale of various Bonds; (4) the effect on principal amount of underlying Bonds per Unit of the sale of various Bonds; (5) the financial condition of the issuers; and (6) the effect of the sale of various Bonds on the investment character of the Trust. Such sales, if required, could result in the sale of Bonds by the Trustee at prices less than original cost to the Trust. To the extent Bonds are sold, the size and diversity of such Trust will be reduced.

In addition, the Sponsor is empowered to direct the Trustee to liquidate Bonds upon the happening of certain other events, such as default in the payment of principal and/or interest, an action of the issuer that will adversely affect its ability to continue payment of the principal of and interest on its Bonds, or an adverse change in market, revenue or credit factors affecting the investment character of the Bonds. If a default in the payment of the principal of and/or interest on any of the Bonds occurs, and if the Sponsor fails to instruct the Trustee whether to sell or continue to hold such Bonds within 30 days after notification by the Trustee to the Sponsor of such default, the Indenture provides that the Trustee shall liquidate said Bonds forthwith and shall not be liable for any loss so incurred. The Sponsor may also direct the Trustee to liquidate Bonds in a Trust if the Bonds in the Trust are the subject of an advanced refunding, generally considered to be when refunding bonds are issued and the proceeds thereof are deposited in irrevocable trust to retire the refunded Bonds on their redemption date.

21

Except as stated in "COMPOSITION OF TRUSTS" regarding the limited right of substitution of Replacement Bonds for Failed Bonds, and except for refunding securities that may be exchanged for Bonds under certain conditions specified in the Indenture, the Indenture does not permit either the Sponsor or the Trustee to acquire or deposit bonds either in addition to, or in substitution for, any of the Bonds initially deposited in a Trust.

INFORMATION ABOUT THE TRUSTEE

The Trustee and its address are stated on the back cover of this Part B of the Prospectus. The Trustee is subject to supervision and examination by the Federal Deposit Insurance Corporation, the Board of Governors of the Federal Reserve System and either the Comptroller of the Currency or state banking authorities.

LIMITATIONS ON LIABILITIES OF SPONSOR AND TRUSTEE

The Sponsor and the Trustee shall be under no liability to Unitholders for taking any action or for refraining from any action in good faith pursuant to the Indenture, or for errors in judgment, but shall be liable only for their own negligence, lack of good faith or willful misconduct. The Trustee shall not be liable for depreciation or loss incurred by reason of the sale by the Trustee of any of the Bonds. In the event of the failure of the Sponsor to act under the Indenture, the Trustee may act thereunder and shall not be liable for any action taken by it in good faith under the Indenture.

The Trustee shall not be liable for any taxes or other governmental charges imposed upon or in respect of the Bonds or upon the interest thereon or upon it as Trustee under the Indenture or upon or in respect of any Trust which the Trustee may be required to pay under any present or future law of the United States of America or of any other taxing authority having jurisdiction. In addition, the Indenture contains other customary provisions limiting the liability of the Trustee.

SUCCESSOR TRUSTEES AND SPONSORS

The Trustee or any successor trustee may resign by executing an instrument of resignation in writing and filing same with the Sponsor and mailing a copy of a notice of resignation to all Unitholders then of record. Upon receiving such notice, the Sponsor is required to promptly appoint a successor trustee. If the Trustee becomes incapable of acting or is adjudged a bankrupt or insolvent, or a receiver or other public officer shall take charge of its property or affairs, the Sponsor may remove the Trustee and appoint a successor by written instrument. The resignation or removal of a trustee and the appointment of a successor trustee shall become effective only when the successor trustee accepts its appointment as such. Any successor trustee shall be a corporation authorized to exercise corporate trust powers, having capital, surplus and undivided profits of not less than $5,000,000. Any corporation into which a trustee may be merged or with which it may be consolidated, or any corporation resulting from any merger or consolidation to which a trustee shall be a party, shall be the successor trustee.

If upon resignation of a trustee no successor has been appointed and has accepted the appointment within 30 days after notification, the retiring trustee may apply to a court of competent jurisdiction for the appointment of a successor.

If the Sponsor fails to undertake any of its duties under the Indenture, and no express provision is made for action by the Trustee in such event, the Trustee may, in addition to its other powers under the Indenture (1) appoint a successor sponsor or (2) terminate the Indenture and liquidate the Trusts.

INFORMATION ABOUT THE SPONSOR

Founded in 1898, Nuveen is the oldest and largest investment banking firm specializing in the underwriting and distribution of tax-exempt securities and maintains the largest research department in the investment banking community devoted exclusively to the analysis of municipal securities. In 1961, Nuveen began sponsoring the Nuveen Tax-Free Unit Trust and since that time has issued more than $36 billion in tax-exempt unit trusts, including over $12 billion in tax-exempt insured unit trusts. In addition, Nuveen open-end and closed-end funds held approximately $35 billion in securities under management as of the date of this Statement. Over 1,000,000 individuals have invested to date in Nuveen's tax-exempt funds and trusts. Nuveen is a subsidiary of The John Nuveen Company which, in turn, is approximately 78% owned by the St. Paul Companies, Inc. ("St. Paul"). St. Paul is located in St. Paul, Minnesota and is principally engaged in providing property-liability insurance through subsidiaries. Nuveen is a member of the National Association of Securities Dealers, Inc. and the Securities Industry Association and has its principal offices located in Chicago (333 W. Wacker Drive) and New York (Swiss Bank Tower, 10 East 50th Street). Nuveen maintains 11 regional offices.

To help advisers and investors better understand and more efficiently use an investment in the Trusts to reach their investment goals, the Sponsor may advertise and create specific investment programs and systems. For example, such activities may include presenting information on how to use an investment in the Trust, alone or in combination with an investment in other mutual funds or unit investment trusts sponsored by Nuveen, to accumulate assets for future education needs or periodic payments such as insurance premiums. The Trusts' sponsor may produce software or additional sales literature to promote the advantages of using the Trusts to meet these and other specific investor needs.

22

OTHER INFORMATION
AMENDMENT OF INDENTURE

The Indenture may be amended by the Trustee and the Sponsor without the consent of any of the Unitholders (1) to cure any ambiguity or to correct or supplement any provision thereof which may be defective or inconsistent, or (2) to make such other provisions as shall not adversely affect the Unitholders, provided, however, that the Indenture may not be amended to increase the number of Units in any Trust or to permit the deposit or acquisition of bonds either in addition to, or in substitution for any of the Bonds initially deposited in any Trust except as stated in "COMPOSITION OF TRUSTS" regarding the limited right of substitution of Replacement Bonds and except for the substitution of refunding bonds under certain circumstances. The Trustee shall advise the Unitholders of any amendment promptly after execution thereof.

TERMINATION OF INDENTURE

Each Trust may be liquidated at any time by written consent of 100% of the Unitholders or by the Trustee when the value of such Trust, as shown by any evaluation, is less than 20% of the original principal amount of such Trust and will be liquidated by the Trustee in the event that Units not yet sold aggregating more than 60% of the Units originally created are tendered for redemption by the Sponsor thereby reducing the net worth of such Trust to less than 40% of the principal amount of the Bonds originally deposited in the portfolio. (See "Essential Information" appearing in Part A of this Prospectus.) The sale of Bonds from the Trusts upon termination may result in realization of a lesser amount than might otherwise be realized if such sale were not required at such time. For this reason, among others, the amount realized by a Unitholder upon termination may be less than the principal amount of Bonds originally represented by the Units held by such Unitholder. The Indenture will terminate upon the redemption, sale or other disposition of the last Bond held thereunder, but in no event shall it continue beyond the end of the calendar year preceding the fiftieth anniversary of its execution for National and State Trusts, beyond the end of the calendar year preceding the twentieth anniversary of its execution for Long Intermediate, and Intermediate Trusts or beyond the end of the calendar year preceding the tenth anniversary of its execution for Short Intermediate and Short Term Trusts.

Written notice of any termination specifying the time or times at which Unitholders may surrender their Certificates, if any, for cancellation shall be given by the Trustee to each Unitholder at the address appearing on the registration books of a Trust maintained by the Trustee. Within a reasonable time thereafter, the Trustee shall liquidate any Bonds in the Trust then held and shall deduct from the assets of the Trust any accrued costs, expenses or indemnities provided by the Indenture which are allocable to such Trust, including estimated compensation of the Trustee and costs of liquidation and any amounts required as a reserve to provide for payment of any applicable taxes or other governmental charges. The Trustee shall then distribute to Unitholders of such Trust their pro rata share of the balance of the Interest and Principal Accounts. With such distribution, the Unitholders shall be furnished a final distribution statement, in substantially the same form as the annual distribution statement, of the amount distributable. At such time as the Trustee in its sole discretion shall determine that any amounts held in reserve are no longer necessary, it shall make distribution thereof to Unitholders in the same manner.

LEGAL OPINION

The legality of the Units offered hereby has been passed upon by Chapman and Cutler, 111 West Monroe Street, Chicago, Illinois 60603. Special counsel for the Trusts for respective state tax matters are named in "Tax Status" for each Trust appearing in Part A of this Prospectus. Carter, Ledyard & Milburn, 2 Wall Street, New York, New York 10005, has acted as counsel for the Trustee with respect to the Series, and, in the absence of a New York Trust from the Series, as special New York tax counsel for the Series.

AUDITORS

The "Statement of Condition" and "Schedule of Investments" at Date of Deposit included in Part A of this Prospectus have been audited by Arthur Andersen LLP, independent public accountants, as indicated in their report in Part A of this Prospectus, and are included herein in reliance upon the authority of said firm as experts in giving said report.

SUPPLEMENTAL INFORMATION

Upon written or telephonic request to the Trustee, investors will receive at no cost to the investor supplemental information about this Trust, which has been filed with the Securities and Exchange Commission and is intended to supplement information contained in Part A and Part B of this Prospectus. The supplemental information includes more detailed information concerning certain of the Bonds included in the Trusts contained in the applicable Series and more specific risk information concerning the individual state Trusts. This supplement also includes additional general information about the Sponsor and the Trusts.

23

NUVEEN Tax-Free Unit Trusts

PROSPECTUS -- PART B
FEBRUARY 1, 1997

       SPONSOR             John Nuveen & Co. Incorporated
                           333 West Wacker Drive
                           Chicago, IL 60606-1286
                           Telephone: 312.917.7700

                           Swiss Bank Tower
                           10 East 50th Street
                           New York, NY 10022
                           212.207.2000

       TRUSTEE             The Chase Manhattan Bank
                           4 New York Plaza
                           New York, NY 10004-2413
                           800.257.8787

 LEGAL COUNSEL             Chapman and Cutler
    TO SPONSOR             111 West Monroe Street
                           Chicago, IL 60603

   INDEPENDENT             Arthur Andersen LLP
        PUBLIC             33 West Monroe Street
   ACCOUNTANTS             Chicago, IL 60603
FOR THE TRUSTS


Except as to statements made herein furnished by the Trustee, the Trustee has assumed no responsibility for the accuracy, adequacy and completeness of the information contained in this Prospectus.

This Prospectus does not contain all of the information set forth in the registration statement and exhibits relating thereto, filed with the Securities and Exchange Commission, Washington, D.C., under the Securities Act of 1933, and to which reference is made.

No person is authorized to give any information or to make representations not contained in this Prospectus or in supplemental information or sales literature prepared by the Sponsor, and any information or representation not contained therein must not be relied upon as having been authorized by either the Trusts, the Trustee or the Sponsor. This Prospectus does not constitute an offer to sell, or a solicitation of an offer to buy, securities in any State to any person to whom it is not lawful to make such offer in such state. The Trusts are registered as Unit Investment Trusts under the Investment Company Act of 1940, as amended. Such registration does not imply that the Trusts or any of their Units have been guaranteed, sponsored, recommended or approved by the United States or any State or agency or officer thereof.


NUVEEN TAX-FREE UNIT TRUSTS


INFORMATION SUPPLEMENT

NUVEEN SERIES 943

This Information Supplement provides additional information concerning the structure, operations and risks of a Nuveen Tax-Free Unit Trust not found in the prospectuses for the Trusts. This Information Supplement is not a prospectus and does not include all of the information that a prospective investor should consider before investing in a Trust. This Information Supplement should be read in conjunction with the prospectus for the Trust in which an investor is considering investing ("Prospectus"). Copies of the Prospectus can be obtained by calling or writing the Trustee at the telephone number and address indicated in Part B of the Prospectus. This Information Supplement has been created to supplement information contained in the Prospectus.

This Information Supplement is dated May 30, 1997. Capitalized terms have been defined in the Prospectus.

TABLE OF CONTENTS


GENERAL RISK DISCLOSURE.....................................................           2
  Health Care Facility Obligations..........................................           2
  Housing Obligations.......................................................           2
  Single Family Mortgage Revenue Bonds......................................           2
  Federally Enhanced Obligations............................................           3
  Industrial Revenue Obligations............................................           3
  Electric Utility Obligations..............................................           3
  Transportation Facility Revenue Bonds.....................................           4
  Water and/or Sewerage Obligations.........................................           4
  University and College Revenue Obligations................................           4
  Bridge Authority and Tollroad Obligations.................................           4
  Dedicated-Tax Supported Bonds.............................................           4
  Municipal Lease Bonds.....................................................           5
  Original Issue Discount Bonds and Stripped Obligations....................           5
WHY AND HOW ARE THE BONDS INSURED?..........................................           6
ACCUMULATION PLAN...........................................................           7
INFORMATION ABOUT THE SPONSOR...............................................           9
DESCRIPTION OF RATINGS......................................................          10
HOW THE TRUST COMPARES PERFORMANCE..........................................          12
HOW TO CALCULATE YOUR ESTIMATED INCOME......................................          13
Appendix A -- Colorado Disclosure...........................................         A-1
Appendix B -- New York Disclosure...........................................         B-1


GENERAL RISK DISCLOSURE

An investment in Units of any Trust should be made with an understanding of the risks that such an investment may entail. These include the ability of the issuer, or, if applicable, an insurer, to make payments of interest and principal when due, the effects of changes in interest rates generally, early call provisions and the potential for changes in the tax status of the Bonds. As set forth in the portfolio summaries in Part A of this Prospectus, the Trusts may contain or be concentrated in one or more of the types of bonds discussed below. The following paragraphs discuss certain circumstances which may adversely affect the ability of issuers of Bonds held in the portfolio of a Trust to make payment of principal and interest thereon or which may adversely affect the ratings of such Bonds; with respect to Insured Trusts, however, because of the insurance obtained by the Sponsor or by the issuers of the Bonds, such changes should not adversely affect an Insured Trust's receipt of principal and interest, the Standard & Poor's AAA or Moody's Aaa ratings of the Bonds in the Insured Trust portfolio, or the Standard & Poor's AAA rating of the Units of each such Insured Trust. For economic risks specific to the individual Trusts, see "Risk Factors" for each Trust.

HEALTH CARE FACILITY OBLIGATIONS. Some of the Bonds in a Trust may be obligations of issuers whose revenues are derived from services provided by hospitals or other health care facilities, including nursing homes. Ratings of bonds issued for health care facilities are sometimes based on feasibility studies that contain projections of occupancy levels, revenues and expenses. A facility's gross receipts and net income available for debt service may be affected by future events and conditions including, among other things, demand for services, the ability of the facility to provide the services required, an increasing shortage of qualified nurses or a dramatic rise in nursing salaries, physicians' confidence in the facility, management capabilities, economic developments in the service area, competition from other similar providers, efforts by insurers and governmental agencies to limit rates, legislation establishing state rate-setting agencies, expenses, government regulation, the cost and possible unavailability of malpractice insurance, and the termination or restriction of governmental financial assistance, including that associated with Medicare, Medicaid and other similar third party payor programs. Medicare reimbursements are currently calculated on a prospective basis and are not based on a provider's actual costs. Such method of reimbursement may adversely affect reimbursements to hospitals and other facilities for services provided under the Medicare program and thereby may have an adverse effect on the ability of such institutions to satisfy debt service requirements. In the event of a default upon a bond secured by hospital facilities, the limited alternative uses for such facilities may result in the recovery upon such collateral not providing sufficient funds to fully repay the bonds.

Certain hospital bonds provide for redemption at par upon the damage, destruction or condemnation of the hospital facilities or in other special circumstances.

HOUSING OBLIGATIONS. Some of the Bonds in a Trust may be obligations of issuers whose revenues are primarily derived from mortgage loans to housing projects for low to moderate income families. Such issues are generally characterized by mandatory redemption at par or, in the case of original issue discount bonds, accreted value in the event of economic defaults and in the event of a failure of the operator of a project to comply with certain covenants as to the operation of the project. The failure of such operator to comply with certain covenants related to the tax-exempt status of interest on the Bonds, such as provisions requiring that a specified percentage of units be rented or available for rental to low or moderate income families, potentially could cause interest on such Bonds to be subject to Federal income taxation from the date of issuance of the Bonds. The ability of such issuers to make debt service payments will be affected by events and conditions affecting financed projects, including, among other things, the achievement and maintenance of sufficient occupancy levels and adequate rental income, employment and income conditions prevailing in local labor markets, increases in taxes, utility costs and other operating expenses, the managerial ability of project managers, changes in laws and governmental regulations, the appropriation of subsidies, and social and economic trends affecting the localities in which the projects are located. Occupancy of such housing projects may be adversely affected by high rent levels and income limitations imposed under Federal and state programs.

SINGLE FAMILY MORTGAGE REVENUE BONDS. Some of the Bonds in a Trust may be single family mortgage revenue bonds, which are issued for the purpose of acquiring from originating financial institutions notes secured by mortgages on residences located within the issuer's boundaries and owned by persons of low or moderate income. Mortgage loans are generally partially or completely prepaid prior to their final maturities as a result of events such as sale of the mortgaged premises, default, condemnation or casualty loss. Because these bonds are subject to extraordinary mandatory redemption in whole or in part from such prepayments of mortgage loans, a substantial portion of such bonds will probably be redeemed prior to their scheduled maturities or even prior to their ordinary call dates. Extraordinary mandatory redemption without premium could also result from the failure of the originating financial institutions to make mortgage loans in sufficient amounts within a specified time period. The redemption price of such issues may be more or less than the offering price of such bonds. Additionally, unusually

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high rates of default on the underlying mortgage loans may reduce revenues available for the payment of principal of or interest on such mortgage revenue bonds. Single family mortgage revenue bonds issued after December 31, 1980 were issued under Section 103A of the Internal Revenue Code of 1954, as amended, or
Section 143 of the Internal Revenue Code of 1986, which Sections contain certain requirements relating to the use of the proceeds of such bonds in order for the interest on such bonds to retain its tax-exempt status. In each case, the issuer of the bonds has covenanted to comply with applicable requirements and bond counsel to such issuer has issued an opinion that the interest on the bonds is exempt from Federal income tax under existing laws and regulations. There can be no assurance that such continuing requirements will be satisfied; the failure to meet such requirements could cause interest on the Bonds to be subject to Federal income taxation, possibly from the date of issuance of the Bonds.

FEDERALLY ENHANCED OBLIGATIONS. Some of the mortgages which secure the various health care or housing projects which underlie the previously discussed Health Facility, Housing, and Single Family Mortgage Revenue Obligations (the "Obligations") in a Trust may be insured by the Federal Housing Administration ("FHA"). Under FHA regulations, the maximum insurable mortgage amount cannot exceed 90% of the FHA's estimated value of the project. The FHA mortgage insurance does not constitute a guarantee of timely payment of the principal of and interest on the Obligations. Payment of mortgage insurance benefits may be
(1) less than the principal amount of Obligations outstanding or (2) delayed if disputes arise as to the amount of the payment or if certain notices are not given to the FHA within the prescribed time periods. In addition, some of the previously discussed Obligations may be secured by mortgage-backed certificates guaranteed by the Government National Mortgage Association ("GNMA"), a wholly owned corporate instrumentality of the United States, and/or the Federal National Mortgage Association ("Fannie Mae") a federally chartered and stockholder-owed corporation. GNMA and Fannie Mae guarantee timely payment of principal and interest on the mortgage-backed certificates, even where the underlying mortgage payments are not made. While such mortgage-backed certificates are often pledged to secure payment of principal and interest on the Obligations, timely payment of interest and principal on the Obligations is not insured or guaranteed by the United States, GNMA, Fannie Mae or any other governmental agency or instrumentality. The GNMA mortgage-backed certificates constitute a general obligation of the United States backed by its full faith and credit. The obligations of Fannie Mae, including its obligations under the Fannie Mae mortgage-backed securities, are obligations solely of Fannie Mae and are not backed by, or entitled to, the full faith and credit of the United States.

INDUSTRIAL REVENUE OBLIGATIONS. Certain of the Bonds in a Trust may be industrial revenue bonds ("IRBs"), including pollution control revenue bonds, which are tax-exempt securities issued by states, municipalities, public authorities or similar entities to finance the cost of acquiring, constructing or improving various industrial projects. These projects are usually operated by corporate entities. Issuers are obligated only to pay amounts due on the IRBs to the extent that funds are available from the unexpended proceeds of the IRBs or receipts or revenues of the issuer under an arrangement between the issuer and the corporate operator of a project. The arrangement may be in the form of a lease, installment sale agreement, conditional sale agreement or loan agreement, but in each case the payments to the issuer are designed to be sufficient to meet the payments of amounts due on the IRBs. Regardless of the structure, payment of IRBs is solely dependent upon the creditworthiness of the corporate operator of the project and, if applicable, corporate guarantor. Corporate operators or guarantors may be affected by many factors which may have an adverse impact on the credit quality of the particular company or industry. These include cyclicality of revenues and earnings, regulatory and environmental restrictions, litigation resulting from accidents or environmentally-caused illnesses, extensive competition and financial deterioration resulting from a corporate restructuring pursuant to a leveraged buy-out, takeover or otherwise. Such a restructuring may result in the operator of a project becoming highly leveraged which may have an impact on such operator's creditworthiness which in turn would have an adverse impact on the rating and/or market value of such Bonds. Further, the possibility of such a restructuring may have an adverse impact on the market for and consequently the value of such Bonds, even though no actual takeover or other action is ever contemplated or effected. The IRBs in a Trust may be subject to special or extraordinary redemption provisions which may provide for redemption at par or, in the case of original issue discount bonds, accreted value. The Sponsor cannot predict the causes or likelihood of the redemption of IRBs in a Trust prior to the stated maturity of such Bonds.

ELECTRIC UTILITY OBLIGATIONS. Some of the Bonds in a Trust may be obligations of issuers whose revenues are primarily derived from the sale of electric energy. The problems faced by such issuers include the difficulty in obtaining approval for timely and adequate rate increases from the applicable public utility commissions, the difficulty of financing large construction programs, increased competition, reductions in estimates of future demand for electricity in certain areas of the country, the limitations on operations and increased costs and delays attributable to environmental considerations, the difficulty of the capital market in absorbing utility debt, the

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difficulty in obtaining fuel at reasonable prices and the effect of energy conservation. All of such issuers have been experiencing certain of these problems in varying degrees. In addition, Federal, state and municipal governmental authorities may from time to time review existing, and impose additional, regulations governing the licensing, construction and operation of nuclear power plants, which may adversely affect the ability of the issuers of certain of the Bonds in a Trust to make payments of principal and/or interest on such Bonds.

TRANSPORTATION FACILITY REVENUE BONDS. Some of the Bonds in a Trust may be obligations of issuers which are payable from and secured by revenues derived from the ownership and operation of airports, public transit systems and ports. The major portion of an airport's gross operating income is generally derived from fees received from airlines pursuant to use agreements which consist of annual payments for airport use, occupancy of certain terminal space, service fees and leases. Airport operating income may therefore be affected by the ability of the airlines to meet their obligations under the use agreements. The air transport industry is experiencing significant variations in earnings and traffic, due to increased competition, excess capacity, increased costs, deregulation, traffic constraints and other factors, and several airlines are experiencing severe financial difficulties. In particular, facilities with use agreements involving airlines experiencing financial difficulty may experience a reduction in revenue due to the possible inability of these airlines to meet their use agreement obligations because of such financial difficulties and possible bankruptcy. The Sponsor cannot predict what effect these industry conditions may have on airport revenues which are dependent for payment on the financial condition of the airlines and their usage of the particular airport facility. Bonds that are secured primarily by the revenue collected by a public transit system typically are additionally secured by a pledge of sales tax receipts collected at the state or local level, or of other governmental financial assistance. Transit system net revenues will be affected by variations in utilization, which in turn may be affected by the degree of local governmental subsidization, demographic and population shifts, and competition from other forms of transportation; and by increased costs, including costs resulting from previous deferrals of maintenance. Port authorities derive their revenues primarily from fees imposed on ships using the facilities. The rate of utilization of such facilities may fluctuate depending on the local economy and on competition from competing forms of transportation such as air, rail and trucks.

WATER AND/OR SEWERAGE OBLIGATIONS. Some of the Bonds in a Trust may be obligations of issuers whose revenues are derived from the sale of water and/or sewerage services. Such Bonds are generally payable from user fees. The problems of such issuers include the ability to obtain timely and adequate rate increases, population decline resulting in decreased user fees, the difficulty of financing large construction programs, the limitations on operations and increased costs and delays attributable to environmental considerations, the increasing difficulty of obtaining or discovering new supplies of fresh water, the effect of conservation programs and the impact of "no-growth" zoning ordinances. All of such issuers have been experiencing certain of these problems in varying degrees.

UNIVERSITY AND COLLEGE REVENUE OBLIGATIONS. Some of the Bonds in a Trust may be obligations of issuers which are, or which govern the operation of, colleges and universities and whose revenues are derived mainly from tuition, dormitory revenues, grants and endowments. General problems of such issuers include the prospect of a declining percentage of the population consisting of "college" age individuals, possible inability to raise tuitions and fees sufficiently to cover increased operating costs, the uncertainty of continued receipt of Federal grants and state funding, and government legislation or regulations which may adversely affect the revenues or costs of such issuers. All of such issuers have been experiencing certain of these problems in varying degrees.

BRIDGE AUTHORITY AND TOLLROAD OBLIGATIONS. Some of the Bonds in a Trust may be obligations of issuers which derive their payments from bridge, road or tunnel toll revenues. The revenues of such an issuer could be adversely affected by competition from toll-free vehicular bridges and roads and alternative modes of transportation. Such revenues could also be adversely affected by a reduction in the availability of fuel to motorists or significant increases in the costs thereof. Specifically, governmental regulations restricting the use of vehicles in the New York City metropolitan area may adversely affect revenues of the Triborough Bridge and Tunnel Authority.

DEDICATED-TAX SUPPORTED BONDS. Some of the Bonds in a Trust may be obligations of issuers which are payable from and secured by tax revenues from a designated source, which revenues are pledged to secure the bonds. The various types of Bonds described below differ in structure and with respect to the rights of the bondholders to the underlying property. Each type of dedicated-tax supported Bond has distinct risks, only some of which are set forth below. One type of dedicated-tax supported Bond is secured by the incremental tax received on either real property or on sales within a specifically defined geographical area; such tax generally will not provide bondholders with a lien on the underlying property or revenues. Another type of dedicated-tax supported Bond is secured by a special tax levied on real property within a defined geographical area in such a manner that the tax is levied on those who benefit from the project; such bonds typically provide for a statutory lien on the underlying property for unpaid taxes. A third type of dedicated-tax supported Bond may be secured by a tax levied upon the manufacture, sale or consumption of commodities or upon the license to pursue certain occupations or

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upon corporate privileges within a taxing jurisdiction. As to any of these types of Bonds, the ability of the designated revenues to satisfy the interest and principal payments on such bonds may be affected by changes in the local economy, the financial success of the enterprise responsible for the payment of the taxes, the value of any property on which taxes may be assessed and the ability to collect such taxes in a timely fashion. Each of these factors will have a different affect on each distinct type of dedicated-tax supported bonds.

MUNICIPAL LEASE BONDS. Some of the Bonds in a Trust may be obligations that are secured by lease payments of a governmental entity. Such payments are normally subject to annual budget appropriations of the leasing governmental entity. A governmental entity that enters into such a lease agreement cannot obligate future governments to appropriate for and make lease payments but covenants to take such action as is necessary to include any lease payments due in its budgets and to make the appropriations therefor. A governmental entity's failure to appropriate for and to make payments under its lease obligation could result in insufficient funds available for payment of the obligations secured thereby.

ORIGINAL ISSUE DISCOUNT BONDS AND STRIPPED OBLIGATIONS. Certain of the Bonds in a Trust may be original issue discount bonds. These Bonds were issued with nominal interest rates less than the rates then offered by comparable securities and as a consequence were originally sold at a discount from their face, or par, values. This original issue discount, the difference between the initial purchase price and face value, is deemed under current law to accrue on a daily basis and the accrued portion is treated as tax-exempt interest income for federal income tax purposes. On sale or redemption, gain, if any, realized in excess of the earned portion of original issue discount will be taxable as capital gain. See "What is the Tax Status of Unitholders". The current value of an original issue discount bond reflects the present value of its face amount at maturity. In a stable interest rate environment, the market value of an original issue discount bond would tend to increase more slowly in early years and in greater increments as the bond approached maturity.

Certain of the original issue discount bonds in a Trust may be zero coupon bonds. Zero coupon bonds do not provide for the payment of any current interest; the buyer receives only the right to receive a final payment of the face amount of the bond at its maturity. The effect of owning a zero coupon bond is that a fixed yield is earned not only on the original investment but also, in effect, on all discount earned during the life of the obligation. This implicit reinvestment of earnings at the same rate eliminates the risk of being unable to reinvest the income on such obligation at a rate as high as the implicit yield, but at the same time also eliminates the holder's ability to reinvest at higher rates in the future. For this reason, zero coupon bonds are subject to substantially greater price fluctuations during periods of changing market interest rates than are securities of comparable quality that pay interest currently.

Original issue discount bonds, including zero coupon bonds, may be subject to redemption at prices based on the issue price plus the amount of original issue discount accreted to redemption (the "accreted value") plus, if applicable, some premium. Pursuant to such call provisions an original issue discount bond may be called prior to its maturity date at a price less than its face value. See the "Schedules of Investments" for more information about the call provisions of portfolio Bonds.

Certain of the Bonds in a Trust may be Stripped Obligations, which represent evidences of ownership with respect to either the principal amount of or a payment of interest on a tax-exempt obligation. An obligation is "stripped" by depositing it with a custodian, which then effects a separation in ownership between the bond and any interest payment which has not yet become payable, and issues evidences of ownership with respect to such constituent parts. A Stripped Obligation therefore has economic characteristics similar to zero coupon bonds, as described above.

Each Stripped Obligation has been purchased at a discount from the amount payable at maturity. With respect to each Unitholder, the Internal Revenue Code treats as "original issue discount" that portion of the discount which produces a yield to maturity (as of the date of purchase of the Unitholder's Units) equal to the lower of the coupon rate of interest on the underlying obligation or the yield to maturity on the basis of the purchase price of the Unitholder's Units which is allocable to each Stripped Obligation. Original issue discount which accrues with respect to a Stripped Obligation will be exempt from Federal income taxation to the same extent as interest on the underlying obligations. (See "WHAT IS THE TAX STATUS OF UNITHOLDERS?" in Part B of this Prospectus.)

Unitholders should consult their own tax advisers with respect to the state and local tax consequences of owning original issue discount bonds or Stripped Obligations. Under applicable provisions governing determination of state and local taxes, interest on original issue discount bonds or Stripped Obligations may be deemed to be received in the year of accrual even though there is no corresponding cash payment.

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WHY AND HOW ARE THE BONDS INSURED?

INSURANCE ON BONDS

INSURED TRUSTS--The Insurer's policy unconditionally and irrevocably guarantees the full and complete payment required to be made by or on behalf of the Issuer to the Paying Agent or its successor of an amount equal to (i) the principal of (either at the stated maturity or by an advancement of maturity pursuant to a mandatory sinking fund payment) and interest on, the Bonds as such payments shall become due but shall not be so paid (except that in the event of any acceleration of the due date of such principal by reason of mandatory or optional redemption or acceleration resulting from default or otherwise, other than any advancement of maturity pursuant to a mandatory sinking fund payment, the payments guaranteed by the Insurer's policy shall be made in such amounts and at such times as such payments of principal would have been due had there not been any such acceleration); and (ii) the reimbursement of any such payment which is subsequently removed from any owner of the Bonds pursuant to a final judgment by a court of competent jurisdiction that such payment constitutes an avoidable preference to such owner within the meaning of any applicable bankruptcy law (a "Preference").

The Insurer's policy does not insure against loss of any prepayment premium which may at any time be payable with respect to any Bond. The Insurer's policy does not, under any circumstance, insure against loss relating to: (i) optional or mandatory redemptions (other than mandatory sinking fund redemptions); (ii) any payments to be made on an accelerated basis; (iii) payments of the purchase price of Bonds upon tender by an owner thereof; or (iv) any Preference relating to (i) through (iii) above. The Insurer's policy also does not insure against nonpayment of principal of or interest on the Bonds resulting from the insolvency, negligence or any other act or omission of the Paying Agent or any other paying agent for the Bonds.

Upon receipt of telephonic or telegraphic notice, such notice subsequently confirmed in writing by registered or certified mail, or upon receipt of written notice by registered or certified mail, by the Insurer from the Paying Agent or any owner of a Bond the payment of an insured amount for which is then due, that such required payment has not been made, the Insurer on the due date of such payment or within one business day after receipt of notice of such nonpayment, whichever is later, will make a deposit of funds, in an account with State Street Bank and Trust Company, N.A., in New York, New York, or its successor, sufficient for the payment of any such insured amounts which are then due. Upon presentment and surrender of such Bonds or presentment of such other proof of ownership of the Bonds, together with any appropriate instruments of assignment to evidence the assignment of the insured amounts due on the Bonds as are paid by the Insurer, and appropriate instruments to effect the appointment of the Insurer as agent for such owners of the Bonds in any legal proceeding related to payment of insured amounts on the Bonds, such instruments being in a form satisfactory to State Street Bank and Trust Company, N.A., State Street Bank and Trust Company, N.A. shall disclose to such owners or the Paying Agent payment of the insured amounts due on such Bonds, less any amount held by the Paying Agent for the payment of such insured amounts and legally available therefor.

The Insurer is the principal operating subsidiary of MBIA, Inc., a New York Stock Exchange listed company. MBIA Inc. is not obligated to pay the debts of or claims against the Insurer. The Insurer is domiciled in the State of New York and licensed to do business in and subject to regulation under the laws of all 50 states, the District of Columbia, the Commonwealth of Puerto Rico, the Commonwealth of the Northern Mariana Islands, the Virgin Islands of the United States and the Territory of Guam. The Insurer has two European branches, one in the Republic of France and the other in the Kingdom of Spain. New York has laws prescribing minimum capital requirements, limiting classes and concentrations of investments and requiring the approval of policy rates and forms. State laws also regulate the amount of both the aggregate and individual risks that may be insured, the payment of dividends by the Insurer, changes in control and transactions among affiliates. Additionally, the Insurer is required to maintain contingency reserves on its liabilities in certain amounts and for certain periods of time.

As of December 31, 1995 the Insurer had admitted assets of $3.8 billion (audited), total liabilities of $2.5 billion (audited), and total capital and surplus of $1.3 billion (audited) determined in accordance with statutory accounting practices prescribed or permitted by insurance regulatory authorities. As of December 31, 1996, the Insurer had admitted assets of $4.4 billion (audited), total liabilities of $3.0 billion (audited), and total capital and surplus of $1.4 billion (audited) determined in accordance with statutory accounting practices prescribed or permitted by insurance regulatory authorities.

Furthermore, copies of the Insurer's year end financial statements prepared in accordance with statutory accounting practices are available without charge from the Insurer. A copy of the Annual Report on Form 10-K of MBIA, Inc. is available from the Insurer or the Securities and Exchange Commission. The address of the Insurer is 113 King Street, Armonk, New York 10504. The telephone number of the Insurer is (914) 273-4545.

Moody's Investors Service rates the claims paying ability of the Insurer "Aaa".

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Standard & Poor's Ratings Service, a division of the McGraw Hill Companies, Inc., rates the claims paying ability of the Insurer "AAA".

Fitch Investors Service, L.P., rates the claims paying ability of the Insurer "AAA".

Each rating of the Insurer should be evaluated independently. The ratings reflect the respective rating agency's current assessment of the creditworthiness of the Insurer and its ability to pay claims on its policies of insurance. Any further explanation as to the significance of the above ratings may be obtained only from the applicable rating agency.

The above ratings are not recommendations to buy, sell or hold the Bonds, and such ratings may be subject to revision or withdrawal at any time by the rating agencies. Any downward revision or withdrawal of any of the above ratings may have an adverse effect on the market price of the Bonds. The Insurer does not guaranty the market price of the Bonds nor does it guaranty that the ratings on the Bonds will not be revised or withdrawn.

TRADITIONAL TRUSTS--Insurance guaranteeing the timely payment, when due, of all principal and interest on certain Bonds in a Traditional Trust may have been obtained by the Sponsor, issuer or underwriter of the particular Bonds involved or by another party. Such insurance, which provides coverage substantially the same as that obtained with respect to Bonds in Insured Trusts as described above, is effective so long as the insured Bond is outstanding and the insurer remains in business. Insurance relates only to the particular Bond and not to the Units offered hereby or to their market value. Insured Bonds have received a rating of "Aaa" by Moody's Investors Service, Inc. and/or "AAA" by Standard & Poor's Corporation in recognition of such insurance.

If a Bond in a Traditional Trust is insured, the Schedule of Investments in Part A of this Prospectus will identify the insurer. Such insurance will be provided by Financial Guaranty Insurance Company ("FGIC"), AMBAC Indemnity Corporation ("AMBAC"), Bond Investors Guaranty Insurance Company, now known as MBIA Corp. of Illinois ("BIG"), Capital Guaranty Insurance Company ("CGIC"), Financial Security Assurance, Inc. ("FSA"), Municipal Bond Insurance Association (the "Association"), MBIA Insurance Corporation ("MBIA") or Connie Lee Insurance Company ("ConnieLee"). The Sponsor to date has purchased and presently intends to purchase insurance for Bonds in Traditional Trusts exclusively from MBIA (see the preceding disclosure regarding MBIA). There can be no assurance that any insurer listed therein will be able to satisfy its commitments in the event claims are made in the future. However, Standard & Poor's Corporation has rated the claims-paying ability of each insurer "AAA," and Moody's Investors Service has rated all bonds insured by each such insurer, except ConnieLee, "Aaa." Moody's Investor's Service gives no ratings for bonds insured by ConnieLee.

Because any such insurance will be effective so long as the insured Bonds are outstanding, such insurance will be taken into account in determining the market value of such Bonds and therefore some value attributable to such insurance will be included in the value of the Units of the Trust that includes such Bonds. The insurance does not, however, guarantee the market value of the Bonds or of the Units.

ACCUMULATION PLAN

The Sponsor, John Nuveen & Co. Incorporated, is also the principal underwriter of the Accumulation Funds listed in the following table. Each of these funds is an open-end, diversified management investment company into which Unitholders may choose to reinvest Trust distributions automatically, without any sales charge. Unitholders may reinvest both interest and principal distributions or principal distributions only. Each Accumulation Fund has investment objectives which differ in certain respects from those of the Trusts and may invest in securities which would not be eligible for deposit in the Trusts. The investment adviser to each Accumulation Fund is a wholly-owned subsidiary of the Sponsor. Unitholders should contact their financial adviser or the Sponsor to determine which of the Accumulation Funds they may reinvest into, as reinvestment in certain of the Accumulation Funds may be restricted to residents of a particular state or states. Unitholders may obtain a prospectus for each Accumulation Fund through their financial adviser or through the Sponsor at (800) 621-7227. For a more detailed description, Unitholders should read the prospectus of the Accumulation Fund in which they are interested.

The following is a complete list of the Accumulation Funds currently available, as of the Date of Deposit of this Prospectus, to Unitholders under the Accumulation Plan. The list of available Accumulation Funds is subject to change without the consent of any of the Unitholders.

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ACCUMULATION FUNDS

MUTUAL FUNDS

NUVEEN FLAGSHIP MUNICIPAL TRUST

Nuveen Municipal Bond Fund
Nuveen Insured Municipal Bond Fund Nuveen Flagship All-American Municipal Bond Fund Nuveen Flagship Limited Term Municipal Bond Fund Nuveen Flagship Intermediate Municipal Bond Fund

NUVEEN FLAGSHIP MULTISTATE TRUST I

Nuveen Flagship Arizona Municipal Bond Fund Nuveen Flagship Colorado Municipal Bond Fund Nuveen Flagship Florida Municipal Bond Fund Nuveen Flagship Florida Intermediate Municipal Bond Fund Nuveen Maryland Municipal Bond Fund Nuveen Flagship New Mexico Municipal Bond Fund Nuveen Flagship Pennsylvania Municipal Bond Fund Nuveen Flagship Virginia Municipal Bond Fund

NUVEEN FLAGSHIP MULTISTATE TRUST II

Nuveen California Municipal Bond Fund Nuveen California Insured Municipal Bond Fund Nuveen Flagship Connecticut Municipal Bond Fund Nuveen Massachusetts Municipal Bond Fund Nuveen Massachusetts Insured Municipal Bond Fund Nuveen Flagship New Jersey Municipal Bond Fund Nuveen Flagship New Jersey Intermediate Municipal Bond Fund Nuveen Flagship New York Municipal Bond Fund Nuveen New York Insured Municipal Bond Fund

NUVEEN FLAGSHIP MULTISTATE TRUST III

Nuveen Flagship Alabama Municipal Bond Fund Nuveen Flagship Georgia Municipal Bond Fund Nuveen Flagship Louisiana Municipal Bond Fund Nuveen Flagship North Carolina Municipal Bond Fund Nuveen Flagship South Carolina Municipal Bond Fund Nuveen Flagship Tennessee Municipal Bond Fund

NUVEEN FLAGSHIP MULTISTATE TRUST IV

Nuveen Flagship Kansas Municipal Bond Fund Nuveen Flagship Kentucky Municipal Bond Fund Nuveen Flagship Kentucky Limited Term Municipal Bond Fund Nuveen Flagship Michigan Municipal Bond Fund Nuveen Flagship Missouri Municipal Bond Fund Nuveen Flagship Ohio Municipal Bond Fund Nuveen Flagship Wisconsin Municipal Bond Fund

Flagship Utility Income Fund

Nuveen Growth and Income Stock Fund

Nuveen Balanced Stock and Bond Fund

Nuveen Balanced Municipal and Stock Fund

MONEY MARKET FUNDS

Nuveen California Tax-Free Money Market Fund

Nuveen Massachusetts Tax-Free Money Market Fund

Nuveen New York Tax-Free Money Market Fund

Nuveen Tax-Free Reserves, Inc.

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Nuveen Tax-Exempt Money Market Fund, Inc.

Each person who purchases Units of a Trust may become a participant in the Accumulation Plan and elect to have his or her distributions on Units of the Trust invested directly in shares of one of the Accumulation Funds. Reinvesting Unitholders may select any interest distribution plan. Thereafter, each distribution of interest income or principal on the participant's Units (principal only in the case of a Unitholder who has chosen to reinvest only principal distributions) will, on the applicable distribution date, or the next day on which the New York Stock Exchange is normally open ("business day") if the distribution date is not a business day, automatically be received by the transfer agent for each of the Accumulation Funds, on behalf of such participant and applied on that date to purchase shares (or fractions thereof) of the Accumulation Fund chosen at net asset value as computed as of 4:00 p.m. eastern time on each such date. All distributions will be reinvested in the Accumulation Fund chosen and no part thereof will be retained in a separate account. These purchases will be made without a sales charge.

The Transfer Agent of the Accumulation Fund will mail to each participant in the Accumulation Plan a quarterly statement containing a record of all transactions involving purchases of Accumulation Fund shares (or fractions thereof) with Trust interest distributions or as a result of reinvestment of Accumulation Fund dividends. Any distribution of principal used to purchase shares of an Accumulation Fund will be separately confirmed by the Transfer Agent. Unitholders will also receive distribution statements from the Trustee detailing the amounts transferred to their Accumulation Fund accounts.

Participants may at any time, by so notifying the Trustee in writing, elect to change the Accumulation Fund into which their distributions are being reinvested, to change from principal only reinvestment to reinvestment of both principal and interest or vice versa, or to terminate their participation in the Accumulation Plan altogether and receive future distributions on their Units in cash. There will be no charge or other penalty for such change of election or termination. The character of Trust distributions for income tax purposes will remain unchanged even if they are reinvested in an Accumulation Fund.

INFORMATION ABOUT THE SPONSOR

Founded in 1898, Nuveen is the oldest and largest investment banking firm specializing in the underwriting and distribution of tax-exempt securities and maintains the largest research department in the investment banking community devoted exclusively to the analysis of municipal securities. In 1961, Nuveen began sponsoring the Nuveen Tax-Free Unit Trust and since that time has issued more than $36 billion in tax-exempt unit trusts, including over $12 billion in tax-exempt insured unit trusts. The Sponsor is also principal underwriter of the registered open-end investment companies set forth herein under "Accumulation Plan" as well as for the Golden Rainbow A James Advised Mutual Fund, and acted as co-managing underwriter of Nuveen Municipal Value Fund, Inc., Nuveen California Municipal Value Fund, Inc., Nuveen New York Municipal Value Fund, Inc., Nuveen Municipal Income Fund, Inc., Nuveen Premium Income Municipal Fund, Inc., Nuveen Performance Plus Municipal Fund, Inc., Nuveen California Performance Plus Municipal Fund, Inc., Nuveen New York Performance Plus Municipal Fund, Inc., Nuveen Municipal Advantage Fund, Inc., Nuveen Municipal Market Opportunity Fund, Inc., Nuveen California Municipal Market Opportunity Fund, Inc., Nuveen Investment Quality Municipal Fund, Inc., Nuveen California Investment Quality Municipal Fund, Inc., Nuveen New York Investment Quality Municipal Fund, Inc., Nuveen Insured Quality Municipal Fund, Inc., Nuveen Florida Investment Quality Municipal Fund, Nuveen Pennsylvania Investment Quality Municipal Fund, Nuveen New Jersey Investment Quality Municipal Fund, Inc., and the Nuveen Select Quality Municipal Fund, Inc., Nuveen California Select Quality Municipal Fund, Inc., Nuveen New York Select Quality Municipal Fund, Inc., Nuveen Quality Income Municipal Fund, Inc., Nuveen Insured Municipal Opportunity Fund, Inc., Nuveen Florida Quality Income Municipal Fund, Nuveen Michigan Quality Income Municipal Fund, Inc., Nuveen Ohio Quality Income Municipal Fund, Inc., Nuveen Texas Quality Income Municipal Fund, Nuveen California Quality Income Municipal Fund, Inc., Nuveen New York Quality Income Municipal Fund, Inc., Nuveen Premier Municipal Income Fund, Inc., Nuveen Premier Insured Municipal Income Fund, Inc., Nuveen Select Tax-Free Income Portfolio, Nuveen Select Tax-Free Income Portfolio 2, Nuveen Insured California Select Tax-Free Income Portfolio, Nuveen Insured New York Select Tax-Free Income Portfolio, Nuveen Premium Income Municipal Fund 2, Inc., Nuveen Select Tax-Free Income Portfolio 3, Nuveen Select Maturities Municipal Fund, Nuveen Insured California Premium Income Municipal Fund, Inc., Nuveen Arizona Premium Income Municipal Fund, Inc., Nuveen Insured Florida Premium Income Municipal Fund, Nuveen Michigan Premium Income Municipal Fund, Inc., Nuveen New Jersey Premium Income Municipal Fund, Inc., Nuveen Insured New York Premium Income Municipal Fund, Inc., Nuveen Premium Income Municipal Fund 4, Inc., Nuveen Pennsylvania Premium Income Municipal Fund 2, Nuveen Maryland Premium Income Municipal Fund, Nuveen Virginia Premium Income Municipal Fund, Nuveen Massachusetts Premium Income Municipal Fund, Nuveen Insured California Premium Income Municipal Fund 2, Inc., Nuveen Washington Premium Income Municipal Fund, Nuveen Georgia Premium Income Municipal Fund, Nuveen Missouri Premium Income Municipal Fund, Nuveen Connecticut

9

Premium Income Municipal Fund, Nuveen North Carolina Premium Income Municipal Fund, Nuveen California Premium Income Municipal Fund, Nuveen Insured Premium Income Municipal Fund 2, all registered closed-end management investment companies. These registered open-end and closed-end investment companies currently have approximately $35 billion in securities under management. Over 1,000,000 individuals have invested to date in Nuveen's tax-exempt funds and trusts. Nuveen is a subsidiary of The John Nuveen Company which, in turn, is approximately 78% owned by the St. Paul Companies, Inc. ("St. Paul"). St. Paul is located in St. Paul, Minnesota and is principally engaged in providing property-liability insurance through subsidiaries. Nuveen is a member of the National Association of Securities Dealers, Inc. and the Securities Industry Association and has its principal offices located in Chicago (333 W. Wacker Drive) and New York (Swiss Bank Tower, 10 East 50th Street). Nuveen maintains 11 regional offices.

To help advisers and investors better understand and more efficiently use an investment in the Trust to reach their investment goals, the Trust's sponsor, John Nuveen & Co. Incorporated, may advertise and create specific investment programs and systems. For example, such activities may include presenting information on how to use an investment in the Trust, alone or in combination with an investment in other mutual funds or unit investment trusts sponsored by Nuveen, to accumulate assets for future education needs or periodic payments such as insurance premiums. The Trust's sponsor may produce software or additional sales literature to promote the advantages of using the Trust to meet these and other specific investor needs.

The Sponsor offers a program of advertising support to registered broker-dealer firms, banks and bank affiliates ("Firms") that sell Trust Units or shares of Nuveen Open-End Mutual Funds (excluding money-market funds) ("Funds"). Under this program, the Sponsor will pay or reimburse the Firm for up to one half of specified media costs incurred in the placement of advertisements which jointly feature the Firm and the Nuveen Funds and Trusts. Reimbursements to the Firm will be based on the number of the Firm's registered representatives who have sold Fund Shares and/or Trust Units during the prior calendar year according to an established schedule. Reimbursements under this program will be made by the Sponsor and not by the Funds or Trusts.

DESCRIPTION OF RATINGS*

STANDARD & POOR'S CORPORATION. A description of the applicable Standard & Poor's Corporation rating symbols and their meanings follows:

A Standard & Poor's rating is a current assessment of the creditworthiness of an obligor with respect to a specific debt obligation. This assessment may take into consideration obligors such as guarantors, insurers or lessees.

The rating is not a recommendation to purchase, sell or hold a security, inasmuch as it does not comment as to market price or suitability for a particular investor.

The ratings are based on current information furnished by the issuer or obtained by Standard & Poor's from other sources it considers reliable. Standard & Poor's does not perform an audit in connection with any rating and may, on occasion, rely on unaudited financial information. The ratings may be changed, suspended or withdrawn as a result of changes in, or unavailability of, such information, or for other circumstances.

The ratings are based, in varying degrees, on the following considerations:

I. Likelihood of default--capacity and willingness of the obligor as to the timely payment of interest and repayment of principal in accordance with the terms of the obligation;

II. Nature of and provisions of the obligation;

III. Protection afforded by, and relative position of, the obligation in the event of bankruptcy, reorganization or other arrangements under the laws of bankruptcy and other laws affecting creditors' rights.

AAA--This is the highest rating assigned by Standard & Poor's to a debt obligation. Capacity to pay interest and repay principal is extremely strong.

AA--Bonds rated AA have a very strong capacity to pay interest and repay principal, and differ from the highest rated issues only in small degree.

A--Bonds rated A have a strong capacity to pay interest and repay principal, although they are somewhat more susceptible to the adverse effects of changes in circumstances and economic conditions than bonds in higher rated categories.


*As published by the rating companies.

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BBB--Bonds rated BBB are regarded as having an adequate capacity to pay interest and repay principal. Whereas they normally exhibit adequate protection parameters, adverse economic conditions or changing circumstances are more likely to lead to a weakened capacity to pay interest and repay principal for bonds in this category than for bonds in the higher rated categories.

PLUS (+) OR MINUS (-): The ratings from "AA" to "BB" may be modified by the addition of a plus or minus sign to show relative standing within the major rating categories.

PROVISIONAL RATINGS: The letter "p" indicates that the rating is provisional. A provisional rating assumes the successful completion of the project being financed by the issuance of the bonds being rated and indicates that payment of debt service requirements is largely or entirely dependent upon the successful and timely completion of the project. This rating, however, while addressing credit quality subsequent to completion of the project, makes no comment on the likelihood of, or the risk of default upon failure of, such completion. Accordingly, the investor should exercise his own judgment with respect to such likelihood and risk.

NOTE RATINGS: A Standard & Poor's note rating reflects the liquidity
concerns and market access risks unique to notes. Notes due in 3 years or less will likely receive a note rating. Notes maturing beyond 3 years will most likely receive a long-term debt rating.

Note rating symbols are as follows:

SP-1 Very strong or strong capacity to pay principal and interest.
Those issues determined to possess overwhelming safety characteristics will be given a plus (+) designation.

SP-2 Satisfactory capacity to pay principal and interest.

MOODY'S INVESTORS SERVICE, INC. A brief description of the applicable Moody's Investors Service, Inc. rating symbols and their meanings follows:

Aaa--Bonds which are rated Aaa are judged to be the best quality. They carry the smallest degree of investment risk and are generally referred to as "gilt edge." Interest payments are protected by a large or by an exceptionally stable margin and principal is secure. While the various protective elements are likely to change, such changes as can be visualized are most unlikely to impair the fundamentally strong position of such issues. Their safety is so absolute that, with the occasional exception of oversupply in a few specific instances, characteristically, their market value is affected solely by money market fluctuations.

Aa--Bonds which are rated Aa are judged to be of high quality by all standards. Together with the Aaa group they comprise what are generally known as high grade bonds. They are rated lower than the best bonds because margins of protection may not be as large as in Aaa securities or fluctuations of protective elements may be of greater amplitude or there may be other elements present which make the long-term risks appear somewhat larger than in Aaa securities. Their market value is virtually immune to all but money market influences, with the occasional exception of oversupply in a few specific instances.

A--Bonds which are rated A possess many favorable investment attributes and are to be considered as upper medium grade obligations. Factors giving security to principal and interest are considered adequate, but elements may be present which suggest a susceptibility to impairment sometime in the future. The market value of A-rated bonds may be influenced to some degree by economic performance during a sustained period of depressed business conditions, but, during periods of normalcy, A-rated bonds frequently move in parallel with Aaa and Aa obligations, with the occasional exception of oversupply in a few specific instances.

Moody's bond rating symbols may contain numerical modifiers of a generic rating classification. The modifier 1 indicates that the bond ranks at the high end of its category; the modifier 2 indicates a mid-range ranking; and the modifier 3 indicates that the issue ranks in the lower end of its generic rating category.

Baa--Bonds which are rated Baa are considered as medium grade obligations,
i.e., they are neither highly protected nor poorly secured. Interest payments and principal security appear adequate for the present but certain protective elements may be lacking or may be characteristically unreliable over any great length of time. Such bonds lack outstanding investment characteristics and in fact have speculative characteristics as well. The market value of Baa-rated bonds is more sensitive to changes in economic circumstances, and aside from occasional speculative factors applying to some bonds of this class, Baa market valuations move in parallel with Aaa, Aa and A obligations during periods of economic normalcy, except in instances of oversupply.

Con. (--)--Bonds for which the security depends upon the completion of some act or the fulfillment of some condition are rated conditionally. These are bonds secured by (a) earnings of projects under construction, (b) earnings of projects unseasoned in operation experience, (c) rentals which begin when facilities are completed, or (d) payments to which some other limiting condition attaches. Parenthetical rating denotes probable credit stature upon completion of construction or elimination of basis of condition.

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NOTE RATINGS:

MIG 1 This designation denotes best quality. There is present strong protection by established cash flows, superior liquidity support or demonstrated broad-based access to the market for refinancing.

MIG 2 This designation denotes high quality. Margins of protection are ample although not so large as in the preceding group.

FITCH INVESTORS SERVICE, INC. A brief description of the applicable Fitch Investors Service, Inc. rating symbols and their meanings follow:

AAA--Bonds considered to be investment grade and of the highest credit quality. The obligor has an exceptionally strong ability to pay interest and repay principal, which is unlikely to be affected by reasonably foreseeable events.

AA--Bonds considered to be investment grade and of very high credit quality. The obligor's ability to pay interest and repay principal is very strong, although not quite as strong as bonds rated AAA. Bonds rated in the AAA and AA categories are not significantly vulnerable to foreseeable future developments.

A--Bonds considered to be investment grade and of high credit quality. The obligor's ability to pay interest and repay principal is considered to be strong, but may be more vulnerable to adverse changes in economic conditions and circumstances than bonds with higher ratings.

BBB--Bonds considered to be investment grade and of satisfactory credit quality. The obligor's ability to pay interest and repay principal is considered to be adequate. Adverse changes in economic conditions and circumstances, however, are more likely to have adverse impact on these bonds, and therefore impair timely payment. The likelihood that the ratings of these bonds will fall below investment grade is higher than for bonds with higher ratings.

To provide more detailed indications of credit quality, the AA, A and BBB ratings may be modified by the addition of a plus or minus sign to show relative standing within these major rating categories.

NOTE RATINGS:

FIN-1 Notes assigned this rating are regarded as having the strongest degree of assurance for timely payment.

FIN-2 Notes assigned this rating reflect a degree of assurance for timely payment only slightly less in degree than the highest category.

HOW THE TRUST COMPARES PERFORMANCE

The Sponsor may compare the estimated returns of the Trust with the returns or yields of other tax-free and taxable investments, often on a taxable equivalent basis. In addition, the Sponsor from time to time may quote various performance measures and studies in order to compare the historical returns available from an investment in municipal securities with investments in both tax-free and taxable securities.

In September 1995, Nuveen Research prepared one such study which compared the after-tax value of $100,000 initially invested in 1975 in various asset classes including municipal bonds, treasury bonds and corporate bonds. As indicated in the chart provided below, the 20-year study shows that municipal bonds significantly outperformed corporate and treasury bonds once the effects of taxes were factored in. In fact, over the 20-year period, municipal bond returns in dollars were more than double those of treasury bonds.

AFTER-TAX VALUE OF $100,000 INVESTED IN 1975*

The graph appearing on this page of the Information Supplement compares after-tax total returns of $100,000 initially in 1975 in each of the Lehman Brothers MuniBond Index, Long-Term Treasury Index and Long-Term Corporate Index. As indicated in the graph, such an investment in the Lehman Brothers MuniBond Index, Long-Term Treasury Index and Long-Term Corporate Index would have appreciated to $448,740, $267,668, and $304,049, respectively at the end of 1994. The graph assumes all proceeds of investment are reinvested at the respective index rates at the time of reinvestment and also assumes that 20% of the assets in each category are turned over annually and proceeds are reinvested in the respective indexes. The tax rates assumed to generate the after-tax total returns were based upon the income and capital gain rates applicable each year from 1975-1994 for an investor who earned the inflation-adjusted equivalents of $400,000 in 1994. In addition, treasury returns were "grossed up" an assumed 5% to take into account the Treasuries' exemption from state income tax. The graph is for illustrative purposes only, and does not represent the return or performance of any Nuveen Tax-Free Unit Trust and is not intended to predict future results.

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* The graph compares after-tax total returns using the Lehman Brothers MuniBond Index, Long-Term Treasury Index and Long-Term Corporate Index. The graph assumes all proceeds of investment are reinvested at the respective index rates at the time of reinvestment and also assumes that 20% of the assets in each category are turned over annually and proceeds are reinvested in the respective indexes. The tax rates assumed to generate the after-tax total returns were based upon the income and capital gain rates applicable each year from 1975-1994 for an investor who earned the inflation-adjusted equivalents of $100,000 in 1994. In addition, treasury returns were "grossed up" an assumed 5% to take into account the Treasuries' exemption from state income tax. The graph is for illustrative purposes only, and does not represent the return or performance of any Nuveen Tax-Free Unit Trust and is not intended to predict future results.

A comparison of the estimated returns of the Trust and the historic performance of municipal bonds to the returns and performance of other investments is one element to consider in making an informed investment decision. Taxable investments have investment characteristics that differ from those of the Trust. U.S. Government bonds are long-term investments backed by the full faith and credit of the U.S. Government and are subject to federal income tax but are exempt from state income taxes. Bank CDs are generally short-term FDIC insured investments, which pay fixed principal and interest but are subject to fluctuating rollover rates. Both bank CDs and corporate bonds are generally subject to both federal and state income taxes. Money market funds are short term investments with stable net asset values, fluctuating yields and special features that enhance liquidity.

HOW TO CALCULATE YOUR ESTIMATED INCOME

The examples provided below illustrate how to calculate the estimated annual income generated by a hypothetical $10,000 investment in each respective Trust. The illustrations assume that the investment was made on the day prior to the date of deposit by an investor electing the monthly distribution plan. These hypothetical examples are for illustrative purposes only and not intended to reflect or predict the results of any actual investment.

EXAMPLE OF HOW TO CALCULATE YOUR ESTIMATED INCOME:

    COLORADO INSURED TRUST 68

    $10,000                       DIVIDED  BY $101.73                        =          98.299
    Investment                              Offering price and                          # of units purchased
    (as of 05/29/97)                        accrued interest

    98.299                       X          $5.0947                          =          $500.80
    # of units purchased                    Annual income per unit                      annual income
                                            (monthly plan)

EXAMPLE OF HOW TO CALCULATE YOUR ESTIMATED INCOME:

    NEW YORK INSURED TRUST 269

    $10,000                       DIVIDED  BY $101.24                        =          98.775
    Investment                              Offering price and                          # of units purchased
    (as of 05/29/97)                        accrued interest

    98.775                       X          $5.2077                          =          $514.39
    # of units purchased                    Annual income per unit                      annual income
                                            (monthly plan)

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APPENDIX A
COLORADO DISCLOSURE

ECONOMIC FACTORS--COLORADO

RESTRICTIONS ON APPROPRIATIONS AND REVENUES. The State Constitution requires that expenditures for any fiscal year not exceed revenues for such fiscal year. By statute, the amount of General Fund revenues available for appropriation is based upon revenue estimates which, together with other available resources, must exceed annual appropriations by the amount of the unappropriated reserve (the "Unappropriated Reserve"). The Unappropriated Reserve requirement for fiscal years 1991, 1992 and 1993 was set at 3% of total appropriations from the General Fund. For fiscal years 1994 and thereafter, the Unappropriated Reserve requirement is set at 4%. In addition to the Unappropriated Reserve, a constitutional amendment approved by Colorado voters in 1992 requires the State and each local government to reserve a certain percentage of its fiscal year spending (excluding bonded debt service) for emergency use (the "Emergency Reserve"). The minimum Emergency Reserve was set at 1% for 1993 and 2% for 1994 and is set at 3% for 1995 and later years. For fiscal year 1992 and thereafter, General Fund appropriations are also limited by statute to an amount equal to the cost of performing certain required reappraisals of taxable property plus an amount equal to the lesser of (i) five percent of Colorado personal income or (ii) 106% of the total General Fund appropriations for the previous fiscal year. This restriction does not apply to any General Fund appropriations which are required as a result of a new federal law, a final state or federal court order or moneys derived from the increase in the rate or amount of any tax or fee approved by a majority of the registered electors of the State voting at any general election. In addition, the statutory limit on the level of General Fund appropriations may be exceeded for a given fiscal year upon the declaration of a State fiscal emergency by the State General Assembly.

According to the Colorado Economic Perspective, Fourth Quarter, Fiscal Year 1996, June 20, 1996 (the "1996 Economic Report"), which is published by the Office of State Planning and Budgeting, the fiscal year 1995 ending General Fund balance was $488.5 million, which was $262.4 million over the combined Unappropriated Reserve and Emergency Reserve requirement. The 1994 fiscal year ending General Fund balance was $405.1 million, or $234.0 million over the required Unappropriated Reserve and Emergency Reserve. Based on the 1996 Economic Report estimates, the fiscal year 1996 ending General Fund balance is expected to be approximately $315.2 million, or $158.6 million over the required Unappropriated Reserve and Emergency Reserve.

On November 3, 1992, voters in Colorado approved a constitutional amendment (the "Amendment") which, in general, became effective December 31, 1992, and restricts the ability of the State and local governments to increase revenues and impose taxes. The Amendment applies to the State and all local governments, including home rule entities ("Districts"). Enterprises, defined as government-owned businesses authorized to issue revenue bonds and receiving under 10% of annual revenue in grants from all Colorado state and local governments combined, are excluded from the provisions of the Amendment.

The provisions of the Amendment are unclear and have required judicial interpretation. Among other provisions, beginning November 4, 1992, the Amendment requires voter approval prior to tax increases, the imposition of a new tax, creation of debt, or mill levy or valuation for assessment ratio increases. The Amendment also limits increases in government spending and property tax revenues to specified percentages. The Amendment requires that District property tax revenues yield no more than the prior year's revenues adjusted for inflation, voter approved changes and (except with regard to school districts) local growth in property values according to a formula set forth in the Amendment. School districts are allowed to adjust tax levies for changes in student enrollment. Pursuant to the Amendment, local government spending is to be limited by the same formula as the limitation for property tax revenues. The Amendment limits increases in expenditures from the State General Fund and program revenues (cash funds) to the growth in inflation plus the percentage change in State population in the prior calendar year. The bases for initial spending and revenue limits are fiscal year 1992 spending and 1991 property taxes collected in 1992. The bases for spending and revenue limits for fiscal year 1994 and later years will be the prior fiscal year's spending and property taxes collected in the prior calendar year. Debt service changes, reductions and voter-approved revenue changes are excluded from the calculation bases. The Amendment also prohibits new or increased real property transfer taxes, new State real property taxes and local District income taxes.

Litigation concerning several issues relating to the Amendment has been brought in the Colorado courts. The litigation deals with three principal issues: (i) whether Districts can increase mill levies to pay debt service on general obligation bonds without obtaining voter approval; (ii) whether a multi-year lease-purchase agreement subject to annual appropriation is an obligation which requires voter approval prior to execution of the agreement;

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and (iii) what constitutes an "enterprise" which is excluded from the provisions of the Amendment. In September, 1994, the Colorado Supreme Court held that Districts can increase mill levies to pay debt service on general obligation bonds issued after the effective date of the Amendment; in June, 1995 the Colorado Supreme Court validated mill levy increases to pay general obligation bonds issued prior to the Amendment. In late 1994, the Colorado Court of Appeals held that multi-year lease-purchase agreements subject to annual appropriation do not require voter approval. The time to file an appeal in that case has expired. Finally, in May, 1995, the Colorado Supreme Court ruled that entities with the power to levy taxes may not themselves be "enterprises" for purposes of the Amendment; however, the Court did not address the issue of how valid enterprises may be created. Many Colorado local governments interpret this decision to mean that a government with taxing power cannot be an enterprise but that a business activity (such as a utility) owned by such a government can be. Additional litigation in the "enterprise" arena may be filed in the future to clarify these issues. Litigation is currently pending before the Colorado Supreme Court as to whether voters can authorize a government to keep and spend all revenues received in excess of the spending limits. Other aspects of the spending limit are being litigated in district court actions.

According to the 1996 Economic Report, for fiscal year 1994, general fund revenues (adjusted for cash funds that are exempt from the Amendment) were $3,681.4 million and program revenues (cash funds) were $1,703.7 million, for revenues totaling $5,385.1 million. During calendar year 1993, population and inflation grew at rates of 4.2% and 2.9%, respectively, for a combined total limit of 7.1%. Accordingly, under the Amendment, increases in State expenditures during the 1995 fiscal year could not exceed $5,767.5 million and the actual 1995 general fund and program revenues of $5,757.3 million were under the limit. The limitation for fiscal year 1996 is 7.0% over revenues during the 1995 fiscal year; accordingly, 1996 fiscal year revenues cannot exceed $6,160.3 million. Fiscal year 1996 revenues are estimated to be $6,087.2 million which is $73.2 million under the limitation. The limitation for the 1997 fiscal year is currently projected to be 6.6% which translates to a revenue limit of approximately $6,488.9 million for fiscal year 1997.

There is also a statutory restriction on the amount of annual increases in taxes that the various taxing jurisdictions in Colorado can levy without electoral approval. This restriction does not apply to taxes levied to pay general obligation debt.

STATE FINANCES. As the State experienced revenue shortfalls in the mid-1980s, it adopted various measures, including impoundment of funds by the Governor, reduction of appropriations by the General Assembly, a temporary increase in the sales tax, deferral of certain tax reductions and inter-fund borrowings. According to State of Colorado Audited Financial Reports, on a GAAP basis, the State had unrestricted General Fund ending balances at June 30 of approximately $16.3 million in fiscal year 1991, $133.3 million in fiscal year 1992, $326.8 million in fiscal year 1993, $320.4 million in fiscal year 1994 and $408.0 million for fiscal year 1995. The 1996 Economic Report projects the unrestricted General Fund ending balance to be approximately $315.2 million for fiscal year 1996.

For fiscal year 1995, the following tax categories generated the following percentages of the State's $3,996.4 million total revenues (accrual basis); individual income taxes represented 52.7% of gross fiscal year 1995 receipts; sales, use, and other excise taxes represented 32.9% of gross fiscal year 1995 receipts; and corporate income taxes represented 4.8% of gross fiscal year 1995 receipts. For fiscal year 1996, General Fund revenues of approximately $4,239.9 million are projected, and appropriations of approximately $4,413.2 million are projected. The percentages of General Fund revenue generated by type of tax for fiscal year 1996 are not expected to be significantly different from fiscal year 1995 percentages.

STATE DEBT. Under its constitution, the State of Colorado is not permitted to issue general obligation bonds secured by the full faith and credit of the State. However, certain agencies and instrumentalities of the State are authorized to issue bonds secured by revenues from specific projects and activities. The State enters into certain lease transactions which are subject to annual renewal at the option of the State. In addition, the State is authorized to issue short-term revenue anticipation notes. Local governmental units in the State are also authorized to incur indebtedness. The major source of financing for such local government indebtedness is an ad valorem property tax. In addition, in order to finance public projects, local governments in the State can issue revenue bonds payable from the revenues of a utility or enterprise or from the proceeds of an excise tax, or assessment bonds payable from special assessments. Colorado local governments can also finance public projects through leases which are subject to annual appropriation at the option of the local government. Local governments in Colorado also issue tax anticipation notes. The Amendment requires prior voter approval for the creation of any multiple fiscal year debt or other financial obligation whatsoever, except for refundings at a lower rate or obligations of an enterprise.

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STATE ECONOMY. Based on estimates published by the State of Colorado, Office of State Planning and Budgeting as presented in the 1996 Economic Report, nearly 55% of non-agricultural employment in Colorado in 1995 was concentrated in the retail and wholesale trade and service sectors, reflecting the importance of tourism to the State's economy and of Denver as a regional economic and transportation hub. The government and manufacturing sectors followed as the next largest employment sectors in the State, representing approximately 16.5% and 10.4%, respectively, of non-agricultural employment in the State in 1995. The Office of Planning and Budgeting projects similar concentrations for calendar years 1996 and 1997.

According to the 1996 Economic Report for Colorado, the unemployment rate remained unchanged from an average of 4.2% from calendar years 1994 to 1995, and total retail sales increased by 5.1% during calendar year 1995. Colorado continued to surpass the employment growth rate of the U.S., with a 4.7% rate of growth for Colorado in calendar year 1995, as compared with 2.3% for the nation as a whole. However, according to the 1996 Economic Report, the rate of job growth in Colorado is projected to be lower in 1996 than the 1995 rate as a result of layoffs at various companies.

Personal income rose 7.7% in Colorado during 1995, as compared with an increase of 6.1% for the nation as a whole.

COLORADO TAXABLE ESTIMATED CURRENT RETURN TABLE

The following tables show the approximate taxable estimated current returns for individuals that are equivalent to tax-exempt estimated current returns under combined Federal and state taxes, using published 1997 marginal Federal tax rates and marginal state tax rates currently available and scheduled to be in effect. The tables incorporate increased tax rates for higher-income taxpayers that were included in the Revenue Reconciliation Act of 1993. The table assumes that federal taxable income is equal to state income subject to tax, and for cases in which more than one state rate falls within a Federal bracket, the state rate corresponding to the highest income within that Federal bracket is used. The combined state and Federal tax brackets shown reflect the fact that state tax payments are currently deductible for Federal tax purposes. The tables do not reflect any local taxes or any taxes other than personal income taxes. The tables illustrate what you would have to earn on taxable investments to equal the tax-exempt estimated current return for your income tax bracket. A taxpayer's marginal tax rate is affected by both his taxable income and his adjusted gross income. Locate your adjusted gross and your taxable income (which is your adjusted gross income reduced by any deductions and exemptions), then locate your tax bracket based on joint or single tax filing. Read across to the equivalent taxable estimated current return you would need to match the tax-free income.

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COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS

                 FEDERAL
   FEDERAL      ADJUSTED      COMBINED
   TAXABLE        GROSS       STATE AND                    TAX-FREE ESTIMATED CURRENT RETURN
   INCOME        INCOME        FEDERAL       --------------------------------------------------------------
  (1,000'S)     (1,000'S)     TAX RATE1      4.25%   4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%
------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
$     0- 41.2 $    0-121.20      19.5   %     5.28    5.59    5.90    6.21    6.52    6.83    7.14    7.45
   41.2- 99.6      0-121.20      31.5         6.20    6.57    6.93    7.30    7.66    8.03    8.39    8.76
              121.20-181.80      32.5         6.30    6.67    7.04    7.41    7.78    8.15    8.52    8.89
  99.6-151.75      0-121.20      34.5         6.49    6.87    7.25    7.63    8.02    8.40    8.78    9.16
              121.20-181.80      35.5         6.59    6.98    7.36    7.75    8.14    8.53    8.91    9.30
              181.80-304.30      38.0         6.85    7.26    7.66    8.06    8.47    8.87    9.27    9.68
151.75-271.05 121.20-181.80      40.5         7.14    7.56    7.98    8.40    8.82    9.24    9.66   10.08
              181.80-304.30      43.5         7.52    7.96    8.41    8.85    9.29    9.73   10.18   10.62
                Over 304.30      40.5   2     7.14    7.56    7.98    8.40    8.82    9.24    9.66   10.08
  Over 271.05 181.80-304.30      47.5         8.10    8.57    9.05    9.52   10.00   10.48   10.95   11.43
                Over 304.30      44.0   3     7.59    8.04    8.48    8.93    9.38    9.82   10.27   10.71

COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION

                 FEDERAL
   FEDERAL      ADJUSTED      COMBINED
   TAXABLE        GROSS       STATE AND                    TAX-FREE ESTIMATED CURRENT RETURN
   INCOME        INCOME        FEDERAL       --------------------------------------------------------------
  (1,000'S)     (1,000'S)     TAX RATE1      4.25%   4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%
------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
$    0- 24.65 $    0-121.20      19.5   %     5.28    5.59    5.90    6.21    6.52    6.83    7.14    7.45
 24.65- 59.75      0-121.20      31.5         6.20    6.57    6.93    7.30    7.66    8.03    8.39    8.76
 59.75-124.65      0-121.20      34.5         6.49    6.87    7.25    7.63    8.02    8.40    8.78    9.16
              121.20-243.70      36.0         6.64    7.03    7.42    7.81    8.20    8.59    8.98    9.38
124.65-271.05 121.20-243.70      41.0         7.20    7.63    8.05    8.47    8.90    9.32    9.75   10.17
                Over 243.70      40.5   2     7.14    7.56    7.98    8.40    8.82    9.24    9.66   10.08
  Over 271.05   Over 243.70      44.0   3     7.59    8.04    8.48    8.93    9.38    9.82   10.27   10.71


1 The table reflects the effect of the limitations on itemized deductions and the deduction for personal exemptions. They were designed to phase out certain benefits of these deductions for higher income taxpayers. These limitations, in effect, raise the current maximum marginal combined Federal and state tax rate to approximately 47.26 percent for taxpayers filing a joint return and entitled to four personal exemptions and to approximately 43.84 percent for taxpayers filing a single return entitled to only one personal exemption. These limitations are subject to certain maximums, which depend on the number of exemptions claimed and the total amount of the taxpayer's itemized deductions. For example, the limitation on itemized deductions will not cause a taxpayer to lose more than 80% of his allowable itemized deductions, with certain exceptions.

2 Combined Federal and state tax rate reverts to 39.2% after the 80% cap on the limitation on itemized deductions has been met.

3 Combined Federal and state tax rate reverts to 42.62% after the 80% cap on the limitation on itemized deductions has been met.

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APPENDIX B
NEW YORK DISCLOSURE

ECONOMIC FACTORS--NEW YORK

The Portfolio of the New York Insured Trust includes obligations issued by New York State (the "State"), by its various public bodies (the "Agencies"), and/or by other entities located within the State, including the City of New York (the "City").

Some of the more significant events and conditions relating to the financial situation in New York are summarized below. This section provides only a brief summary of the complex factors affecting the financial situation in New York and is derived from sources that are generally available to investors and is believed to be accurate. It is based in part on Official Statements and prospectuses issued by, and on other information reported by the State, the City and the Agencies in connection with the issuance of their respective securities.

There can be no assurance that current or future statewide or regional economic difficulties, and the resulting impact on State or local government finances generally, will not adversely affect the market value of New York Municipal Obligations held in the portfolio of the Trust or the ability of particular obligors to make timely payments of debt service on (or relating to) those obligations.

(1) THE STATE: The State has historically been one of the wealthiest states in the nation. For decades, however, the State economy has grown more slowly than that of the nation as a whole, gradually eroding the State's relative economic affluence. Statewide, urban centers have experienced significant changes involving migration of the more affluent to the suburbs and an influx of generally less affluent residents. Regionally, the older Northeast cities have suffered because of the relative success that the South and the West have had in attracting people and business. The City has also had to face greater competition as other major cities have developed financial and business capabilities which make them less dependent on the specialized services traditionally available almost exclusively in the City.

The State has for many years had a very high state and local tax burden relative to other states. The burden of State and local taxation, in combination with the many other causes of regional economic dislocation, has contributed to the decisions of some businesses and individuals to relocate outside, or not locate within, the State.

SLOWDOWN OF REGIONAL ECONOMY. A national recession commenced in mid-1990. The downturn continued throughout the State's 1990-91 fiscal year and was followed by a period of weak economic growth during the 1991 calendar year. For calendar year 1992, the national economy continued to recover, although at a rate below all post-war recoveries. For calendar year 1993, the economy grew faster than in 1992, but still at a very moderate rate, as compared to other recoveries. Moderate economic growth continued in calendar year 1994. The State has projected the rate of economic growth to slow within New York during 1995, as the expansion of the national economy moderates. Economic recovery started considerably later in the State than in the nation as a whole due in part to the significant retrenchment in the banking and financial services industries, downsizing by several major corporations, cutbacks in defense spending, and an oversupply of office buildings. Many uncertainties exist in forecasts of both the national and State economies and there can be no assurance that the State economy will perform at a level sufficient to meet the State's projections of receipts and disbursements.

1995-96 FISCAL YEAR. The Governor issued a proposed Executive Budget for the 1995-96 fiscal year (the "Proposed Budget") on February 1, 1995, which projected a balanced general fund and receipts and disbursements of $32.5 billion and $32.4 billion, respectively. As of May 29, 1995, the State legislature had not yet enacted, nor had the Governor and the legislature reached an agreement on, the budget for the 1995-96 fiscal year which commenced on April 1, 1995. The delay in the enactment of the budget may negatively affect certain proposed actions and reduce projected savings.

The Proposed Budget and the 1995-96 Financial Plan provide for the closing of a projected $4.7 billion budget gap in the 1995-96 fiscal year by cost-containment savings in social welfare programs, savings from State agency restructurings, freezing the level of some categories of local aid and new revenue measures.

The State's proposed budget and the 1995-96 Plan may be impacted negatively by uncertainties relating to the economy and tax collections, although recent signs of improvement in the national economy could lead to short-term increases in State receipts.

1994-1995 FISCAL YEAR. The State Legislature enacted the State's 1994-95 fiscal year budget on June 7, 1994, more than two months after the start of that fiscal year. As of February 1, 1995, the updated 1994-95 State Financial Plan (the "Plan") projected total general fund receipts and disbursements of $33.3 billion and $33.5 billion, respectively, representing reductions in receipts and disbursements of $1 billion and $743 million,

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respectively, from the amount set forth in the 1994-95 budget. The Plan projected for a General Fund balance of approximately $157 million at the close of the 1994-95 fiscal year.

1993-94 FISCAL YEAR. The State ended the 1993-94 fiscal year with an operating surplus of approximately $1.0 billion.

FUTURE FISCAL YEARS. There can be no assurance that the State will not face substantial potential budget gaps in the future resulting from a significant disparity between tax revenues projected from a lower recurring receipts base and the spending required to maintain State programs at current levels. To address any potential budgetary imbalance, the State may need to take significant actions to align recurring receipts and disbursements.

INDEBTEDNESS. As of March 31, 1994, the total amount of long-term State general obligation debt authorized but unissued stood at $2.0 billion. As of the same date, the State had approximately $5.4 billion in general obligation bonds including $224 million of Bond Anticipation Notes outstanding.

The State originally projected that its borrowings for capital purposes during the State's 1994-95 fiscal year would consist of $374 million in general obligation bonds and bond anticipation notes and $140 million in general obligation commercial paper. The Legislature has authorized the issuance of up to $69 million in certificates of participation in pools of leases for equipment and real property to be utilized by State agencies. Through March 15, 1995, the State had issued in excess of $590 million of its general obligation bonds (including $430 million of refunding bonds). The projections of the State regarding its borrowings for any fiscal year are subject to change if actual receipts fall short of State projections or if other circumstances require.

In June 1990, legislation was enacted creating the "New York Local Government Assistance Corporation" ("LGAC"), a public benefit corporation empowered to issue long-term obligations to fund certain payments to local governments traditionally funded through the State's annual seasonal borrowing. As of March 31, 1994, LGAC has issued its bonds to provide net proceeds of $4.5 billion. The LGAC was authorized to provide net proceeds of $315 million, during the State's 1994-95 fiscal year. The LGAC issued $347 million of bonds on March 1, 1995 providing the authorized net proceeds.

Financing of capital programs by other public authorities of the State is also obtained from lease-purchase and contractual-obligation financing arrangements, the debt service for which is paid from State appropriations. As of March 31, 1994, there were $16.6 billion of such other financing arrangements outstanding and additional financings of this nature by public authorities are projected to total $2.4 billion during the 1994-95 fiscal year. In addition, certain agencies had issued and outstanding approximately $7.3 billion of "moral obligation financings" as of March 31, 1994, which are to be repaid from project revenues. While there has never been a default on moral obligation debt of the State, the State would be required to make up any shortfall in debt service.

RATINGS. The $850 million in TRANS issued by the State in April 1993 were rated SP-1-Plus by S&P and MIG-1 by Moody's which represent the highest ratings given by such agencies and the first time the State's TRANS have received these ratings since its May 1989 TRANS issuance. Both agencies cited the State's improved fiscal position as a significant factor in the upgrading of the April 1993 TRANS.

Moody's rating of the State's general obligation bonds stood at A on February 28, 1994, and S&P's rating stood at A- with a positive outlook on February 28, 1994, an improvement from S&P's stable outlook from April 1993 through February 1994 and negative outlook prior to April 1993. Previously, Moody's lowered its rating to A on June 6, 1990, its rating having been A1 since May 27, 1986. S&P lowered its rating from A to A- on January 13, 1992. S&P's previous ratings were A from March 1990 to January 1992, AA- from August 1987 to March 1990 and A+ from November 1982 to August 1987.

Moody's maintained its A rating and S&P continued its A- rating in connection with the State's issuance of $537 million of its general obligation bonds in March 1995.

(2) THE CITY AND THE MUNICIPAL ASSISTANCE CORPORATION ("MAC"): The City accounts for approximately 40% of the State's population and personal income, and the City's financial health affects the State in numerous ways.

In response to the City's fiscal crisis in 1975, the State took a number of steps to assist the City in returning to fiscal stability. Among other actions, the State Legislature (i) created MAC to assist with long-term financing for the City's short-term debt and other cash requirements and (ii) created the State Financial Control Board (the "Control Board") to review and approve the City's budgets and City four-year financial plans (the financial plans also apply to certain City-related public agencies (the "Covered Organizations")).

In recent years, the rate of economic growth in the City slowed substantially as the City's economy entered a recession. While by some measures the City's economy may have begun to recover, a number of factors, including poor performance by the City's financial services companies, may prevent a significant improvement in the City's economy and may in fact negatively impact upon the City's finances by reducing tax receipts. The City Comptroller

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has issued reports concluding that the recession of the City's economy may be ending, but there is little prospect of any significant improvement in the near term.

FISCAL YEAR 1996 AND THE 1995-1998 FINANCIAL PLAN. On February 14, 1995, the Mayor released his preliminary $30.5 billion budget for fiscal year 1996, which included $2.7 billion of deficit reduction measures. The Mayor is seeking a $1.2 billion reduction in mandated welfare and Medicaid expenditures from the State, a $569 million reduction in expenditures by city agencies and the Board of Education budget, $600 million in personnel related savings partly through the elimination of 15,000 jobs within 18 months, and other measures.

The 1995-1998 Financial Plan (the "Plan"), which was submitted to the Control Board on February 23, 1995, projected budget gaps of $3.2 billion and $3.8 billion for fiscal years 1997 and 1998, respectively. The City Comptroller warned on March 7, 1995 that the budget gap for fiscal year 1996 could increase by $500 million to as much as $3.2 billion. The Control Board reported on March 17, 1995 that the proposed budget for fiscal year 1996 relies heavily on risky assumptions such as $600 million in savings to be negotiated with City unions and $1.4 billion in savings dependent on State legislative approval.

The City successfully negotiated concessions with a number of unions in order to ensure that the fiscal year 1995 budget remained in balance. The Mayor has indicated that to avoid additional lay-offs, higher than the number referred to above, reductions will be necessary in the benefit plans of City employees to close the budget gaps for fiscal years 1996 and thereafter. Union leadership has publicly opposed such "givebacks". With respect to fiscal year 1995 the City was also successful in obtaining additional funds and relief from certain mandated expenditures from the State for various programs, including Medicaid. However, the amount of gap closing measures requiring State action set forth in the Plan is well in excess of proposed assistance to the City outlined in the Governor's Proposed Budget.

The Mayor has directed City agencies to identify an additional $300 million in cuts for fiscal year 1996 because of anticipated shortfalls of as much as $500 million in State aid and budgetary actions. An extended delay by the State in adopting its 1995-96 fiscal year budget would negatively impact upon the City's financial condition and ability to close budget gaps for fiscal years 1996 and thereafter.

Given the foregoing factors, there can be no assurance that the City will continue to maintain a balanced budget, or that it can maintain a balanced budget without additional tax or other revenue increases or reductions in City services, which could adversely affect the City's economic base.

Pursuant to State law, the City prepares a four-year annual financial plan, which is reviewed and revised on a quarterly basis and which includes the City's capital, revenue and expense projections. The City is required to submit its financial plans to review bodies, including the Control Board. If the City were to experience certain adverse financial circumstances, including the occurrence or the substantial likelihood and imminence of the occurrence of an annual operating deficit of more than $100 million or the loss of access to the public credit markets to satisfy the City's capital and seasonal financial requirements, the Control Board would be required by State law to exercise certain powers, including prior approval of City financial plans, proposed borrowings and certain contracts.

The City depends on the State for State aid both to enable the City to balance its budget and to meet its cash requirements. If the State experiences revenue shortfalls or spending increases beyond its projections during its 1995-96 fiscal year or subsequent years, such developments could result in reductions in projected State aid to the City. In addition, there can be no assurance that State budgets in the 1996-97 or future fiscal years will be adopted by the April 1 statutory deadline and that there will not be adverse effects on the City's cash flow and additional City expenditures as a result of such delays.

The City projections set forth in the Plan are based on various assumptions and contingencies which are uncertain and which may not materialize. Changes in major assumptions could significantly affect the City's ability to balance its budget as required by State law and to meet its annual cash flow and financing requirements. Such assumptions and contingencies include the timing of any regional and local economic recovery, the absence of wage increases in excess of the increases assumed in its financial plan, employment growth, provision of State and Federal aid and mandate relief, State legislative approval of future State budgets, levels of education expenditures as may be required by State law, adoption of future City budgets by the New York City Council, and approval by the Governor or the State Legislature and the cooperation of MAC with respect to various other actions proposed in the Plan.

The City's ability to maintain a balanced operating budget is dependant on whether it can implement necessary service and personnel reduction programs successfully. As discussed above, the City must identify additional expenditure reductions and revenue sources to achieve balanced operating budgets for fiscal years 1996

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and thereafter. Any such proposed expenditure reductions will be difficult to implement because of their size and the substantial expenditure reductions already imposed on City operations in the past two years.

Attaining a balanced budget is also dependent upon the City's ability to market its securities successfully in the public credit markets. The City's financing program for fiscal years 1995 through 1998 contemplates capital spending of $16.4 billion, which will be financed through issuance of $10.7 billion of general obligation bonds and the balance through Water Authority Revenue Bonds and Covered Organization obligations, and will be utilized primarily to reconstruct and rehabilitate the City's infrastructure and physical assets and to make capital investments. A significant portion of such bond financing is used to reimburse the City's general fund for capital expenditures already incurred. In addition, the City issues revenue and tax anticipation notes to finance its seasonal working capital requirements. The terms and success of projected public sales of City general obligation bonds and notes will be subject to prevailing market conditions at the time of the sale, and no assurance can be given that the credit markets will absorb the projected amounts of public bond and note sales. In addition, future developments concerning the City and public discussion of such developments, the City's future financial needs and other issues may affect the market for outstanding City general obligation bonds and notes. If the City were unable to sell its general obligation bonds and notes, it would be prevented from meeting its planned operating and capital expenditures.

FISCAL YEAR 1995. New York City adopted its fiscal year 1995 budget on June 21, 1994, which provided for spending of $31.6 billion and closed a budget gap of $2.3 billion. However, following adoption of the fiscal year 1995 budget, additional unexpected budget gaps totaling approximately $2.0 billion were identified. The widening of the budget gap for fiscal year 1995 resulted from shortfalls in tax revenues and State and federal aid. The Mayor and the City Council were unable to reach agreement on additional cuts proposed by the Mayor in October 1994. The City Council passed its own budget cut proposal in November 1994. The Mayor vetoed the City Council version, the City Council overrode his veto and the Mayor implemented his original plan. A state court held in December 1994 that neither budget cut proposal could be implemented. The Mayor then elected not to spend certain funds in order to keep the budget in balance.

FISCAL YEARS 1990 THROUGH 1994. The City achieved balanced operating results as reported in accordance with GAAP for its fiscal years 1990 through 1994. The City was required to close substantial budget gaps in these fiscal years to maintain balanced operating results.

The City is a defendant in a significant number of lawsuits. Such litigation includes, but is not limited to, actions commenced and claims asserted against the City arising out of alleged constitutional violations, torts, breaches of contracts, and other violations of law and condemnation proceedings. While the ultimate outcome and fiscal impact, if any, on the proceedings and claims are not currently predictable, adverse determinations in certain of them might have a material adverse effect upon the City's ability to carry out its financial plan. As of June 30, 1994, the City estimated its potential future liability to be $2.6 billion.

On January 30, 1995, Robert L. Schulz and other defendants commenced a federal district court action seeking among other matters to cancel the issuance on January 31, 1995 of $659 million of City bonds. While the federal courts have rejected requests for temporary restraining orders and expedited appeals, the case is still pending. The City has indicated that it believes the action to be without merit as it relates to the City, but there can be no assurance as to the outcome of the litigation and an adverse ruling or the granting of a permanent injunction would have a negative impact on the City's financial condition and its ability to fund its operations.

RATINGS. As of the date of this prospectus, Moody's rating of the City's general obligation bonds stood at Baa1 and S&P's rating stood at BBB+. On February 11, 1991, Moody's had lowered its rating from A. S&P's lowered its rating from A- on July 10, 1995 after placing the City on "negative credit watch" in January 1995.

On March 13, 1995, Moody's confirmed its Baa1 rating in connection with a scheduled March 1995 sale of $795 million of the City's general obligation bonds.

In dropping the City's rating in July 1995, S&P's cited the "sluggish" economy and the poor outlook for job growth, as well as the continued use of "one-time measures" to close budget gaps. The lowered rating could increase the City's borrowing costs by forcing it to offer higher interest rates on its bonds thereby adding further pressures to the City's budget problems. In addition, the lowered rating may prevent certain institutional investors from purchasing the City's bonds reducing demand for future offerings, which could also force the City to increase interest rates on its bonds.

On October 12, 1993, Moody's increased its rating of the City's issuance of $650 million of Tax Anticipation Notes ("TANs") to MIG-1 from MIG-2. Prior to that date, on May 9, 1990, Moody's revised downward its rating on outstanding City revenue anticipation notes from MIG-1 to MIG-2 and rated the $900 million Notes then being

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sold MIG-2. S&P's rating of the October 1993 TANS issue increased to SP-1 from SP-2. Prior to that date, on April 29, 1991, S&P revised downward its rating on City revenue anticipation notes from SP-1 to SP-2.

As of December 31, 1994, the City and MAC had, respectively, $22.5 billion and $4.1 billion of outstanding net long-term indebtedness.

(3) THE STATE AGENCIES: Certain Agencies of the State have faced substantial financial difficulties which could adversely affect the ability of such Agencies to make payments of interest on, and principal amounts of, their respective bonds. The difficulties have in certain instances caused the State (under so-called "moral obligation" provisions which are non-binding statutory provisions for State appropriations to maintain various debt service reserve funds) to appropriate funds on behalf of the Agencies. Moreover, it is expected that the problems faced by these Agencies will continue and will require increasing amounts of State assistance in future years. Failure of the State to appropriate necessary amounts or to take other action to permit those Agencies having financial difficulties to meet their obligations could result in a default by one or more of the Agencies. Such default, if it were to occur, would be likely to have a significant adverse effect on investor confidence in, and therefore the market price of, obligations of the defaulting Agencies. In addition, any default in payment on any general obligation of any Agency whose bonds contain a moral obligation provision could constitute a failure of certain conditions that must be satisfied in connection with Federal guarantees of City and MAC obligations and could thus jeopardize the City's long-term financing plans.

As of September 30, 1993, the State reported that there were eighteen Agencies that each had outstanding debt of $100 million or more and an aggregate of $63.5 billion of outstanding debt, some of which was state-supported, state-related debt.

(4) STATE LITIGATION: The State is a defendant in numerous legal proceedings pertaining to matters incidental to the performance of routine governmental operations. Such litigation includes, but is not limited to, claims asserted against the State arising from alleged torts, alleged breaches of contracts, condemnation proceedings and other alleged violations of State and Federal laws. Included in the State's outstanding litigation are a number of cases challenging the constitutionality or the adequacy and effectiveness of a variety of significant social welfare programs primarily involving the State's mental hygiene programs. Adverse judgments in these matters generally could result in injunctive relief coupled with prospective changes in patient care which could require substantial increased financing of the litigated programs in the future.

The State is also engaged in a variety of claims wherein significant monetary damages are sought. Actions commenced by several Indian nations claim that significant amounts of land were unconstitutionally taken from the Indians in violation of various treaties and agreements during the eighteenth and nineteenth centuries. The claimants seek recovery of approximately six million acres of land as well as compensatory and punitive damages.

The State has entered into a settlement agreement with Delaware, Massachusetts and all other parties with respect to STATE OF DELAWARE V. STATE OF NEW YORK, an action by Delaware and other states to recover unclaimed property from New York-based brokers, which has escheated to the State pursuant to its ABANDONED PROPERTY LAW. Annual payments under this settlement will be made through the State's 2002-03 fiscal year in amounts not exceeding $48.4 million in any fiscal year subsequent to the State's 1994-95 fiscal year.

In SCHULZ V. STATE OF NEW YORK, commenced May 24, 1993 ("SCHULZ 1993"), petitioners have challenged the constitutionality of mass transportation bonding programs of the New York State Thruway Authority and the Metropolitan Transportation Authority. On May 24, 1993, the Supreme Court, Albany County, temporarily enjoined the State from implementing those bonding programs.

Petitioners in SCHULZ asserted that issuance of bonds by the two Authorities is subject to approval by statewide referendum. By decision dated October 21, 1993, the Appellate Division, Third Department, affirmed the order of the Supreme Court, Albany County, granting the State's motion for summary judgment, dismissing the complaint and vacating the temporary restraining order. On June 30, 1994, the Court of Appeals, the State's highest court, upheld the decisions of the Supreme Court and Appellate Division in SCHULZ, Plaintiffs' motion for reargument was denied by the Court of Appeals on September 1, 1994 and their writ of certiorari to the U.S. Supreme Court was denied on January 23, 1995.

Adverse developments in the foregoing proceedings or new proceedings could adversely affect the financial condition of the State in the future.

(5) OTHER MUNICIPALITIES: Certain localities in addition to New York City could have financial problems leading to requests for additional State assistance. The potential impact on the State of such actions by localities is not included in projections of State receipts and expenditures in the State's 1994-95 fiscal years.

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Fiscal difficulties experienced by the City of Yonkers ("Yonkers") resulted in the creation of the Financial Control Board for the City of Yonkers (the "Yonkers Board") by the State in 1984. The Yonkers Board is charged with oversight of the fiscal affairs of Yonkers. Future actions taken by the Governor or the State Legislature to assist Yonkers could result in allocation of State resources in amounts that cannot yet be determined.

Municipalities and school districts have engaged in substantial short-term and long-term borrowings. In 1992, the total indebtedness of all localities in the State was approximately $35.2 billion, of which $19.5 billion was debt of New York City (excluding $5.9 billion in MAC debt). State law requires the Comptroller to review and make recommendations concerning the budgets of those local government units other than New York City authorized by State law to issue debt to finance deficits during the period that such deficit financing is outstanding. Seventeen localities had outstanding indebtedness for state financing at the close of their fiscal year ending in 1992.

Certain proposed Federal expenditure reductions could reduce, or in some cases eliminate, Federal funding of some local programs and accordingly might impose substantial increased expenditure requirements on affected localities. If the State, New York City or any of the Agencies were to suffer serious financial difficulties jeopardizing their respective access to the public credit markets, the marketability of notes and bonds issued by localities within the State, including notes or bonds in the New York Insured Trust, could be adversely affected. Localities also face anticipated and potential problems resulting from certain pending litigation, judicial decisions, and long-range economic trends. The longer-range potential problems of declining urban population, increasing expenditures, and other economic trends could adversely affect localities and require increasing State assistance in the future.

(6) OTHER ISSUERS OF NEW YORK MUNICIPAL OBLIGATIONS. There are a number of other agencies, instrumentalities and political subdivisions of the State that issue Municipal Obligations, some of which may be conduit revenue obligations payable from payments from private borrowers. These entities are subject to various economic risks and uncertainties, and the credit quality of the securities issued by them may vary considerably from the credit quality of obligations backed by the full faith and credit of the State.

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NEW YORK TAXABLE ESTIMATED CURRENT RETURN TABLE

The following tables show the approximate taxable estimated current returns for individuals that are equivalent to tax-exempt estimated current returns under combined Federal and state taxes, using published 1997 marginal Federal tax rates and marginal state tax rates currently available and scheduled to be in effect. The tables incorporate increased tax rates for higher-income taxpayers that were included in the Revenue Reconciliation Act of 1993. The tables assume that federal taxable income is equal to state and city income subject to tax and that federal adjusted gross income is equal to state and city adjusted gross income, and for cases in which more than one state rate falls within a Federal bracket, the state rate corresponding to the highest income within that Federal bracket is used. The combined state and Federal tax brackets shown reflect the fact that state tax payments are currently deductible for Federal tax purposes. The tables do not reflect any local taxes, other than New York City in Chart II, or any taxes other than personal income taxes. The tables illustrate what you would have to earn on taxable investments to equal the tax-exempt estimated current return for your income tax bracket. A taxpayer's marginal tax rate is affected by both his taxable income and his adjusted gross income. Locate your adjusted gross and your taxable income (which is your adjusted gross income reduced by any deductions and exemptions), then locate your tax bracket based on joint or single tax filing. Read across to the equivalent taxable estimated current return you would need to match the tax-free income.

I. COMBINED FEDERAL AND NEW YORK STATE INCOME TAXES

COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS

                 FEDERAL
   FEDERAL      ADJUSTED      COMBINED
   TAXABLE        GROSS       STATE AND                    TAX-FREE ESTIMATED CURRENT RETURN
   INCOME        INCOME        FEDERAL       --------------------------------------------------------------
  (1,000'S)     (1,000'S)     TAX RATE1      4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%
------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
$     0- 41.2 $    0-100.00     21.0    %     5.70    6.01    6.33    6.65    6.96    7.28    7.59    7.91
              100.00-121.20     22.0          5.77    6.09    6.41    6.73    7.05    7.37    7.69    8.01
   41.2- 99.6      0-100.00     33.0          6.72    7.09    7.46    7.84    8.21    8.58    8.96    9.33
              100.00-121.20     34.0          6.82    7.20    7.58    7.95    8.33    8.71    9.09    9.47
              121.20-150.00     35.0          6.92    7.31    7.69    8.08    8.46    8.85    9.23    9.62
               150.0-181.80     34.0          6.82    7.20    7.58    7.95    8.33    8.71    9.09    9.47
  99.6-151.75      0-100.00     35.5          6.98    7.36    7.75    8.14    8.53    8.91    9.30    9.69
               100.0-121.20     37.0          7.14    7.54    7.94    8.33    8.73    9.13    9.52    9.92
              121.20-150.00     38.0          7.26    7.66    8.06    8.47    8.87    9.27    9.68   10.08
              150.00-181.80     36.5          7.09    7.48    7.87    8.27    8.66    9.06    9.45    9.84
              181.80-304.30     39.0          7.38    7.79    8.20    8.61    9.02    9.43    9.84   10.25
151.75-271.05 121.20-150.00     42.5          7.83    8.26    8.70    9.13    9.57   10.00   10.43   10.87
              150.00-181.80     41.5          7.69    8.12    8.55    8.97    9.40    9.83   10.26   10.68
              181.80-304.30     44.5          8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
                Over 304.30     41.5    2     7.69    8.12    8.55    8.97    9.40    9.83   10.26   10.68
  Over 271.05 181.80-304.30     48.0          8.65    9.13    9.62   10.10   10.58   11.06   11.54   12.02
                Over 304.30     45.0    3     8.18    8.64    9.09    9.55   10.00   10.45   10.91   11.36

COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION

                 FEDERAL
   FEDERAL      ADJUSTED      COMBINED
   TAXABLE        GROSS       STATE AND                    TAX-FREE ESTIMATED CURRENT RETURN
   INCOME        INCOME        FEDERAL       --------------------------------------------------------------
  (1,000'S)     (1,000'S)     TAX RATE1      4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%
------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
$    0- 24.65 $    0-100.00     21.0    %     5.70    6.01    6.33    6.65    6.96    7.28    7.59    7.91
              100.00-121.20     21.5          5.73    6.05    6.37    6.69    7.01    7.32    7.64    7.96
 24.65- 59.75      0-100.00     33.0          6.72    7.09    7.46    7.84    8.21    8.58    8.96    9.33
              100.00-121.20     33.5          6.77    7.14    7.52    7.89    8.27    8.65    9.02    9.40
 59.75-124.65      0-100.00     35.5          6.98    7.36    7.75    8.14    8.53    8.91    9.30    9.69
              100.00-121.20     36.5          7.09    7.48    7.87    8.27    8.66    9.06    9.45    9.84
              121.20-150.00     38.0          7.26    7.66    8.06    8.47    8.87    9.27    9.68   10.08
              150.00-243.70     37.5          7.20    7.60    8.00    8.40    8.80    9.20    9.60   10.00
124.65-271.05 121.20-150.00     42.5          7.83    8.26    8.70    9.13    9.57   10.00   10.43   10.87
              150.00-243.70     42.0          7.76    8.19    8.62    9.05    9.48    9.91   10.34   10.78
                Over 243.70     41.5    2     7.69    8.12    8.55    8.97    9.40    9.83   10.26   10.68
  Over 271.05   Over 243.70     45.0    3     8.18    8.64    9.09    9.55   10.00   10.45   10.91   11.36

B-7

II. COMBINED FEDERAL, NEW YORK STATE AND NEW YORK CITY INCOME TAXES

COMBINED MARGINAL TAX RATES FOR JOINT TAXPAYERS WITH FOUR PERSONAL EXEMPTIONS

                 FEDERAL      COMBINED
   FEDERAL      ADJUSTED       STATE,
   TAXABLE        GROSS         LOCAL                      TAX-FREE ESTIMATED CURRENT RETURN
   INCOME        INCOME      AND FEDERAL     --------------------------------------------------------------
  (1,000'S)     (1,000'S)     TAX RATE1      4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%
------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
$     0- 41.2 $    0-100.00     24.5    %     5.96    6.29    6.62    6.95    7.28    7.62    7.95    8.28
              100.00-121.20     26.0          6.08    6.42    6.76    7.09    7.43    7.77    8.11    8.45
   41.2- 99.6      0-100.00     36.0          7.03    7.42    7.81    8.20    8.59    8.98    9.38    9.77
              100.00-121.20     37.5          7.20    7.60    8.00    8.40    8.80    9.20    9.60   10.00
              121.20-150.00     38.5          7.32    7.72    8.13    8.54    8.94    9.35    9.76   10.16
               150.0-181.80     37.0          7.14    7.54    7.94    8.33    8.73    9.13    9.52    9.92
  99.6-151.75      0-100.00     39.0          7.38    7.79    8.20    8.61    9.02    9.43    9.84   10.25
               100.0-121.20     40.0          7.50    7.92    8.33    8.75    9.17    9.58   10.00   10.42
              121.20-150.00     41.0          7.63    8.05    8.47    8.90    9.32    9.75   10.17   10.59
              150.00-181.80     40.0          7.50    7.92    8.33    8.75    9.17    9.58   10.00   10.42
              181.80-304.30     42.0          7.76    8.19    8.62    9.05    9.48    9.91   10.34   10.78
151.75-271.05 121.20-150.00     45.5          8.26    8.72    9.17    9.63   10.09   10.55   11.01   11.47
              150.00-181.80     44.5          8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
              181.80-304.30     47.0          8.49    8.96    9.43    9.91   10.38   10.85   11.32   11.79
                Over 304.30     44.5    2     8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
  Over 271.05 181.80-304.30     50.5          9.09    9.60   10.10   10.61   11.11   11.62   12.12   12.63
                Over 304.30     47.5    3     8.57    9.05    9.52   10.00   10.48   10.95   11.43   11.90

COMBINED MARGINAL TAX RATES FOR SINGLE TAXPAYERS WITH ONE PERSONAL EXEMPTION

                 FEDERAL      COMBINED
   FEDERAL      ADJUSTED       STATE,
   TAXABLE        GROSS         LOCAL                      TAX-FREE ESTIMATED CURRENT RETURN
   INCOME        INCOME      AND FEDERAL     --------------------------------------------------------------
  (1,000'S)     (1,000'S)     TAX RATE1      4.50%   4.75%   5.00%   5.25%   5.50%   5.75%   6.00%   6.25%
------------- -------------  -----------     ------  ------  ------  ------  ------  ------  ------  ------
$    0- 24.65 $    0-100.00     24.5    %     5.96    6.29    6.62    6.95    7.28    7.62    7.95    8.28
              100.00-121.20     25.0          6.00    6.33    6.67    7.00    7.33    7.67    8.00    8.33
 24.65- 59.75      0-100.00     36.0          7.03    7.42    7.81    8.20    8.59    8.98    9.38    9.77
              100.00-121.20     36.5          7.09    7.48    7.87    8.27    8.66    9.06    9.45    9.84
 59.75-124.65      0-100.00     39.0          7.38    7.79    8.20    8.61    9.02    9.43    9.84   10.25
              100.00-121.20     39.5          7.44    7.85    8.26    8.68    9.09    9.50    9.92   10.33
              121.20-150.00     41.0          7.63    8.05    8.47    8.90    9.32    9.75   10.17   10.59
              150.00-243.70     40.5          7.56    7.98    8.40    8.82    9.24    9.66   10.08   10.50
124.65-271.05 121.20-150.00     45.5          8.26    8.72    9.17    9.63   10.09   10.55   11.01   11.47
              150.00-243.70     45.0          8.18    8.64    9.09    9.55   10.00   10.45   10.91   11.36
                Over 243.70     44.5    2     8.11    8.56    9.01    9.46    9.91   10.36   10.81   11.26
  Over 271.05   Over 243.70     47.5    3     8.57    9.05    9.52   10.00   10.48   10.95   11.43   11.90


1 The table reflects the effect of the federal limitations on itemized deductions (and the corresponding state limitations) and the deductions for personal exemptions. They were designed to phase out certain benefits of these deductions for higher income taxpayers. These limitations, in effect, raise the marginal combined Federal and state tax rate to approximately 48.09 percent for taxpayers filing a joint return and entitled to four personal exemptions and to approximately 44.97 percent for taxpayers filing a single return entitled to only one personal exemption and, in effect raise the marginal combined State, New York City and Federal tax rate to approximately 50.65 percent for taxpayers filing a joint return and entitled to four personal exemptions and to approximately 47.69 percent, for taxpayers filing a single return entitled to only one personal exemption. These limitations are subject to certain maximums, which depend on the number of exemptions claimed and the total amount of the taxpayer's itemized deductions. For example, the limitation on itemized deductions will not cause a taxpayer to lose more than 80% of his allowable Federal or state itemized deductions, with certain exceptions. The table also reflects the New York State supplemental income tax based upon a taxpayer's New York State taxable income and New York State adjusted gross income. This supplemental tax results in an increased marginal state income tax rate to the extent a taxpayer's New York State adjusted gross income ranges between $100,000 and $150,000. Although the table does reflect the effect of the state limitation on itemized deductions that corresponds to the federal limitation, it does not reflect additional limitations under which a New York taxpayer could lose up to an additional 50 percent of his otherwise allowable itemized deductions, because the affect of this limitation varies according to the particular amount of his itemized deductions. The application of this limit may result in a higher tax rate than indicated in the table for joint taxpayers with a New York adjusted gross income of $200,000 to $250,000 or $475,000 to $525,000 or single taxpayers with a New York adjusted gross income of $100,000 to $150,000 or $475,000 to $525,000. The table assumes that a taxpayer's New York adjusted gross income equals his Federal adjusted gross income. The table does not reflect the treatment of various state and city tax credits that could affect the tax rate of particular New York taxpayers.

2 Combined Federal and state tax rate reverts to 40.38% after the 80% caps on the limitation on itemized deductions has been met. Combined state, New York City and Federal tax rate reverts to 43.24% after the 80% cap on the limitation on itemized deductions has been met.

3 Combined Federal and state tax rate reverts to 43.74% after the 80% caps on the limitation on itemized deductions has been met. Combined state, New York City and Federal tax rate reverts to 46.43% after the 80% cap on the limitation on itemized deductions has been met.

B-8

STATEMENT OF DIFFERENCES BETWEEN ELECTRONIC FILING AND PRINTED DOCUMENT.

Pursuant to Rule 499(c) (7) under the Securities Act of 1933 and Rule 20-11 under the Investment Company Act of 1940, Registrant hereby identifies those differences in the foregoing document between the electronic format in which it is filed and the printed form in which it will be circulated:

(1) The printed and distributed prospectus may be paged differently because the printed document may contain a different amount of information on each page from that contained in the electronic transmission.

(2) In the printed document, footnote symbols may include a "dagger" or multiple "dagger". The "dagger" symbol is represented as # in the electronic document.

(3) The printed and distributed prospectus will not contain the preliminary prospectus legend included at the beginning of the first prospectus page.


CONTENTS OF REGISTRATION STATEMENT

A. BONDING ARRANGEMENTS OF DEPOSITOR:

The Depositor has obtained the following Stockbrokers Blanket Bonds for its officers, directors and employees:

INSURER/POLICY NO.                                                       AMOUNT
United Pacific Insurance Co.                                          $ 10,000,000
Reliance Insurance Company
B 74 92 20
Aetna Casualty and Surety                                             $ 10,000,000
08 F10618BCA
St. Paul Insurance Co.                                                $  6,000,000
400 HC 1051

B. THIS AMENDMENT OF REGISTRATION STATEMENT COMPRISES THE FOLLOWING PAPERS AND DOCUMENTS:

The facing sheet

The cross-reference sheet

The Prospectus

The signatures

Consents of Independent Public
Accountants and Counsel as indicated

Exhibits as listed on page S-5

C. EXPLANATORY NOTE:

This Amendment No. 1 to the Registration Statement contains multiple separate prospectuses. Each prospectus will relate to an individual unit investment trust and will consist of a Part A, a Part B and an Information Supplement. Each prospectus will be identical will the exception of the respective Part A which will contain the financial information specific to such underlying unit investment trust.

D. UNDERTAKINGS:

1. With the exception of the information included in the state specific appendices to the Information Supplement, which will vary depending upon the make-up of a Fund or updated to reflect current events, any amendment to a Fund's Information Supplement will be subject to the review of the staff of the Securities and Exchange Commission prior to distribution; and

2. The Information Supplement to the Trust will not include third party financial information.

S-1

SIGNATURES

The Registrant, Nuveen Tax-Free Unit Trust, Series 943 hereby identifies Series 401, 507, 512, 515, 517, 519, 723, 814 and 823 of the Nuveen Tax-Exempt Unit Trust (the former name of the Nuveen Tax-Free Unit Trust) for purposes of the representations required by Rule 487 and represents the following:

(1) that the portfolio securities deposited in the series as to the securities of which this Registration Statement is being filed do not differ materially in type or quality from those deposited in such previous series;

(2) that, except to the extent necessary to identify the specific portfolio securities deposited in, and to provide essential financial information for, the series with respect to the securities of which this Registration Statement is being filed, this Registration Statement does not contain disclosures that differ in any material respect from those contained in the registration statements for such previous series as to which the effective date was determined by the Commission or the staff; and

(3) that it has complied with Rule 460 under the Securities Act of 1933.

Pursuant to the requirements of the Securities Act of 1933, the Registrant, Nuveen Tax-Free Unit Trust, Series 943 has duly caused this Amendment of Registration Statement to be signed on its behalf by the undersigned thereunto duly authorized in the City of Chicago and State of Illinois on May 30, 1997.

NUVEEN TAX-FREE UNIT TRUST, SERIES 943
(Registrant)

By JOHN NUVEEN & CO. INCORPORATED
(Depositor)

By: Anna R. Kucinskis
Vice President

Attest: Morrison C. Warren
Assistant Secretary

S-2

Pursuant to the requirements of the Securities Act of 1933, this Amendment of Registration Statement has been signed below by the following persons in the capacities and on the dates indicated:

          SIGNATURE                        TITLE*                 DATE
Timothy T. Schwertfeger        Chairman, Board of Directors         )
                               Chief Executive Officer and          )
                               Director                             )
                                                                    )
Anthony T. Dean                President, Chief Operating           )
                               Officer and Director                 )           Larry Woods Martin
                                                                    )           Attorney-In-Fact**
                                                                    )
John P. Amboian                Chief Financial Officer and          )              May 30, 1997
                               Executive Vice President             )
                                                                    )
                                                                    )
O. Walter Renfftlen            Vice President and Controller        )
                               (Principal Accounting Officer)       )
                                                                    )
                                                                    )


* The titles of the persons named herein represent their capacity in and relationship to John Nuveen & Co. Incorporated, the Depositor.

** The powers of attorney were filed on Form SE for Messrs. Renfftlen, Dean and Schwertfeger with the Amendment to the Registration Statement on Form S-6 of Nuveen Tax-Free Unit Trust, Series 671 (File No. 33-49175). The Power of Attorney for Messr. Amboian was filed with the Amendment to the Registration statement on Form S-6 of Nuveen Tax-Free Unit Trust, Series 823 (File No. 33-62325).

S-3

943

CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

The consent of Arthur Andersen LLP to the use of its name in the Prospectus included in the Registration Statement is filed by this amendment as Exhibit 4.4 to the Registratin Statement.

CONSENT OF CHAPMAN AND CUTLER

The consent of Chapman and Cutler to the use of its name in the Prospectus included in the Registration Statement is contained in its opinions filed by this amendment as Exhibits 3.1 and 3.2 to the Registration Statement.

CONSENT OF STATE COUNSEL

The consents of special counsel to the Fund for state tax matters to the use of their names in the Prospectus included in the Registration Statement are contained in their opinions filed by this amendment as Exhibit 3.3 to the Registration Statement.

CONSENT OF STANDARD & POOR'S,
A DIVISION OF THE MCGRAW-HILL COMPANIES

The consent of Standard & Poor's, a Division of The McGraw-Hill Companies, to the use of its name in the Prospectus included in the Registration Statement is filed by this amendment as Exhibit 4.1 to the Registration Statement.

CONSENT OF KENNY S&P EVALUATION SERVICES

The consent of Kenny S&P Evaluation Services to the use of its name in the Prospectus included in the Registration Statement is filed by this amendment as Exhibit 4.2 to the Registration Statement.

CONSENT OF CARTER, LEDYARD & MILBURN

The consent of Carter, Ledyard & Milburn to the use of its name in the Prospectus included in the Registration Statement is filed by this amendment as Exhibit 4.3 to the Registration Statement.

S-4

LIST OF EXHIBITS

1.1(a)      Copy  of Standard Terms and Conditions of Trust between John Nuveen & Co. Incorporated,
            Depositor, and The Chase Manhattan  Bank, Trustee (as Exibit  1.1 (a) to the  Sponsor's
            Registration  Statement  on Form  S-6  relating to  Series 823  of  the Fund  (file No.
            33-62325) and incorporated herein by reference).
1.1(b)      Trust Indenture and Agreement.
2.1         Copy of  Certificate  of  Ownership (Included  in  Exhibit  1.1(a) on  pages  2  to  8,
            inclusive, and incorporated herein by reference).
3.1         Opinion of counsel as to legality of securities being registered.
3.2         Opinion of counsel as to Federal income tax status of securities being registered.
3.3         Opinions  of special state counsel to  the Fund for state tax  matters as to income tax
            status to residents of the respective states of the units of the respective trusts  and
            consents to the use of their names in the Prospectus.
4.1         Consent of Standard & Poor's, a Division of The McGraw-Hill Companies.
4.2         Consent of Kenny S&P Evaluation Services.
4.3         Consent of Carter, Ledyard & Milburn.
4.4         Consent of Arthur Andersen LLP
6.1         List of Directors and Officers of Depositor and other related information (incorporated
            by  reference to Form S-6 [File  No. 33-62325] filed on September  7, 1995 on behalf of
            Nuveen Tax-Free Unit Trust, Series 823).

S-5

EXHIBIT 1.1(B)
NUVEEN TAX-FREE UNIT TRUST SERIES 943
TRUST INDENTURE AND AGREEMENT
DATED MAY 30, 1997

This Trust Indenture and Agreement by and between John Nuveen & Co. Incorporated, as Depositor and The Chase Manhattan Bank, as Trustee, sets forth certain provisions in full and incorporates other provisions by reference to the document entitled 'Standard Terms and Conditions of Trust for Nuveen Tax-Free Unit Trust Series 823 and subsequent Series, effective September 7, 1995' (herein called the 'Standard Terms and Conditions of Trust'), and such provisions as are set forth in full and such provisions as are incorporated by reference constitute a single instrument. All references herein to Articles and Sections are to Articles and Sections of the Standard Terms and Conditions of Trust.

Witnesseth That:

In consideration of the promises and of the mutual agreements herein contained, the Depositor and the Trustee, agree as follows:

PART I

Standard Terms and Conditions of Trust Subject to the Provisions of Part II hereof, all the provisions contained in the Standard Terms and Conditions of Trust are herein incorporated by reference in their entirety and shall be deemed to be a part of this instrument as fully and to the same extent as though said provisions had been set forth in full in this instrument.

PART II

Special Terms and Conditions of Trust The following special terms and conditions are hereby agreed to:

(a) The Bonds defined in Section 1.01(1) listed in Schedule A hereto have been deposited in trust under this Trust Indenture and Agreement.

(b) The fractional undivided interest in and ownership of the Trust Fund represented by each Unit for a Trust on the Initial Date of Deposit is the amount set forth under the captions "Essential Information -- Fractional Undivided Interest in the Trust per Unit" in the Prospectus.

(c) The number of Units created of each Trust are as set forth under the caption "Essential Information -- Number of Units" in the Prospectus for each Trust.

(d) Notwithstanding anything to the contrary in the Standard Terms and Conditions of Trust, the phrase "Nuveen Tax-Exempt Unit Trust" shall be hereby replaced with the phrase "Nuveen Tax-Free Unit Trust."


In Witness Whereof, John Nuveen & Co. Incorporated, has caused this Trust Indenture and Agreement for Nuveen Tax-Free Unit Trust Series 943 to be executed by its President, one of its Vice Presidents or one of its Assistant Vice Presidents and its corporate seal to be hereto affixed and attested by its Secretary or its Assistant Secretary and The Chase Manhattan Bank has caused this Trust Indenture and Agreement to be executed by one of its Vice Presidents or Second Vice Presidents and its corporate seal to be hereto affixed and attested to by one of its Assistant Treasurers; all as of the day, month and year first above written.

John Nuveen & Co. Incorporated,
Depositor
By Larry Woods Martin
Authorized Officer
(Seal)
Attest:
By Morrison C. Warren
Assistant Secretary

The Chase Manhattan Bank, Trustee
By Timothy Kelley
Second Vice President
(Seal)
Attest:
By Joseph Lyons
Assistant Treasurer

Schedule A to the Trust Indenture and Agreement Securities Initially Deposited in Nuveen Tax-Free Unit Trust Series 943

(Note: Incorporated herein and made a part hereof is the "Schedule of

Investments" as set forth for each Trust in the Prospectus.)


EXHIBIT 3.1

(ON CHAPMAN AND CUTLER LETTERHEAD)

May 30, 1997

John Nuveen & Co. Incorporated
333 W. Wacker Drive
Chicago, Illinois 60606

RE: Nuveen Tax-Free Unit Trust, Series 943

Gentlemen:

We have served as counsel for you, as depositor of Nuveen Tax-Free Unit Trust, Series 943 (hereinafter referred to as the "Fund"), in connection with the issuance under the Trust Indenture and Agreement dated the date hereof between John Nuveen & Co. Incorporated, as Depositor, and The Chase Manhattan Bank, as Trustee, of Units of fractional undivided interest in the one or more Trusts of said Fund (hereinafter referred to as the "Units").

In connection therewith, we have examined such pertinent records and documents and matters of law as we have deemed necessary in order to enable us to express the opinions hereinafter set forth.

Based upon the foregoing, we are of the opinion that:

1. The execution and delivery of the Trust Indenture and Agreement and the establishment of book entry positions and the execution and issuance of certificates evidencing the Units in the Trusts of the Fund have been duly authorized; and

2. The book entry positions and certificates positions evidencing the Units in the Trusts of the Fund when duly executed and delivered or duly established by the Depositor and the Trustee in accordance with the aforementioned Trust Indenture and Agreement, will constitute valid and binding obligations of such Trusts and the Depositor in accordance with the terms thereof.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement (File No. 333-26607) relating to the Units referred to above and to the use of our name and to the reference to our firm in said Registration Statement and in the related Prospectus.

Respectfully submitted,

CHAPMAN AND CUTLER


EXHIBIT 4.4

CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the use of our report and to all references to our Firm included in or made a part of this Registration Statement.

ARTHUR ANDERSEN LLP

Chicago, Illinois

May 30, 1997


EXHIBIT 4.2

(On J. J. Kenny Co., Inc. Letterhead)

May 30, 1997

John Nuveen & Company
333 West Wacker Drive
Chicago, IL 60606

Re: Nuveen Tax Free Unit Trust, Series 943

Gentlemen:

We have examined the registration statement File No. 333-26607 for the above-captioned trust. We hereby acknowledge that Kenny S&P Evaluation Services, a division of J. J. Kenny Co., Inc. is currently acting as the evaluator for the trust. We hereby consent to the use in the Registration Statement of the reference to Kenny S&P Evaluation Services, a division of J. J. Kenny Co., Inc. as evaluator.

In addition, we hereby confirm that the ratings indicated in the Registration Statement for the respective bonds comprising the trust portfolio are the ratings currently indicated in our KENNYBASE database.

You are hereby authorized to file a copy of this letter with the Securities and Exchange Commission.

Sincerely,

Frank A. Ciccotto


EXHIBIT 4.1

(ON STANDARD & POOR'S, A DIVISION OF THE MCGRAW-HILL COMPANIES LETTERHEAD)

May 30, 1997

John Nuveen & Co. Incorporated
333 W. Wacker Drive
Chicago, IL 60606

RE:--Nuveen Tax-Free Unit Trust, Series 943

Gentlemen:

This is in response to your requests regarding the above-captioned fund which consists of separate underlying unit investment trusts (the "trusts"), SEC file # 333-26607.

We have reviewed the information presented to us and have assigned a "AAA" rating to the units of each insured trust and a "AAA" rating to the securities contained in each insured trust. The ratings are direct reflections of the portfolio of each insured trust, which will be composed solely of securities covered by bond insurance policies that insure against default in the payment of principal and interest on the securities contained in each insured trust for as long as they remain outstanding. We understand that the bonds described in the prospectus are the same as those in the attached list. Since such policies have been issued by MBIA which has been assigned a 'AAA' claims paying ability rating by S&P, S&P has assigned a "AAA" rating to the units of each insured trust and a "AAA" rating to the securities contained in each insured trust.

Standard & Poor's will maintain surveillance on the "AAA" rating until thirteen months from the initial Date of Deposit. On this date the rating will be automatically withdrawn by Standard & Poor's unless a post effective letter is requested by the trust.

You have permission to use the name of Standard & Poor's, a Division of The McGraw-Hill Companies and the above-assigned rating in connection with your dissemination of information relating to the insured trusts provided that it is understood that the ratings are not "market" ratings nor recommendations to buy, hold or sell the units of the insured trusts or the securities contained in the insured trusts. Further, it should be understood the rating on the units of each insured trust does not take into account the extent to which the trust's expenses or portfolio asset sales for less than the trust's purchase price will reduce payment to the unit holders of the interest and principal required to be paid on the portfolio assets. S&P reserves the right to advise its own clients, subscribers, and the public of the ratings. S&P relies on the sponsor and its counsel, accountants, and other experts for the accuracy and completeness of the information submitted in connection with the ratings. S&P does not independently verify the truth or accuracy of any such information.

This letter evidences our consent to the use of the name of Standard & Poor's, a Division of The McGraw-Hill Companies in connection with the rating assigned to the units of each insured trust in the registration statement or prospectus relating to the units and the trusts. However, this letter should not be construed as a consent by us, within the meaning of Section 7 of the Securities Act of 1933, to the use of the name of Standard & Poor's, a Division of The McGraw-Hill Companies in connection with the ratings assigned to the securities contained in the insured trusts. You are hereby authorized to file a copy of this letter with the Securities and Exchange Commission.

Please be certain to send us three copies of your final prospectus as soon as it becomes available. Should we not receive them within a reasonable amount of time after the closing or should they not conform to the certification received by us, we reserve the right to nullify the ratings.

Very truly yours,

STANDARD & POOR'S, A DIVISION OF THE MCGRAW-HILL COMPANIES

By Sanford Bragg


EXHIBIT 3.2

(ON CHAPMAN AND CUTLER LETTERHEAD)

May 30, 1997

John Nuveen & Co. Incorporated
333 W. Wacker Drive
Chicago, Illinois 60606

RE: Nuveen Tax-Free Unit Trust, Series 943

Gentlemen:

We have served as counsel for you, as Depositor of Nuveen Tax-Free Unit Trust, Series 943 (the "Fund") in connection with the issuance under the Trust Indenture and Agreement, dated the date hereof between John Nuveen & Co. Incorporated, as Depositor, and The Chase Manhattan Bank, as Trustee, of Units of fractional undivided interest (the "Units"), as evidenced by a book entry position or certificate, if requested by the purchaser of Units, in the one or more Trusts of said Fund.

We have also served as counsel for you in connection with all previous Series of the Nuveen Tax-Free Unit Trust and as such have previously examined such pertinent records and documents and matters of law as we have deemed necessary, including (but not limited to) the Trust Indenture and Agreements with respect to those series. We have also examined such pertinent records and documents and matters of law as we have deemed necessary including (but not limited to) the Trust Indenture and Agreement relating to Nuveen Tax-Free Unit Trust, Series 943.

We have concluded that the Trust Indenture and Agreement for the Fund and its counterpart in each of the prior issues of Nuveen Tax-Free Unit Trust are in all material respects substantially identical.

Based upon the foregoing, and upon such matters of law as we consider to be applicable we are of the opinion that, under existing federal income law:

(i) Each of the Trusts will not be an association taxable as a corporation but will be governed by the provisions of Subchapter J (relating to Trusts) of Chapter 1, Internal Revenue Code of 1986 (the "Code").

(ii) Each Unitholder will be considered as owning a pro rata share of each asset of the respective Trust of the Fund in the proportion that the number of Units of such Trust held by him bears to the total number of outstanding Units of such Trust. Under Subpart E, Subchapter J of Chapter 1 of the Code, income of each Trust will be treated as income of each Unitholder of the Trust in the proportion described and an item of Trust income will have the same character in the hands of a Unitholder as it would have in the hands of the Trustee. Accordingly, to the extent that the income of a Trust consists of interest and original issue discount excludable from gross income under Section 103 of the Code, such income will be excludable from Federal gross income of the Unitholder, except in the case of a Unitholder who is a substantial user (or a person related to such user) of a facility financed through issuance of any industrial development bonds or certain private activity bonds held by the Trust. In the case of such Unitholder who is a substantial user (and no other) interest received with respect to his Units attributable to such industrial development bonds or such private activity bonds is includable in his gross income. To the extent the Trust holds bonds that are "specified private activity bonds" within the meaning of Section 57(a)(5) of the Code, a Unitholder's pro rata portion of the income on such Bonds will be included as an item of tax preference in the computation of the alternative minimum tax applied to all taxpayers (including non-corporate taxpayers) subject to the alternative minimum tax. In the case of certain corporations, interest on all of the Bonds is included in computing the alternative minimum tax pursuant to Sections 56(c) of the Code, the enviromental tax (the "Superfund Tax") imposed by Sections 59A of the Code, and the branch profits tax imposed by Section 884 of the Code with respect to U.S. branches of foreign corporations.

(iii) Gain or loss will be recognized to a Unitholder upon redemption or sale of his Units. Such gain or loss is measured by comparing the proceeds of such redemption or sale with the adjusted basis of the Units. If a Bond is acquired with accrued interest, that portion of the price paid for the accrued interest is added to the tax basis of the Bond. When this accrued interest is received, it is treated as a return of capital and reduces the tax basis of the Bond. If a Bond is purchased for a premium, the amount of the premium is added to the tax basis of the Bond. Bond premium is amortized over the remaining term of the Bond, and the tax basis of the Bond is reduced each tax


year by the amount of the premium amortized in that tax year. Unitholders must reduce the tax basis of their Units for their share of accrued interest received by the Trust, if any, on Bonds delivered after the Unitholders pay for their Units to the extent that such interest accrued on such Bonds before the date the Trust acquired ownership of the Bonds (and the amount of this reduction may exceed the amount of accrued interest paid to the seller) and, consequently, such Unitholders may have an increase in taxable gain or reduction in capital loss upon the disposition of such Units. Such gain or loss is measured by comparing the proceeds of such redemption or sale with the adjusted basis of such Units. In addition, such basis will be increased by both the Unitholder's aliquot share of the accrued original issue discount (and market discount, if the Unitholder elects to include market discount in income as it accrues) with respect to each Bond held by the Trust with respect to which there was original issue discount at the time the Bond was issued (or which was purchased with market discount) and reduced by the annual amortization of bond premium, if any, on Bonds held by the Trust.

(iv) If the Trustee disposes of a Trust asset (whether by sale, payment on maturity, redemption or otherwise), gain or loss is recognized to the Unitholder and the amount thereof is measured by comparing the Unitholder's aliquot share of the total proceeds from the transaction with his basis for his fractional interest in the asset disposed of. Such basis is ascertained by apportioning the tax basis for his Units among each of the Trust assets (as of the date on which his Units were acquired) ratably according to their values as of the valuation date nearest the date on which he purchased such Units. A Unitholder's basis in his Units and of his fractional interest in each Trust asset must be reduced by the amount of his aliquot share of accrued interest received by the Trust, if any, on Bonds delivered after the Unitholders pay for their Units to the extent that such interest accrued on the Bonds before the date the Trust acquired ownership of the Bonds (and the amount of this reduction may exceed the amount of accrued interest paid to the seller), must be reduced by the annual amortization of bond premium, if any, on Bonds held by the Trust; and must be increased by the Unitholder's share of accrued original issue discount (and market discount, if the Unitholder elects to include market discount in income as it accrues) with respect to each Bond which, at the time the Bond was issued, had original issue discount (or which was purchased with market discount).

(v) In the case of any Bond held by the Trust where the "stated redemption price at maturity" exceeds the "issue price," such excess shall be original issue discount. With respect to each Unitholder, upon the purchase of his Units subsequent to the original issuance of Bonds held by the Trust Section 1272(a)(7) of the Code provides for a reduction in the accrued "daily portion" of such original issue discount upon the purchase of a Bond subsequent to the Bond's original issue, under certain circumstances. In the case of any Bond held by the Trust the interest on which is excludable from gross income under Section 103 of the Code, any original issue discount which accrues with respect thereto will be treated as interest which is excludable from gross income under Section 103 of the Code.

(vi) In the case of Trusts for which MBIA Insurance Corporation ("MBIA") insurance with respect to each of the Bonds deposited therein has been obtained by the Depositor or the issuer or underwriter of the Bonds, we have examined the form of MBIA's policy or several policies of insurance (the "Policies") which have been delivered to the Trustee. Assuming issuance of Policies in such form, in our opinion, any amounts paid under said Policies representing maturing interest on defaulted Bonds held by the Trustee will be excludable from Federal gross income if, and to the same extent as, such interest would have been so excludable if paid in normal course of business by the respective issuer of the defaulted Bonds, provided that, at the time such policies are purchased, the amounts paid for such policies are reasonable, customary and consistent with the reasonable expectation that the issuer of the Bonds, rather than the insurer, will pay debt service on the Bonds. Paragraph (ii) of this opinion is accordingly applicable to Policy proceeds representing maturing interest.

Because the Trusts do not include any "private activity bonds" within the meaning of Section 57(a)(5) of the Code issued on or after August 8, 1986, none of the Trust Fund's interest income shall be treated as an item of tax preference when computing the alternative minimum tax. In the case of corporations, for taxable years beginning after December 31, 1986, the alter-native minimum tax and the Superfund Tax depend upon the corporation's alternative minimum taxable income ("AMTI"), which is the corporation's taxable income with certain adjustments.


Pursuant to Section 56(c) of the Code, one of the adjustment items used in computing AMTI and the Superfund Tax of a corporation (other than an S Corporation, Regulated Investment Company, Real Estate Investment Trust or REMIC) for tax years beginning in 1989 is an amount equal to 75% of the excess of such corporation's "adjusted current earnings" over an amount equal to its AMTI (before such adjustment item and the alternative tax net operating loss deduction). "Adjusted current earnings" includes all tax-exempt interest, including interest on all Bonds in the Trust, and tax-exempt original issue discount. Under current code provisions, the Superfund Tax does not apply to tax years beginning on or after January 1, 1996. Legislative proposals have been made that would extend the Superfund Tax.

Sections 1288 and 1272 of the Code provide a complex set of rules governing the accrual of original issue discount. These rules provide that original issue discount accrues either on the basis of a constant compound interest rate or ratably over the term of the Bond, depending on the date the Bond was issued. In addition, special rules apply if the purchase price of a Bond exceeds the original issue price plus the amount of original issue discount which would have previously accrued based upon its issue price (its "adjusted issue price"). The application of these rules will also vary depending on the value of the bond on the date a Unitholder acquires his Units, and the price the Unitholder pays for his Units.

Effective for tax returns filed after December 31, 1987, all taxpayers are required to disclose to the Internal Revenue Service the amount of tax-exempt interest earned during the year.

Section 265 of the Code provides for a reduction in each taxable year of 100% of the otherwise deductible interest on indebtedness incurred or continued by financial institutions, to which either Section 585 or Section 593 of the Code applies, to purchase or carry obligations acquired after August 7, 1986 (with certain exceptions), the interest on which is exempt from Federal income taxes for such taxable year. Under rules prescribed by Section 265, the amount of interest otherwise deductible by such financial institutions in any taxable year which is deemed to be attributable to tax-exempt obligations acquired after August 7, 1986, will generally be the amount that bears the same ratio to the interest deduction otherwise allowable (determined without regard to Section 265) to the taxpayer for the taxable year as the taxpayer's average adjusted basis (within the meaning of Section 1016) of tax-exempt obligations acquired after August 7, 1986, bears to such average adjusted basis for all assets of the taxpayer.

We also call attention to the fact that, under Section 265 of the Code, interest on indebtedness incurred or continued to purchase or carry Units is not deductible for Federal income tax purposes. Under rules used by the Internal Revenue Service for determining when borrowed funds are con-sidered used for the purpose of purchasing or carrying particular assets, the purchase of Units may be considered to have been made with borrowed funds even though the borrowed funds are not directly traceable to the purchase of Units. However, these rules generally do not apply to interest paid on indebtedness incurred for expenditures of a personal nature such as a mortgage incurred to purchase or improve a personal residence.

"The Revenue Reconciliation Act of 1993" (the "Tax Act") subjects tax-exempt bonds to the market discount rules of the Code effective for bonds purchased after April 30, 1993. In general, market discount is the amount (if any) by which the stated redemption price at maturity exceeds an investor's purchase price (except to the extent that such difference, if any, is attributable to original issue discount not yet accrued) subject to a statutory de minimis rule. Market discount can arise based on the price a Trust pays for Bonds or the price a Unitholder pays for his or her Units. Under the Tax Act, accretion of market discount is taxable as ordinary income; under prior law, the accretion had been treated as capital gain. Market discount that accretes while a Trust holds a Bond would be recognized as ordinary income by the Unitholders when principal payments are received on the Bond, upon sale or at redemption (including early redemption), or upon the sale or redemption of his or her Units, unless a Unitholder elects to include market discount in taxable income as it accrues.

We have not examined any of the Bonds to be deposited and held in the Trust or the proceedings for the issuance thereof or the opinions of bond counsel with respect thereto, and therefore express no opinion as to the exemption from State income taxed of interest on the Bonds if received directly be a Unitholder.


We hereby consent to the filing of this opinion as an exhibit to the Registration Statement (File No. 333-26607) relating to the Units referred to above and to the use of our name and to the reference to our firm in said Registration Statement and in the related Prospectus.

Respectfully submitted,

CHAPMAN AND CUTLER


EXHIBIT 3.3

(ON SHERMAN & HOWARD L.L.C. LETTERHEAD)

MAY 30, 1997

Nuveen Tax-Free Unit Trust,
Series 943
c/o Chase Manhattan Bank
Nuveen Administration Department
4 New York Plaza-3rd Floor
New York, New York 10004-2413

RE: Colorado Insured Trust 68

Ladies and Gentlemen:

We have acted as special counsel to the Nuveen Tax-Free Unit Trust, Series
943 (the "Fund") with respect to certain applications of the income tax law of the State of Colorado to the above captioned Trust(s) created as part of the Fund (the "Colorado Trust(s)") and to the holders of certificates or registered holders of book entry positions evidencing ownership of fractional undivided interest ("Units") in the Colorado Trust(s) who are residents of the State of Colorado ("Colorado Unitholders").

In this connection, we have examined the form of an opinion of Chapman and Cutler, counsel for John Nuveen & Co. Incorporated, the Depositor, to be dated today, as to the federal tax status of the several constituent trusts of the Fund and the holders of Units, including the Colorado Trust(s) and the Colorado Unitholders. Chapman and Cutler has advised us that its opinion, as executed and delivered, will be in all material respects identical to such form. We have also examined such pertinent materials and matters of law as we deemed necessary in order to enable us to express the opinions hereinafter set forth.

It is our understanding that a Colorado Trust will consist of obligations which were issued by the State of Colorado or its political subdivisions or by the United States or possessions of the United States, including Puerto Rico, the Virgin Islands and Guam ("Bonds"). The following opinion assumes that the Colorado Trust(s) will have no income other than (i) interest income on the Bonds, (ii) insurance proceeds, if any, referred to in paragraph (3) below, and
(iii) gain on the disposition of such Bonds.

Based on the foregoing and, with your permission, in reliance upon the opinion of Chapman and Cutler referred to above, it is our opinion that application of existing Colorado income tax law would be as follows:

The Chapman and Cutler opinion concludes that each trust, including the Colorado Trust(s), will be governed by the provisions of subchapter J of chapter 1, Internal Revenue Code of 1986 (the "Code"). Although there are no Colorado income tax statutes similar to subchapter J of chapter 1 of the Code, the Colorado statutory provisions generally operate to reach the same result that is reached under the federal system. The income, deduction, and credit items directly reportable by the "owner" of a trust under the federal rules are also directly reportable by that same person under Colorado rules. Conversely, items of income, deduction, and credit not reportable for federal purposes typically are not reported for Colorado purposes. For resident individuals, estates, and trusts, Colorado law imposes a tax on federal taxable income, as defined in the Code, with specific modifications. For corporations, a tax is imposed on net income derived from sources within Colorado. A corporation's net income is defined as federal taxable income, again with certain modifications. There are two modifications relevent to this opinion. First, interest income less amortization of premium on obligations of any state or any politcal subdivision thereof must be added to federal taxable income; however, interest income on obligations of the State of Colorado or a political subdivision thereof which are issued on or after May 1, 1980 is specifically excluded from this modification. Interest income on obligations of the State of Colorado or a political subdivision thereof which were issued before May 1, 1980 is also excluded from this modification to the extent that such interest is specifically exempt from income taxation under the laws of the State of Colorado authorizing the issuance of such obligations. The second relevent modification is that interest income on obligations of the United States and its possessions is subtracted from federal taxable income to the extent it was included in federal taxable income.

Colorado also imposes on individuals, estates, and trusts an alternative minimum tax based on the federal alternative minimum taxable income determined pursuant to Section 55 of the Code. As with the modifications to federal taxable income pertaining to interest income on Colorado exempt obligations, interest income on obligations of the State of Colorado and political sudivisions thereof which are issued on or after May 1, 1980, or which were issued prior to May 1, 1980 but have interest specifically exempt from income taxation under the Colorado laws authorizing the issuance of such obligations, is not included in the modification that otherwise requires that


interest income from obligations of states or political subdivisions thereof be added to federal alternative minimum taxable income. Furthermore, interest income on obligations of the United States and its possessions is subtracted from federal alternative minimum taxable income.

Because Colorado income tax law is based upon the federal law and in light of the opinion of Chapman and Cutler, the Colorado Trust(s) will not be association(s) taxable as corporation(s) for purposes of Colorado income taxation.

With respect to Colorado Unitholders, in view of the relationship between federal and Colorado tax computations described above and the opinion of Chapman and Cutler referred to above:

1.--Each Colorado Unitholder will be treated as owning a share of each asset of the Colorado Unitholder's respective Colorado Trust for Colorado income tax purposes, in the proportion that the number of Units of such Colorado Trust held by the Unitholder bears to the total number of outstanding Units of the Colorado Trust, and the income of the Colorado Trust will therefore be treated as the income of each Colorado Unitholder under Colorado law in the proportion described;

2.--Interest on Bonds that would not be included in the base subject to Colorado income tax or Colorado alternative minimum tax when paid directly to a Colorado Unitholder will not be included in the base subject to Colorado income tax or alternative minimum tax when received by a Colorado Trust and attributed to such Colorado Unitholder and when distributed to such Colorado Unitholder;

3.--Proceeds paid under an insurance policy, if any, issued to the issuer of the Bonds involved, to the Depositor prior to deposit of the Bonds in a Colorado Trust, or to a Colorado Trust, which proceeds represent maturing interest on defaulted Bonds and which proceeds would not be included in the base subject to Colorado income tax or Colorado alternative minimum tax when paid directly to a Colorado Unitholder will not be included in the base subject to Colorado income and alternative minimum tax when received by a Colorado Trust and attributed to such Colorado Unitholder and when distributed to such Colorado Unitholder;

4.--Each Colorado Unitholder will realize gain or loss taxable in Colorado when the Colorado Unitholder's respective Colorado Trust disposes of a Bond (whether by sale, exchange, redemption, or payment at maturity) or when the Colorado Unitholder redeems or sells Units at a price that differs from original cost as adjusted for amortization of bond discount or premium and other basis adjustments (including any basis reduction that may be required to reflect a Colorado Unitholder's share of interest, if any, accruing on Bonds during the interval between the Colorado Unitholder's settlement date and the date such Bonds are delivered to the Colorado Trust, if later);

5.--Tax cost reduction requirements relating to amortization of bond premium may, under some circumstances, result in Colorado Unitholders realizing gain taxable in Colorado when their Units are sold or redeemed for an amount equal to or less than their original cost; and

6.--If interest on indebtedness incurred or continued by a Colorado Unitholder to purchase Units in the Colorado Trust is not deductible for federal income tax purposes, it will not be deductible for Colorado income tax purposes.

We have not examined any of the Bonds to be deposited in the Colorado Trusts(s) and express no opinion as to whether the interest (or, if applicable, insurance proceeds representing interest) on any such Bonds would in fact be included in the base subject to Colorado income tax or Colorado alternative minimum tax if directly received by a Colorado Unitholder.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement (File No. 333-26607) relating to the Units referred to above and to the use of our name and the reference to our firm in such Registration Statement, and in the related Prospectus, under the "Tax Status" heading for each Colorado Trust in the Fund. In addition, we authorize Chase Manhattan Bank to rely upon this opinion in its capacity as Trustee of the Fund.

Very truly yours,

SHERMAN & HOWARD L.L.C.


EXHIBIT 3.3

(ON EDWARDS & ANGELL LETTERHEAD)

MAY 30, 1997

Nuveen Tax-Free Unit Trust,
Series 943
In care of John Nuveen & Co. Incorporated 333 West Wacker Drive
Chicago, IL 60606

Attention of Gifford R. Zimmerman
Vice President, Assistant General Counsel and Assistant Secretary

The Chase Manhattan Bank,
as Trustee of Nuveen Tax-Free Unit Trust, Series 943
4 New York Plaza, 3rd Floor
New York, NY 10004-2413

Re:--New York Insured Trust 269

Dear Sirs:

We have acted as special counsel, with respect to New York State and New York City tax matters, to the above Trusts(s) ("New York Trust(s)") of Nuveen Tax-Free Unit Trust, Series 943 (the "Fund") concerning a Registration Statement (No. 333-26607) on Form S-6 under the Securities Act of 1933, as amended (the "Registration Statement"), covering the issuance by the New York Trusts(s) of units of fractional undivided interest in the New York Trust(s)( "Units").

We have not been furnished with a copy of the Registration Statement or the prospectus, which is a part of the Registration Statement, relating to the issuance by the New York Trust(s) of the Units. However, John Nuveen & Co. Incorporated has authorized us to assume that the proposed offer and sale of the Units will be carried out in that same manner and upon the same terms and conditions as that described in the prospectus for the Nuveen Tax Exempt Unit Trust, Insured Series 193, dated May 19, 1989, which we were furnished and did examine. In the case of a Fund which contains a New York Insured Trust or New York Intermediate Insured Trust, we also were not furnished the Insurance Agreement (the "Policy") between the Municipal Bond Investors Assurance Corporation (the "Insurer"), the Depositor and the Trustee. However, John Nuveen & Co. Incorporated has authorized us to assume that the Policy will be implemented at the closing of the Trust and be in substance and form materially similiar to the Policy applicable to New York Insured Trust 108, which we were furnished and did examine.

We have not been furnished with a copy of the Opinion of Chapman & Cutler on the Federal Tax status of the Fund, its constituent Trusts and their Unitholders. However, John Nuveen & Co. Incorporated has authorized us to assume that such Opinion will be in substance and form materially similar to that which was issued in connection with Nuveen Tax Exempt Unit Trust, Insured Series 193 dated May 19, 1989, which we were furnished and did examine.

Based on the foregoing, we are of the opinion that, for purposes of New York State and New York City franchise taxes, a New York Trust will be a trust not an association taxable as a corporation; the proposed activities of a New York Trust will not constitute doing business within the meaning of section 208.1 of the New York Tax Law or section R46-3.0 of the N.Y.C. Administrative Code; a New York Trust will not be subject to New York State or New York City franchise tax imposed on business corporations; a New York Trust will not be subject to the unincorporated business income tax imposed by Article 23 of the N.Y. Tax Law or Chapter 46, Title S of the N.Y.C. Administrative Code; and the income of a New York Trust will be treated as income of the Unitholders.

We are further of the opinion that, under existing laws and administration of the affairs of the New York Trust(s):

(A)--Interest on obligations issued by New York State, a political subdivision thereof, Puerto Rico, the Virgin Islands, Guam, the Northern Mariana Islands, or other possessions of the United States within the meaning of Section 103(c) of the Internal Revenue Code of 1986, as amended, ("Obligations") which would be exempt from New York State or New York City personal income tax if directly received by a Unitholder, will retain its status as tax-exempt interest when received by a New York Trust and distributed to such Unitholder;


(B)--Interest (less amortizable premium, if any) derived from a New York Trust by a Unitholder who is a resident of New York State (or New York City) in respect of Obligations issued by states other than New York (or their political subdivisions) will be subject to New York State (or New York City) personal income tax;

(C)--A Unitholder who is a resident of New York State (or New York City) will be subject to New York State (or New York City) personal income tax with respect to gains realized when Obligations held in the Unitholder's respective New York Trust are sold, redeemed or paid at maturity or when the Unitholder's Units are sold or redeemed; such gain will equal the proceeds of sale, redemption or payment less the tax basis of the Obligation or Unit (adjusted to reflect (a) the amortization of premium or discount (if any) on Obligations held by the New York Trust, (b) accrued original issue discount with respect to each Obligation which, at the time the Obligation was issued, had original issue discount, and (c) the deposit of Obligations with accrued interest in the New York Trust after the Unitholder's settlement date);

(D)--Interest or gain from a New York Trust derived by a Unitholder who is not a resident of New York State (or New York City) will not be subject to New York State (or New York City) personal income tax, unless the Units are property employed in a business, trade, profession or occupation carried on in New York State (or New York City);

(E)--In the case of a New York Insured Trust or New York Intermediate Insured Trust, amounts paid under the Policies representing maturing interest on defaulted Obligations held by the Trustee in the Trust will be excludable from New York State and New York City income if, and to the same extent as, such interest would have been excludable if paid by the respective issuer; and

(F)--Amounts distributable from a New York Trust which are, pursuant to a Unitholder's election, automatically reinvested in Nuveen Municipal Bond Fund, Inc. will be treated as if actually distributed to and reinvested by such Unitholder.

Because of the requirement that tax cost basis be adjusted as discussed in
(C) above, under some circumstances a Unitholder may realize taxable gain when his Units are sold or redeemed for an amount equal to or less than his original cost.

Although interest on Obligations issued by New York (or a political subdivision thereof) would generally be exempt from New York State and New York City tax, a special limitation may apply with respect to private activity bonds which are not qualified bonds within the meaning of section 103(b)(1) of the Internal Revenue Code of 1986, as amended. The interest on such bonds, to the extent received by a Unitholder who is a "substantial user" (or person related to such user) of the facilities financed by such bonds, will not be exempt from New York State and New York City tax for any period during which such bonds are beneficially held by such "substantial user" or "related person".

As an additional matter, if borrowed funds are used to purchase Units in a New York Trust, all (or part) of the interest on such indebtedness will not be deductible for New York State and New York City tax purposes. The purchase of Units may be considered to have been made with borrowed funds even though such funds are not directly traceable to the purchase of Units in any New York Trust.

We are further of the opinion that, for purposes of the New York State and New York City franchise tax on corporations, Unitholders which are subject to such tax will be required to include in their entire net income any interest or gains distributed to them in respect of obligations of any state or political subdivision thereof, including New York. No opinion is rendered on the includability in entire net income of interest distributed to such Unitholders in respect of obligations issued by Puerto Rico, the Virgin Islands, Guam, the Northern Mariana Islands or other possessions of the United States within the meaning of Section 103(c) of the Internal Revenue Code of 1986, as amended.

The foregoing opinions are based upon present provisions of Federal, New York State and New York City law, administrative interpretations thereof and court decisions.

In connection with this offering, we have not examined any of the obligations to be deposited in the New York Trust(s), and express no opinion whether the interest on any such obligations is, in fact, exempt from Federal, New York State, or New York City income taxation, or that such interest would be tax-exempt under Federal, New York State, or New York City law if directly received by a Unitholder, nor have we made any review of the proceedings relating to the issuance of any such obligations.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement and to the reference to our firm in such Registration Statement and the Prospectus included therein.

Very truly yours,

EDWARDS & ANGELL


EXHIBIT 4.3

(ON CARTER LEDYARD & MILBURN LETTERHEAD)

May 30, 1997

Nuveen Tax-Free Unit Trust, Series 943
c/o John Nuveen & Co. Incorporated,
as Depositor of Nuveen Tax-Free Unit
Trust, Series 943
333 W. Wacker Drive
Chicago, Illinois 60606

RE: Nuveen Tax-Free Unit Trust, Series 943

Dear Sirs:

We hereby consent to the reference to our firm under the caption "What is the Tax Status of Unitholders?" in the Registration Statement and related Prospectus of Nuveen Tax-Free Unit Trust, Series 943 for the registration of units of fractional undivided interest in the Fund in the aggregate principal amount as set forth in the Closing Memorandum dated today's date.

Very truly yours,

CARTER, LEDYARD & MILBURN


ARTICLE 6
This schedule contains summary financial information extracted from the Colorado Insured Trust 68 which is incorporated in the Prospectus dated May 30, 1997 and is qualified in its entirety by reference to such prospectus.
SERIES:
NUMBER: 001
NAME: Colorado Insured


PERIOD TYPE OTHER
FISCAL YEAR END APR 30 1998
PERIOD END APR 30 1998
INVESTMENTS AT COST 3,374,230
INVESTMENTS AT VALUE 3,384,388
RECEIVABLES 35,928
ASSETS OTHER 0
OTHER ITEMS ASSETS 0
TOTAL ASSETS 3,425,416
PAYABLE FOR SECURITIES 0
SENIOR LONG TERM DEBT 0
OTHER ITEMS LIABILITIES 35,928
TOTAL LIABILITIES 35,928
SENIOR EQUITY 0
PAID IN CAPITAL COMMON 0
SHARES COMMON STOCK 35,000
SHARES COMMON PRIOR 0
ACCUMULATED NII CURRENT 0
OVERDISTRIBUTION NII 0
ACCUMULATED NET GAINS 0
OVERDISTRIBUTION GAINS 0
ACCUM APPREC OR DEPREC 0
NET ASSETS 3,384,388
DIVIDEND INCOME 0
INTEREST INCOME 0
OTHER INCOME 0
EXPENSES NET 0
NET INVESTMENT INCOME 0
REALIZED GAINS CURRENT 0
APPREC INCREASE CURRENT 0
NET CHANGE FROM OPS 0
EQUALIZATION 0
DISTRIBUTIONS OF INCOME 0
DISTRIBUTIONS OF GAINS 0
DISTRIBUTIONS OTHER 0
NUMBER OF SHARES SOLD 0
NUMBER OF SHARES REDEEMED 0
SHARES REINVESTED 0
NET CHANGE IN ASSETS 0
ACCUMULATED NII PRIOR 0
ACCUMULATED GAINS PRIOR 0
OVERDISTRIB NII PRIOR 0
OVERDIST NET GAINS PRIOR 0
GROSS ADVISORY FEES 0
INTEREST EXPENSE 0
GROSS EXPENSE 0
AVERAGE NET ASSETS 0
PER SHARE NAV BEGIN 96.70
PER SHARE NII 0
PER SHARE GAIN APPREC 0
PER SHARE DIVIDEND 0
PER SHARE DISTRIBUTIONS 0
RETURNS OF CAPITAL 0
PER SHARE NAV END 0
EXPENSE RATIO 0
AVG DEBT OUTSTANDING 0
AVG DEBT PER SHARE 0

ARTICLE 6
This schedule contains summary financial information extracted from the New York Insured Trust 269 which is incorporated in the Prospectus dated May 30, 1997 and is qualified in its entirety by reference to such prospectus.
SERIES:
NUMBER: 002
NAME: New York Insured


PERIOD TYPE OTHER
FISCAL YEAR END APR 30 1998
PERIOD END APR 30 1998
INVESTMENTS AT COST 3,350,026
INVESTMENTS AT VALUE 3,367,582
RECEIVABLES 29,862
ASSETS OTHER 0
OTHER ITEMS ASSETS 0
TOTAL ASSETS 3,402,644
PAYABLE FOR SECURITIES 0
SENIOR LONG TERM DEBT 0
OTHER ITEMS LIABILITIES 29,862
TOTAL LIABILITIES 29,862
SENIOR EQUITY 0
PAID IN CAPITAL COMMON 0
SHARES COMMON STOCK 35,000
SHARES COMMON PRIOR 0
ACCUMULATED NII CURRENT 0
OVERDISTRIBUTION NII 0
ACCUMULATED NET GAINS 0
OVERDISTRIBUTION GAINS 0
ACCUM APPREC OR DEPREC 0
NET ASSETS 3,367,582
DIVIDEND INCOME 0
INTEREST INCOME 0
OTHER INCOME 0
EXPENSES NET 0
NET INVESTMENT INCOME 0
REALIZED GAINS CURRENT 0
APPREC INCREASE CURRENT 0
NET CHANGE FROM OPS 0
EQUALIZATION 0
DISTRIBUTIONS OF INCOME 0
DISTRIBUTIONS OF GAINS 0
DISTRIBUTIONS OTHER 0
NUMBER OF SHARES SOLD 0
NUMBER OF SHARES REDEEMED 0
SHARES REINVESTED 0
NET CHANGE IN ASSETS 0
ACCUMULATED NII PRIOR 0
ACCUMULATED GAINS PRIOR 0
OVERDISTRIB NII PRIOR 0
OVERDIST NET GAINS PRIOR 0
GROSS ADVISORY FEES 0
INTEREST EXPENSE 0
GROSS EXPENSE 0
AVERAGE NET ASSETS 0
PER SHARE NAV BEGIN 96.22
PER SHARE NII 0
PER SHARE GAIN APPREC 0
PER SHARE DIVIDEND 0
PER SHARE DISTRIBUTIONS 0
RETURNS OF CAPITAL 0
PER SHARE NAV END 0
EXPENSE RATIO 0
AVG DEBT OUTSTANDING 0
AVG DEBT PER SHARE 0

MEMORANDUM

NUVEEN TAX-FREE UNIT TRUST, SERIES 943

FILE NO. 333-26607

The Prospectus and the Indenture filed with Amendment No. 1 of the Registration Statement on Form S-6 have been revised to reflect information regarding the execution of the Indenture and the deposit of bonds on May 30, 1997, and to set forth certain statistical data based thereon. In addition, there are a number of other changes from the Prospectus as originally filed to which reference is made, including the increase in the size of the Fund, a corresponding increase in the number of Units and a change in the individual trusts constituting the Fund. All references to the Units, prices and related statistical data will apply to each trust of the Fund and the Units thereof individually.

Except for such updating, an effort has been made to set forth below each of the changes and also to reflect the same by marking the Prospectus transmitted with the Amendment. Also, differences between the Final Prospectus relating to the previous series of the Nuveen Tax-Exempt Unit Trust and the subject Prospectus have been indicated.

FORM S-6

FACING SHEET. The file number is now shown.

THE PROSPECTUS

PART A-PAGE 2.--The "Estimated Long-Term Return" and "Estimated Current

Return" to Unitholders under each Trust under each of the distribution plans are stated.

PART A-PAGES 1 - 2.--Essential information for each of the Trusts, including applicable footnotes, has been completed for this Series.

PART A-PAGES 1 - 2.--The date of the Indenture has been inserted in Section 1 along with the size and number of Units of each of the Trusts.

PART A-PAGES 1 - 6 et seq.--The following information for each Trust appears on the pages relating to such trust:

The estimated daily accrual of interest under the plans of distribution for each of the Trusts

Data regarding the composition of the portfolio of each Trust

Disclosure regarding the states' economic and legislative matters relevant to investors of state trusts

Concentrations of issues by purpose in each Trust

The approximate percentage of the bonds in the portfolio of each Trust acquired in distributions where the Sponsor was either the sole underwriter or manager or member of the underwriting syndicate

The percentage of "when issued" bonds in the portfolio of each Trust

The schedule of investments for each Trust, including the notes thereto

Descriptions of the opinions of the special tax counsel for state trusts

The Record Dates and Distribution Dates for interest distributions for each Trust

The statements of condition for each Trust and the accountant's report with regard thereto.

The amount of the Trustee's Fee

CHAPMAN AND CUTLER

Chicago, Illinois

May 30, 1997