NUVEEN UNIT TRUSTS SERIES 12
S-6, 1998-04-02
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<PAGE>


                                              40 Act File No. 811-08103

                        SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, D.C. 20549
                                     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 UNIT TRUST, SERIES 12

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
                         Attention: Gifford R. Zimmerman
                         333 West Wacker Drive
                         Chicago, Illinois 60606

                         CHAPMAN AND CUTLER
                         Attention: 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 (date) pursuant to paragraph (b)

( ) 60 days after filing pursuant to paragraph (a)

( ) on (date) pursuant to paragraph (a) of Rule (485 or 486)

E. Title of securities being registered: Units of undivided fractional
   beneficial interest.

F. Approximate date of proposed sale to the public:

                 AS SOON AS PRACTICABLE AFTER THE EFFECTIVE
                     DATE OF THE REGISTRATION STATEMENT

( ) Check box if it is proposed that this filing will become effective on 
    (date) at (time) pursuant to Rule 487.

     The registrant hereby amends this Registration Statement on such date or 
dates as may be necessary to delay its effective date until the registrant 
shall file a further amendment which specifically states that this 
Registration Statement shall thereafter become effective in accordance with 
Section 8(a) of the Securities Act of 1933 or until the Registration 
Statement shall become effective on such date as the Commission, acting 
pursuant to said Section 8(a), may determine.

<PAGE>

                          NUVEEN UNIT TRUST, SERIES 12
 
                             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)


<TABLE>
<S>  <C>                                          <C> <C>
FORM N-8B-2                                                FORM S-6
ITEM NUMBER                                                HEADING IN PROSPECTUS
          I. ORGANIZATION AND GENERAL INFORMATION
 1.  (a)  Name of trust                                 )  Prospectus 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 Sponsor
 4.  Name and address of principal Underwriter          )  Information About the Sponsor
 5.  Organization of trust                              )  Nuveen Unit Trusts
 6.  Execution and termination of Trust Agreement       )  Nuveen Unit Trusts
                                                        )  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
                                                        )  Composition of Trusts
                                                        )  Portfolio
                                                        )  Distributions to Unitholders
                                                        )  Redemption
                                                        )  Removal of Securities From The Trusts
                                                        )  Information About the Trustee
                                                        )  Information About the Sponsor
                                                        )  Other Information
                                                        )  Tax Status
11.  Type of securities comprising units                )  Nuveen Unit Trusts
                                                        )  Portfolio
                                                        )  Summary of Portfolios
                                                        )  Composition of Trusts
                                                        )  Objectives of The Trusts
12.  Certain information regarding                      )  *
     periodic payment certificates                      )
13.  (a)  Load, fees, expenses, etc.                    )  Essential Information
                                                        )  Public Offering Price
                                                        )  Market For Units
                                                        )  Evaluation of Securities at the
                                                        )  Initial Date of Deposit
                                                        )  Trust Operating Expenses
                                                        )  Distributions To Unitholders
                                                        )  Summary Of Portfolios
                                                        )  Reports To Unitholders
     (b)  Certain information regarding                 )  *
          periodic payment certificates                 )
     (c)  Certain percentages                           )  Public Offering Price
                                                        )  Market For Units
                                                        )  Evaluation of Securities at the
                                                        )  Initial Date of Deposit
</TABLE>

<PAGE>

<TABLE>
<C>  <S>  <C>                                          <C> <C>
     (d)  Certain other fees, etc. payable by holders   )  Evaluation of Securities at the
                                                        )  Initial Date of Deposit
                                                        )  Normal Trust Operating Expenses
                                                        )  Ownership And Transfer Of Units
     (e)  Certain profits received by depositor,        )  Composition Of Trusts
          principal underwriter, trustee or             )  Purchase of Units by the Sponsor
          affiliated persons                            )
 
     (f)  Ratio of annual charges to income             )  *
14.  Issuance of trust's securities                     )  Summary of Portfolios
                                                        )  Distributions To Unitholders
                                                        )  How Certificates Are Issued
                                                        )  Redemption
15.  Receipt and handling of payments                   )  *
     from purchasers                                    )
16.  Acquisition and Disposition of                     )  Nuveen Unit Trusts
     Underlying Securities                              )
                                                        )  Summary of Portfolios
                                                        )  Composition of Trusts
                                                        )  Redemption
                                                        )  Removal of Securities From The Trusts
                                                        )  Other Information
17.  Withdrawal or redemption                           )  Market For Units
                                                        )  Redemption
                                                        )  Purchase of Units By The Sponsor
18.  (a)  Receipt and disposition of income             )  Summary of Portfolios
                                                        )  Distributions To Unitholders
                                                        )  Reports To Unitholders
     (b)  Reinvestment of distributions                 )  Accumulation Plan
     (c)  Reserves or special funds                     )  Summary of Portfolios
                                                        )  Distributions To Unitholders
     (d)  Schedule of distributions                     )  *
19.  Records, accounts and reports                      )  Distributions To Unitholders
                                                        )  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                         )
</TABLE>

<PAGE>

<TABLE>
<C>  <S>  <C>                                          <C> <C>
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                       )  Distribution of Units 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                           )  Essential Information
                                                        )  Public Offering Price
                                                        )  Evaluation of Securities at the Date of
                                                           Deposit
                                                        )  Trust Operating Expenses
     (b)  Schedule as to offering price                 )  *
     (c)  Variation in offering price to                )  Public Offering Price
          certain persons                               )  Evaluation of Securities at
                                                        )  The Date of Deposit
45.  Suspension of redemption rights                    )  *
46.  (a)  Redemption valuation                          )  Unit Value and Evaluation
                                                        )  Redemption Without Charge
                                                        )  Purchase of Units By The Sponsor
     (b)  Schedule as to redemption price               )  *
47.  Maintenance of position in underlying              )  Public Offering Price
     securities                                         )  Purchase of Units 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                       )  Essential Information
                                                        )  Trust Operating Expenses
50.  Trustee's lien                                     )  Trust Operating Expenses
                                                        )  Distributions 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            )  Trust Operating Expenses
          respect to selection or elimination           )
          of underlying securities                      )
                                                        )  Redemption
</TABLE>

<PAGE>

<TABLE>
<C>  <S>  <C>                                          <C> <C>
                                                        )  Removal of Securities 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
                                                        )  Removal of Securities
     (d)  Fundamental policy not otherwise covered      )  *
53.  Tax status of trust                                )  Tax Status
 
          VIII. FINANCIAL AND STATISTICAL INFORMATION
54.  Trust's securities during last ten years           )  *
55.                                                     )
56.  Certain information regarding                      )  *
     periodic payment certificate                       )
57.                                                     )
58.                                                     )
</TABLE>
 
- ---------
 
* Inapplicable, omitted, answer negative or not required.


<PAGE>
                ------------------------------------------------
 

                 PRELIMINARY PROSPECTUS DATED APRIL 2, 1998

                ------------------------------------------------
 
                           NUVEEN UNIT TRUST--SERIES 12
- --------------------------------------------------------------------------------
 
                                                       (A UNIT INVESTMENT TRUST)
- --------------------------------------------------------------------------------
 
The attached Prospectus is hereby used as a preliminary Prospectus  for the 
above-stated Series.  Information with  respect to the actual trust 
including, pricing,  the  number  of  Units,  dates  and  summary information 
regarding the characteristics of securities to be deposited in this Series 
is not now available. Accordingly  the  information contained  herein  should 
be  considered  as  being  included  for informational purposes only.

A  REGISTRATION STATEMENT RELATING  TO THE UNITS  OF THIS SERIES  HAS BEEN FILED
WITH THE SECURITIES AND  EXCHANGE COMMISSION BUT HAS  NOT YET BECOME  EFFECTIVE.
INFORMATION  CONTAINED HEREIN IS SUBJECT TO  COMPLETION OR AMENDMENT. SUCH UNITS
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 THE UNITS IN ANY STATE IN  WHICH SUCH OFFER, SOLICITATION OR SALE WOULD
BE UNLAWFUL PRIOR TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS  OF
ANY SUCH STATE.



<PAGE>
 

<TABLE>
<S>                                              <C>
NUVEEN                                           Nuveen-Rittenhouse Concentrated
Unit Trusts                                      Growth Portfolio,
                                                 Series 1, April 1998
 
                                                 CUSIP -- -DIVIDENDS IN CASH
                                                 CUSIP -- -DIVIDENDS REINVESTED
PROSPECTUS PART A DATED --
</TABLE>


A NUVEEN UNIT TRUST WITH A PORTFOLIO OF BLUE CHIP STOCKS POISED FOR LONG-TERM 
GROWTH BASED ON THEIR QUALITY AND LEADERSHIP POSITION WITHIN THEIR RESPECTIVE 
INDUSTRY.
 
Overview
 
Nuveen -- Rittenhouse Concentrated Growth Portfolio, Series 1, April 1998 
(the "Trust") is a unit investment trust that is scheduled to terminate in 
approximately 26 months consisting of a portfolio of common stocks selected 
by Rittenhouse Financial Services, Inc., a subsidiary of the John Nuveen 
Company.  The portfolio reflects the holdings of the Rittenhouse Concentrated 
Growth Account -- a subset of the Rittenhouse Standard Portfolio. Only those 
companies that meet the stock selection guidelines of: A ratings from both 
Standard & Poor's and Value Line; market capitalization of $10 billion or 
greater; and the highest earnings outlook are included in the Trust.  The 
Trust seeks capital appreciation from a focused portfolio of established 
stocks selected for their proven quality and earnings potential.

THIS PART A PROSPECTUS MAY NOT BE DISTRIBUTED UNLESS ACCOMPANIED BY THE
NUVEEN-RITTENHOUSE CONCENTRATED GROWTH PORTFOLIO PROSPECTUS -- PART B WHICH IS
DATED ______________, 1998. PART B OF THIS PROSPECTUS IS ATTACHED.

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 FDIC OR
ANY OTHER FEDERAL 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 NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
<TABLE>
<S>                                                   <C>
 Contents
  1 OVERVIEW                                          6 INVESTING IN THE TRUST
  2 TRUST SUMMARY AND FINANCIAL HIGHLIGHTS            6 Sales Charges
  2 Essential Information                             7 Dealer Concessions
  2 Expense Information                               7 GENERAL INFORMATION
  4 TRUST STRATEGIES                                  7 Optional Features
  4 Investment Objective                              8 Secondary Market for Units
  4 How the Trust Selects Investments                 8 Termination
  5 RISK FACTORS                                      8 Standard & Poor's
  5 SECURITIES SELECTED FOR THE TRUST                 8 The Sponsor
  6 DISTRIBUTIONS                                     9 SCHEDULE OF INVESTMENTS
  6 Income and Capital Distributions                  10 STATEMENT OF CONDITION
                                                      11 REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
</TABLE>

                                      2/98
                                     ------
                                       1

<PAGE>

Nuveen-Rittenhouse Concentrated
Growth Portfolio, Series 1, April 1998


           TRUST SUMMARY AND FINANCIAL HIGHLIGHTS as of --

- --------------------------------------------------------------------------------
                             ESSENTIAL INFORMATION


Initial Date of Deposit:                                                --

Interim Rollover Notification Date:
                                                                        --

Final Rollover Notification Date:
                                                                        --

Interim Special Redemption and Liquidation
Period:                                                                 --

Final Special Redemption and Liquidation
Period:                                                                 --

Second Year Commencement Date:                                          --

Initial Number of Units(1):                                             --

Fractional Undivided Interest per Unit:                                 --


- --------------------------------------------------------------------------------
 
PUBLIC OFFERING PRICE (2)

Aggregate Offering Price of Securities:                                    --

Aggregate Offering Price of Securities per Unit:                           $9.90
  Plus Maximum Sales Charge of 4.5%
    (4.545% of the Net Amount Invested)(3)                                 $0.45
  Less Deferred Sales Charge (3):                                          $0.35
Initial Public Offering Price per Unit:                                   $10.00
 
- ----------------------------------------------------
 
MANDATORY TERMINATION DATE

          --

INDUSTRY DIVERSIFICATION

    HOLDINGS SUMMARY

Average Market Capitalization
Average Beta
Average Annual Revenues
Total Shareholder Positions
Every holding is included in the S&P 500 Index



- --------------------------------------------------------------------------------
                              EXPENSE INFORMATION

SALES CHARGES (MAXIMUM TOTAL 4.50%) (4)
 
<TABLE>
<CAPTION>
                                                         AMOUNT PER
                                                       $1000 INVESTED
                                                     (AS OF THE INITIAL
                                                      DATE OF DEPOSIT)
                                                     ------------------
<S>                                       <C>        <C>
Maximum Initial Sales Charge Imposed on
 Purchases (as a % of Initial Public
 Offering Price)(4):....................      1.00%        $10.00
Deferred Sales Charge During First Year
  Deferred Period (as a % of Initial
  Public Offering Price)(4)(5):.........      1.75%        $17.50
Deferred Sales Charge During Second Year
  Deferred Period (as a % of Initial
  Public Offering Price)(4)(5):.........      1.75%        $17.50
Total Deferred Sales Charge (as a % of
  Initial Public Offering
  Price)(4)(5):.........................      3.50%        $35.00
Maximum Total Sales Charge(4)(5):.......      4.50%        $45.00
Maximum Sales Charge on Reinvested
  Dividends (as a % of Initial Public
  Offering Price)(4)(5):................      3.50%        $35.00
</TABLE>
 
- ----------------------------------------------------
 
ESTIMATED ANNUAL OPERATING EXPENSES
(PER UNIT) (6)
- ----------------------------------------------
Trustee's Fee:                                                           $   --
Organizational and
  Offering Expenses:                                                     $   --
Total Annual Expenses:                                                   $   --


<PAGE>
- --------------------------------------------------------------------------------

Notes to Performance Information and Expense Information:

(1) As of the close of business on the Initial Date of Deposit, the number of
    Units of the Trust may be adjusted so that the Public Offering Price per
    Unit will equal approximately $10.00. Thereupon, to the extent of any such
    adjustment, the fractional undivided interest per Unit will increase or
    decrease accordingly, from the amounts indicated above.
 
(2) Each Security listed on a national securities exchange or the NASDAQ
    National Market System is valued at the last closing sale price, or if no
    such price exists or if the Security is not so listed, at the closing ask
    price thereof.
 

(3) The maximum sales charge consists of an initial sales charge and a deferred
    sales charge. The initial sales charge represents an amount equal to the
    difference between the Maximum Total Sales Charge for the Trust of 4.50% of
    the Public Offering Price and the maximum remaining deferred sales charge
    (initially $0.35 per Unit). Unitholders will also be assessed a deferred
    sales charge of $0.0175 per Unit, payable on the last business day of each
    month, over the period commencing ------- through ----- (the "First Year
    Deferred Period") and again over the period commencing ----- through -----
    (the "Second Year Deferred Period").  Unitholders who elect to roll their
    Units into a new series of the Trust or a trust with a similar investment
    strategy during the Interim Special Redemption and Liquidation Period
    (as described in "Special Redemption, Liquidation and Investment in a New
    Trust") or Unitholders who sell or redeem their Units at or before the
    Second Year Commencement Date will not be assessed a deferred sales charge
    for the Second Year Deferred Period.  Subsequent to the Initial Date of
    Deposit, the amount of the initial sales charge will vary with changes in
    the aggregate value of the Securities in the Trust. Deferred sales charge
    payments will be paid from funds in the Capital Account, if sufficient, or
    from the periodic sale of Securities. Any applicable uncollected deferred
    sales charge amounts remaining when a Unitholder sells or redeems their
    Units will be deducted from the sales or redemption proceeds. See "Investing
    in the Trust-Sales Charges," below and "Public Offering Price" in Part B of
    this Prospectus for additional information. On the Initial Date of Deposit
    there will be no accumulated dividends in the Income Account. Anyone
    ordering Units after such date will pay a pro rata share of any accumulated
    dividends in such Income Account.  The Public Offering Price as shown
    reflects the value of the Securities at the opening of business on the
    Initial Date of Deposit and establishes the original proportionate
    relationship amongst the individual Securities. No sales to investors will
    be executed at this price. Additional Securities may be deposited during
    the day of the Initial Date of Deposit. See "Public Offering Price" in
    Part B of this Prospectus.


(4) The Maximum Initial Sales Charge (as a percentage of the Initial Public
    Offering Price) is the difference between the Maximum Total Sales Charge of
    4.50% and the maximum remaining deferred sales charge (initially $0.35 per
    Unit) and would exceed 1% if the Public Offering Price exceeds $10.00 per
    Unit. The actual deferred sales charge is $0.0175 per Unit per month,
    irrespective of the purchase or redemption price, deducted on such dates set
    forth in "Investing in the Trust." Except as noted in "Investing in the
    Trust" or "Redemption" in Part B of this Prospectus, if a Unitholder sells
    or redeems Units before all of these deductions have been made, the balance
    of the deferred sales charge payments remaining will be deducted from the
    sales or redemption proceeds. If the Public Offering Price exceeds $10.00
    per Unit, the deferred portion of the sales charge will be less than 3.50%;
    if the Public Offering Price is less than $10.00 per Unit, the deferred
    portion of the sales charge will be greater than 3.50%. Units purchased
    subsequent to the initial deferred sales charge payment will be subject to
    the initial sales charge and that portion of the deferred sales charge
    payments not yet collected or accrued.
 
(5) Unitholders who elect to roll their Units into a new series of the Trust or
    a trust with a similar investment strategy during the Interim Special
    Redemption and Liquidation Period (as described under "Special Redemption,
    Liquidation and Investment in a New Trust") or Unitholders who sell or
    redeem their Units at or before the Second Year Commencement Date will not
    be assessed a deferred sales charge for the Second Year Deferred Period.
 
(6) The Trust (and therefore Unitholders) will bear all or a portion of its
    organizational and offering costs (but not the expenses incurred in the
    printing of preliminary and final prospectuses, nor the expenses incurred in
    the preparation and printing of brochures and other advertising materials or
    any other selling expenses), as is common for mutual funds. See "Trust
    Operating Expenses" in Part B of this Prospectus and "Statement of
    Condition." Historically, the sponsors of unit investment trusts have paid
    all of the costs of establishing such trusts.

                                     ------
                                       3
<PAGE>
Trust Strategies

INVESTMENT OBJECTIVE

The objective of the Trust is to provide capital appreciation from a focused 
portfolio of established stocks selected for their proven quality and 
earnings potential.  There is no assurance that the Trust will achieve its 
investment objective.

INVESTMENT PHILOSOPHY

The Trust is a non-managed investment vehicle which employs a buy and hold 
investment strategy. The Trust plans to hold, for approximately 26 months, 
certain common stocks selected by Rittenhouse. At the end of the 26 month 
period, the portfolio will be liquidated. The Sponsor intends to create a 
separate series of the Trust approximately 13 months after the Initial Date 
of Deposit and also in conjunction with the termination of the Trust 
(approximately 26 months after the Initial Date of Deposit). Investors may 
reinvest in one of the new portfolios at a reduced sales charge, if 
available. Each portfolio is designed to be part of a longer term strategy 
and the Sponsor believes that more consistent results are likely if the 
strategy is followed for at least 3-5 years. The Trust consists of a 
portfolio of blue chip stocks poised for long-term growth based on their 
quality and leadership position within their respective industry. In order to 
create additional Units, the Sponsor expects to deposit additional Securities 
in the Trust or cash (including a letter of credit) with instructions to 
purchase additional Securities after the Initial Date of Deposit. Such 
deposit of Securities will be done in a manner that will allow the original 
proportionate relationship among the Securities to be maintained as closely 
as practicable.


INVESTOR SUITABILITY
 
The Trust is a suitable investment for investors:
 
- - Seeking to own an investment ins stocks of established, blue chip companies 
  to further enhance the growth potential of their portfolio;
 
- - Seeking a complement to other investments in the growth segment of their 
  portfolio;
 
The Trust is not a suitable investment if:
 
- - You are unwilling to assume the risks inherent in investing in common stocks
  over a relatively short time horizon.
 
HOW THE TRUST SELECTS INVESTMENTS
 

The Securities included in the Trust's portfolio were selected by 
Rittenhouse.  Rittenhouse's disciplined stock selection method carefully 
screens approximately 10,000 U.S. exchange-listed stocks for quality, 
liquidity, and strong potential for sustained growth. This methodology 
determines the 25 to 35 blue chip companies that make up the Rittenhouse 
Standard Portfolio, which is the basis for the Trust's portfolio (the 
"Concentrated Growth Portfolio").  To establish the Concentrated Growth 
Portfolio, Rittenhouse screens stocks in its Standard Portfolio at an even 
higher level, using the quality characteristics described below. The 
Concentrated Growth Portfolio concentrates on a small number of companies and 
industries to further increase the potential for growth as compared to 
Rittenhouse's Standard Portfolio.  To select the Securities for the 
Concentrated Growth Portfolio from the Rittenhouse Standard Portfolio, a 
three step process is initiated.  As an initial step, only companies with 
market capitalizations equal to or in excess of $10 billion were eligible for 
inclusion in the Trust. The second step selected only those companies ranked 
A by Standard & Poor's Earnings and Dividend Rankings for Common Stocks and 
Value Line were selected for the Trust.  As a final step, Rittenhouse selects 
those companies that Rittenhouse believes have the highest earnings outlook.

     The Concentrated Growth Portfolio reflects the holdings of the 
Rittenhouse Concentrated Growth Account on _________, 1998.  The Securities 
selected are issued by companies that are typically global leaders in their 
industries and that Rittenhouse believes have the potential for predictable 
earnings and dividend growth during both up and down economic cycles. Their 
historical strength and stability through strong and weak markets has made 
these stocks less volatile than stocks of smaller companies. To determine 
growth potential, the Trust calls on the highly respected RITTENHOUSE 
INVESTMENT COMMITTEE.  With 7 members averaging 30 years of experience, the 
committee's ongoing analysis helps to select what they believe are 
high-caliber companies for the trust. A description of the Securities 
included in the Trust is set forth below under "Securities Selected for the 
Trust" and "Schedule of Investments."

 
                                     ------
                                       4
<PAGE>
Risk Factors
 
An investment in Units of the Trust should be made with an understanding of the
risks that an investment in common stocks may entail, including the risk that
the financial condition of the issuers of the Securities or the general
condition of the common stock market may worsen and the value of the Securities
and therefore the value of the Units may decline. The past market and earnings
performance of the Securities in the Trust are not predictive of their future
performance. Common stocks are especially susceptible to general stock market
movements and to volatile increases and decreases of value as market confidence
in and perceptions of the issuers change. These perceptions are based on
unpredictable factors including expectations regarding government, economic,
monetary and fiscal policies, inflation and interest rates, economic expansion
or contraction, and global or regional political, economic or banking crises.
The Trust's portfolio is not managed and Securities will not be sold by the
Trust regardless of market fluctuations, although Securities may be sold under
certain limited circumstances. Common stocks do not represent an obligation of
the issuer and, therefore, do not offer any assurance of income or provide the
same degree of protection of capital as do debt securities.
 
The value of common stocks is subject to market fluctuations for as long as the
common stocks remain outstanding, and thus the value of the Securities in the
Portfolio may be expected to fluctuate over the life of the Trust to values
higher or lower than those prevailing on the Initial Date of Deposit. Holders of
common stocks incur more risk than holders of preferred stocks and debt
obligations because common stockholders, as owners of the entity, have generally
inferior rights to receive payments from the issuer in comparison with the
rights of creditors of, or holders of debt obligations or preferred stocks
issued by, the issuer. There is no guarantee that the Trust will achieve its
objective.
 
See "Risk Factors" in Part B of this Prospectus for an additional discussion of
potential risks.
 
Securities Selected for
the Trust


                                     ------
                                       5
<PAGE>


Distributions

INCOME AND CAPITAL DISTRIBUTIONS

Cash dividends received by the Trust will be paid each June 30 and December 31
("Income Distribution Dates") to Unitholders of record each June 15 and December
15 ("Income Record Dates"), respectively. Rollover Unitholders (as defined
below) will generally receive upon liquidation their pro rata portion of the
Income Account as Units of the New Trust (as defined below). Distributions of
funds in the Capital Account, if any, will be made as part of the final
liquidation distribution, if applicable, and in certain circumstances, earlier.
Any distribution of income and/or capital will be net of expenses of the Trust.
Additionally, upon termination of the Trust, the Trustee will distribute, upon
surrender of Units, to each remaining Unitholder (other than a Rollover
Unitholder) his pro rata share of the Trust's assets, less expenses, in the
manner set forth under "Distributions To Unitholders" in Part B of this
Prospectus. For distributions to Rollover Unitholders, see "Special Redemption,
Liquidation and Investment in a New Trust." Any Unitholder may elect to have
each distribution of income or capital on his Units, other than the final
liquidating distribution or interim liquidation distribution, if applicable,
automatically reinvested in additional Units of the Trust subject only to
applicable remaining deferred sales charge payments. See "Distributions To
Unitholders" in Part B of this Prospectus.
 
Investing in the Trust
 
SALES CHARGES
 

The maximum sales charge of 4.50% of the public offering price consists of an
initial sales charge equal to the difference between the maximum sales charge of
4.50% and the maximum remaining deferred sales charge, initially $0.35 per Unit.
Unitholders will be assessed a deferred sales charge of $0.0175 per Unit,
payable on the last business day of each month, over the period commencing 
___________ through ______________ (the "First Year Deferred Period") and again
over the period commencing _____________ through ________________ (the "Second
Year Deferred Period"). Units purchased subsequent to the initial deferred sales
charge payment will be subject to the initial sales charge and the remaining
deferred sales charge payments not yet collected. Unitholders that purchase more
than 5,000 Units are entitled to reduced sales charges. In addition, certain
classes of investors are entitled to purchase Units at reduced sales charges.
See "Public Offering Price" in Part B of this Prospectus. Sales charges for
larger single transactions (including deferred sales charge) are as follows:

- ----------------------------------------------
 
SALES CHARGES
 

<TABLE>
<CAPTION>
                               First Year   Second Year     Total     Percent***
                    Initial     Deferred     Deferred      Maximum      of Net
                     Sales        Sales        Sales        Sales       Amount
Number of Units*   Charge**      Charge       Charge      Charge++     Invested
- ----------------  -----------  -----------  -----------  -----------  -----------
<S>               <C>          <C>          <C>          <C>          <C>
Less than
 5,000..........       1.00%    $   0.175    $   0.175        4.50%       4.545%
5,000 to
 9,999..........       0.75%    $   0.175    $   0.175        4.25%       4.293%
10,000 to
 24,999.........       0.50%    $   0.175    $   0.175        4.00%       4.040%
25,000 to
 49,999.........       0.25%    $   0.175    $   0.175        3.75%       3.788%
50,000 to
 99,999.........       0.00%    $   0.175    $   0.175        3.50%       3.535%
100,000 or
 more...........       0.00%    $   0.175    $   0.175        2.75%+      2.778%
Wrap Accounts...       0.00%    $   0.175    $   0.175        2.40%+      2.424%
Rollover (per
 Unit)..........       0.00%    $   0.175    $   0.175    $    0.35       3.535%
</TABLE>

 
*Breakpoint sales charges are computed both on a dollar basis and on the basis
of the number of Units purchased, using the equivalent of 5,000 Units to
$50,000, 10,000 Units to $100,000 etc., and will be applied on that basis which
is more favorable to the purchaser.
 
**Based upon a $10.00 Public Offering Price. This will fluctuate based upon the
Public Offering Price of the Units at the time of purchase and the date of
purchase.
 
***Percent of Net Amount Invested is based on the price as of the Initial Date
of Deposit. To the extent Units are priced differently, the Percent of Net
Amount Invested will be affected.
 
                                     ------
                                       6
<PAGE>
+All Units of the Trust will be subject to the applicable deferred sales charge
per Unit regardless of sale charge discounts. Investors who, as a result of sale
charge discounts, are eligible to purchase Units subject to a maximum total
sales charge less than the applicable maximum deferred sales charge will be
credited the difference between these amounts at the time of purchase.
 

++The Public Offering Price per Unit is rounded to the nearest cent and
accordingly the actual sales charge paid by an investor may be slightly greater
or less than the amount reflected.

 
UNITHOLDERS WHO ELECT TO ROLL THEIR UNITS INTO A NEW SERIES OF THE TRUST OR A
TRUST WITH A SIMILAR INVESTMENT STRATEGY DURING THE INTERIM SPECIAL REDEMPTION
AND LIQUIDATION PERIOD (AS DESCRIBED UNDER "SPECIAL REDEMPTION, LIQUIDATION AND
INVESTMENT IN A NEW TRUST") OR UNITHOLDERS WHO SELL OR REDEEM THEIR UNITS AT OR
BEFORE THE SECOND YEAR COMMENCEMENT DATE WILL NOT BE ASSESSED THE DEFERRED SALES
CHARGE OF $0.175 PER UNIT FOR THE SECOND YEAR DEFERRED PERIOD AND ACCORDINGLY
THE SALES CHARGES PAID BY THOSE UNITHOLDERS SHALL BE LESS THAN THE TOTAL MAXIMUM
SALES CHARGE INDICATED ABOVE.
 
DEALER CONCESSIONS
 
The Sponsor plans to allow a discount to dealer firms in connection with the
distribution of Units. The discounts, based on number of Units sold, are
provided below. Dealer firms are entitled to receive an additional concession in
accordance with the schedule provided below for Units that are continued to be
held after the Second Year Commencement Date by Unitholders that purchased such
Units through the respective Dealer firm:
- ----------------------------------------------
 
DEALER CONCESSIONS
 
<TABLE>
<CAPTION>
                                                    ADDITIONAL CONCESSION
                                                    FOR UNITS HELD AFTER
                                                         SECOND YEAR
                                   % DISCOUNT PER   COMMENCEMENT DATE PER
        NUMBER OF UNITS*                UNIT                UNIT
- ---------------------------------  ---------------  ---------------------
<S>                                <C>              <C>
Less than 5,000..................          2.10%          $    0.11
5,000 to 9,999...................          1.90                0.11
10,000 to 24,999.................          1.65                0.11
25,000 to 49,999.................          1.40                0.11
50,000 to 99,999.................          1.15                0.11
100,000 or more..................          0.50                0.11
Rollover.........................          1.10                0.11
Wrap Accounts....................          0.00                0.00
</TABLE>
 
*Breakpoint sales charges are computed both on a dollar basis and on the basis
of the number of Units purchased, using the equivalent of 5,000 Units to
$50,000, 10,000 Units to $100,000 etc., and will be applied on that basis which
is more favorable to the purchaser.
 
General Information
 
OPTIONAL FEATURES
 
REDEMPTIONS
Units may be redeemed on any business day at their current market value. Units
tendered for redemption prior to such time as the entire deferred sales charge
on such Units has been collected will be assessed the remaining deferred sales
charge at the time of redemption. However, Unitholders who elect to roll their
Units into a new series of the Trust or a trust with a similar investment
strategy during the Interim Special Redemption and Liquidation Period or
Unitholders who sell or redeem their Units at or before the Second Year
Commencement Date will not be assessed a deferred sales charge for the Second
Year Deferred Period and accordingly are only responsible for the remaining
deferred sales charges for the First Year Deferred Period. See "Redemption" in
Part B of this Prospectus.
 
LETTER OF INTENT (LOI)
Investors may use a Letter of Intent to get reduced sales charges on purchases
made over a 13-month period (and to take advantage of dollar cost averaging).
Rollover Unitholders will not be permitted to apply New Trust purchases to
satisfy the LOI amount. The minimum LOI investment is $50,000. See "Public
Offering Price" in Part B of this Prospectus.
 
SPECIAL REDEMPTION, LIQUIDATION AND INVESTMENT IN A NEW TRUST
The Sponsor intends to create separate series of the Trust (the "New Trusts")
approximately 13 months after the Initial Date of Deposit of the Trust and also
in conjunction with the termination of the Trust (approximately 26 months after
the Initial Date of Deposit). The portfolio of the New Trusts will contain
common stocks that are selected by the Sponsor using the same criteria and
investment philosophy employed by this series of the Trust. Unitholders may
elect to have their proceeds reinvested into a New Trust, if available,
approximately 13 months or 26 months after the Initial Date of Deposit by
notifying the Trustee of this election by the Interim Rollover Notification Date
("Interim Rollover") or the Final Rollover Notification Date ("Final Rollover"),
respectively. Such a Unitholder's Units will be redeemed in-kind, the
distributed Securities sold, and the proceeds invested in a New Trust or a trust
with a similar investment strategy at a reduced sales charge, provided such New
Trust or other similar trust is offered and Units are available. Cash not
invested in a New Trust or other eligible trust will be distributed.
(Unitholders electing to have their proceeds reinvested during the Interim
Rollover shall be referred to herein as "Interim Rollover Unitholders;" those
electing to do so during the Final Rollover shall be referred to herein as
"Final Rollover Unitholders" and each shall collectively be referred to as
"Rollover Unitholders.") Rollover Unitholders therefore will generally not
receive an interim or final liquidation distribution (other than cash not
invested in a New Trust or other eligible trust), but will receive Units in a
New Trust or other eligible trust. On August 5, 1997, legislation (the "Act")
was enacted that reduces the maximum stated marginal tax rate for certain
capital gains for investments held for more than 18 months to 20% (10% in the
case of certain taxpayers in the lowest tax bracket). Generally, Final Rollover
Unitholders would qualify for such tax treatment whereas Interim Rollover
Unitholders would be subject to a
 
                                     ------
                                       7
<PAGE>
maximum stated marginal tax rate of 28% on long-term capital gains resulting
from ownership of Units. See "Tax Status" in Part B of this Prospectus.
Potential investors should consult their tax advisors regarding the potential
effect of the Act on their investment in Units. In addition, it should be noted
that legislative proposals are introduced from time to time that affect tax
rates and could affect relative differences at which ordinary income and capital
gains are taxed. See "Tax Status" in Part B of this Prospectus. This exchange
option may be modified, terminated or suspended. See "Special Redemption,
Liquidation and Investment in a New Trust" in Part B of this Prospectus.
 
REINVESTMENT
Distributions from the Trust can be reinvested with no sales charge into Nuveen
mutual or money market funds. Also, income and certain capital distributions
from the Trust can be reinvested at a reduced sales charge into additional Units
of the Trust. See "Distributions to Unitholders" and "Accumulation Plan" in Part
B of this Prospectus. For more information about Nuveen investment products,
obtain a prospectus from your financial adviser.
 
SECONDARY MARKET FOR UNITS
Although not obligated to do so, the Sponsor may maintain a market for Units and
offer to repurchase the Units at prices based on the aggregate value of the
Securities, plus or minus cash, if any, in the Capital and Income Accounts of
the Trust plus a sales charge. If a secondary market is not maintained, a
Unitholder may still redeem his Units through the Trustee. See "Redemption" in
Part B of this Prospectus. Any applicable deferred sales charge remaining on
Units at the time of their sale or redemption will be collected at that time.
 
TERMINATION
Commencing on the Mandatory Termination Date, the Equity Securities will begin
to be sold as prescribed by the Sponsor. The Trustee will provide written notice
of the termination to Unitholders which will specify when certificates may be
surrendered. Unitholders not electing the "Rollover Option" will receive a cash
distribution within a reasonable time after the Trust's termination. See
"Distributions to Unitholders" and "Other Information -- Termination of
Indenture" in Part B of this Prospectus.
 
RITTENHOUSE
Rittenhouse, a wholly owned subsidiary of the John Nuveen Company, is an 
institutional investment management firm based in Radnor, Pennsylvania with 
approximately $10 billion in assets under management.  The firm is a proven 
equity manager with _____ years of experience serving high-net worth 
individuals and some of the country's leading institutions.


THE SPONSOR
Since our founding in 1898, John Nuveen & Co. Incorporated has been synonymous
with investments that withstand the test of time. Today, we offer a range of
equity and fixed-income unit trusts designed to suit the unique circumstances
and financial planning needs of mature investors. More than 1.3 million
investors have trusted Nuveen to help them maintain the life-style they
currently enjoy.  Nuveen offers 100 years of investment innovation experience.
   
The prospectus describes in detail the investment objectives, policies and risks
of this unit trust. We invite you to discuss the contents with your financial
adviser, or you may call us at 800-257-8787 for additional information.
 
                                     ------
                                       8
<PAGE>
- --------------------------------------------------------------------------------
 

    NUVEEN-RITTENHOUSE CONCENTRATED GROWTH PORTFOLIO, SERIES 1, APRIL 1998
                        (Nuveen Unit Trusts, Series 12)
    Schedule of Investments at the Initial Date of Deposit, _______________


<TABLE>
<CAPTION>
                                                                                                            PERCENTAGE OF
                                                                                                              AGGREGATE
  NUMBER OF                          NAME OF ISSUER OF SECURITIES             STP QUALITY      VALUE LINE     OFFERING
   SHARES                                 (TICKER SYMBOL)(1)                     RANKING        RANKING        PRICE
<C>            <C>        <S>                                                 <C>              <C>          <C>
- ---------------------------------------------------------------------------------------------------------------------------














- -------------                                                                                                       ---
      2,420                                                                                                         100%
- -------------                                                                                                       ---
- -------------                                                                                                       ---
 
<CAPTION>
 
                 MARKET       COST OF
  NUMBER OF    VALUE PER   SECURITIES TO
   SHARES        SHARE       TRUST(2)
<C>            <C>         <C>
- -------------
               $            $     
                 












- -------------              -------------

- -------------              -------------
- -------------              -------------
</TABLE>

 
- -------------
 

(1)  All Securities are represented by regular way contracts to purchase such
     Securities for the performance of which an irrevocable letter of credit has
     been deposited with the Trustee. The contracts to purchase the Securities
     were entered into by the Sponsor on ______________________.

 

(2)  The cost of the Securities to the Trust represents the aggregate underlying
     value with respect to the Securities acquired (generally determined by the
     last sale prices of the listed Securities on the business day preceding the
     Initial Date of Deposit). The valuation of the Securities has been
     determined by the Trustee. The aggregate underlying value of the Securities
     on the Initial Date of Deposit was $______. Cost and gain or (loss) to
     Sponsor relating to the Securities sold to the Trust were $______ and $___,
     respectively.


                                     ------
                                       9
<PAGE>
- --------------------------------------------------------------------------------
 

    NUVEEN-RITTENHOUSE CONCENTRATED GROWTH PORTFOLIO, SERIES 1, APRIL 1998
                        (Nuveen Unit Trusts, Series 12)
    Statement of Condition at the Initial Date of Deposit, ________________


<TABLE>
<S>                                                                              <C>
TRUST PROPERTY
Investment in Equity Securities represented by purchase contracts (1)(2).......  $  _______
Organizational and offering costs(3)...........................................     _______
                                                                                 ----------
             Total.............................................................  $  _______
                                                                                 ----------
                                                                                 ----------
 
LIABILITIES AND INTEREST OF UNITHOLDERS
LIABILITIES:
    Deferred sales charge(4)...................................................  $  _______
    Accrued organizational and offering costs(3)...............................     _______
                                                                                 ----------
             Total.............................................................  $  _______
                                                                                 ----------
                                                                                 ----------
INTEREST OF UNITHOLDERS:
    Units of fractional undivided interest outstanding (_______)
    Cost to investors(5).......................................................  $  _______
        Less: Gross underwriting commission(6).................................     _______
                                                                                 ----------
    Net amount applicable to investors.........................................  $  _______
                                                                                 ----------
             Total.............................................................  $  _______
                                                                                 ----------
                                                                                 ----------
</TABLE>

 
- ------------
 

(1)  Aggregate cost of Securities listed under "SCHEDULE OF INVESTMENTS" is
    based on their aggregate underlying value.

 
(2)  An irrevocable letter of credit has been deposited with the Trustee as
    collateral, which is sufficient to cover the monies necessary for the
    purchase of the Securities pursuant to contracts for the purchase of such
    Securities.
 

(3)  The Trust (and therefore Unitholders) will bear all or a portion of its
    estimated organizational and offering costs. Those costs attributable to
    licensing fees paid to Standard & Poor's will be expensed in the year
    incurred, other organization costs will be amortized over the first 18
    months of the Trust. The estimated organizational and offering costs are
    based upon an estimate that 2,000,000 Units of the Trust will be issued. To
    the extent the number of Units issued is larger or smaller, the estimate
    will vary.

 

(4)  Represents the amount of mandatory distributions from the Trust ($0.175 per
    Unit), payable to the Sponsor in ten equal monthly installments of $0.0175
    per Unit beginning on _____________, and on the last business day of each
    month thereafter through _______________. Unitholders who hold their Units
    after the Second Year Commencement Date will be assessed an additional
    deferred sales charge ($0.175 per Unit) for the Second Year Deferred Period.
    Such deferred charge is not represented in the amount reflected.

 
(5)  Aggregate Public Offering Price computed as set forth under "PUBLIC
    OFFERING PRICE" in Part B of this Prospectus.
 
(6)  The gross underwriting commission of 4.50% of the Public Offering Price
    includes both an up-front and a deferred sales charge and has been
    calculated on the assumption that the Units sold are not subject to a
    reduction of sales charge for quantity purchases and that all Units are held
    after the Second Year Commencement Date. In single transactions involving
    5,000 Units or more, the sales charge is reduced. In addition, Unitholders
    who elect to roll their Units into a new series of the Trust or a trust with
    a similar investment strategy during the Interim Special Redemption and
    Liquidation Period or Unitholders who sell or redeem their Units at or
    before the Second Year Commencement Date will not be assessed a deferred
    sales charge for the Second Year Deferred Period and, accordingly, are only
    responsible for the remaining deferred sales charges for the First Year
    Deferred Period. (See "PUBLIC OFFERING PRICE" in Part B of this Prospectus.)
 
                                     ------
                                       10
<PAGE>
Report of Independent Public Accountants
 

TO THE BOARD OF DIRECTORS OF JOHN NUVEEN & CO. INCORPORATED AND UNITHOLDERS OF
NUVEEN UNIT TRUSTS, SERIES 12:

 

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 
Nuveen Unit Trusts, Series 12 (Nuveen--Rittenhouse Concentrated Growth 
Portfolio, Series 1, April 1998), as of __________________. 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 (2) 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 Nuveen Unit Trusts, Series 12 (Nuveen--Rittenhouse 
Concentrated Growth Portfolio, Series 1, April 1998), as of _______________, 
in conformity with generally accepted accounting principles.


                                                   ARTHUR ANDERSEN LLP


Chicago, Illinois
_________________

                                     ------
                                       11
<PAGE>

                               NUVEEN UNIT TRUSTS
                NUVEEN -- CONCENTRATED GROWTH PORTFOLIO PROSPECTUS --
                                     PART B
                                (GENERAL TERMS)
                               _______________, 1998

    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.
 

    CURRENTLY OFFERED AT PUBLIC OFFERING PRICE PLUS ACCUMULATED DIVIDENDS
ACCRUED TO THE DATE OF SETTLEMENT. MINIMUM PURCHASE--EITHER $3,000 OR 300 UNITS
($1,000 OR 100 UNITS FOR TRADITIONAL OR ROTH IRA PURCHASES AND $500 OR 50 UNITS
FOR EDUCATION IRA PURCHASES), WHICHEVER IS LESS.


    THIS NUVEEN 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 
securities and, thereafter, will consist of a portfolio of blue chip stocks 
poised for long-term growth based on their quality and leadership position 
within their respective industry (see "SCHEDULE OF INVESTMENTS" appearing in 
Part A of this Prospectus and "SUMMARY OF PORTFOLIOS"). 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. For a discussion of 
the Sponsor's obligations in the event of a failure of any contract for the 
purchase of any of the Securities and its limited right to substitute other 
securities to replace any failed contract, see "COMPOSITION OF TRUSTS."
 
    THE OBJECTIVE of the Trust is to provide capital appreciation from a 
focused portfolio of established stocks selected for their proven quality and 
earnings potential.

    DIVIDEND AND CAPITAL DISTRIBUTIONS.  Cash dividends received by the Trust
will be paid on those dates set forth under "DISTRIBUTIONS" in Part A of the
Prospectus. Distributions of funds in the Capital Account, if any, will be made
as part of the final liquidation distribution, if applicable, and in certain
circumstances, earlier.
 

    THE PUBLIC OFFERING PRICE per Unit of each Trust during the initial offering
period is generally equal to a pro rata share of the aggregate underlying value
of the Securities in such Trust's portfolio (generally determined by the closing
sale prices of the listed Securities and the ask prices of over-the-counter
traded Securities) plus or minus cash, if any, in the Income and Capital
Accounts of the Trust, plus a sales charge as set forth in Part A of the
Prospectus and is rounded to the nearest cent. The Secondary Market Public
Offering Price per Unit for each Trust will generally be equal to a pro rata
share of the aggregate underlying value of the Securities in such Trust
(generally determined by the closing sale prices of the listed Securities and
the bid prices of over-the-counter traded Securities) plus the sales charges as
set forth in Part A of the Prospectus. A pro rata share of accumulated
dividends, if any, in the Income Account 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 the number of Units set forth in
Part A of this Prospectus.

 
    A UNITHOLDER MAY REDEEM UNITS at the office of the Trustee at prices based
upon the aggregate underlying value of the Securities (generally determined by
the closing sale prices of listed Securities and the bid prices of
over-the-counter traded Securities). The price received upon redemption may be
more or less than the amount paid by Unitholders, depending upon the value of
the Securities on the date of tender for redemption. (See "REDEMPTION.") The
Sponsor, although not required to do so, may make a secondary market for the
Units of the Trusts at prices based upon the aggregate underlying value of the
Securities in the
<PAGE>
respective Trusts (generally determined by the closing sale prices of listed
Securities and the bid prices of over-the-counter traded Securities). Units
subject to a deferred sales charge which are tendered for redemption prior to
such time as the entire deferred sales charge on such Units has been collected
will be assessed the amount of the applicable remaining deferred sales charge at
the time of redemption. (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 possible
deterioration of either the financial condition of the issuers or the general
condition of the stock market (which currently are at historically high levels),
changes in interest rates and economic recession. Volatility in the market price
of the Securities in the Trust changes the value of the Units of such Trust.
Unitholders tendering Units for redemption during periods of market volatility
may receive redemption proceeds which are more or less than they paid for the
Units. The Trusts' portfolios are not managed and Securities will not be sold by
a Trust regardless of market fluctuations, although certain Securities may be
sold under certain limited circumstances. See "RISK FACTORS."
 

                                       2
<PAGE>
                               TABLE OF CONTENTS
 

<TABLE>
<S>                                                                                     <C>
NUVEEN UNIT TRUSTS....................................................................           4
 
OBJECTIVE OF THE TRUSTS...............................................................           5
 
SUMMARY OF PORTFOLIOS.................................................................           5
 
COMPOSITION OF TRUSTS.................................................................           5
 
RISK FACTORS..........................................................................           7
 
PUBLIC OFFERING PRICE.................................................................           8
 
MARKET FOR UNITS......................................................................          10
 
EVALUATION OF SECURITIES AT THE INITIAL DATE OF DEPOSIT...............................          11
 
TAX STATUS............................................................................          11
 
RETIREMENT PLANS......................................................................          15
 
TRUST OPERATING EXPENSES..............................................................          16
 
DISTRIBUTIONS TO UNITHOLDERS..........................................................          16
 
ACCUMULATION PLAN.....................................................................          17
 
REPORTS TO UNITHOLDERS................................................................          18
 
UNIT VALUE AND EVALUATION.............................................................          18
 
DISTRIBUTIONS OF UNITS TO THE PUBLIC..................................................          19
 
OWNERSHIP AND TRANSFER OF UNITS.......................................................          20
 
REPLACEMENT OF LOST, STOLEN OR DESTROYED CERTIFICATES.................................          20
 
REDEMPTION............................................................................          20
 
SPECIAL REDEMPTION, LIQUIDATION AND INVESTMENT IN A NEW TRUST.........................          23
 
PURCHASE OF UNITS BY THE SPONSOR......................................................          24
 
REMOVAL OF SECURITIES FROM THE TRUSTS.................................................          24

INFORMATION ABOUT THE TRUSTEE.........................................................          25
 
LIMITATIONS ON LIABILITIES OF SPONSOR AND TRUSTEE.....................................          25
 
SUCCESSOR TRUSTEES AND SPONSORS.......................................................          25
 
INFORMATION ABOUT THE SPONSOR.........................................................          26
 
OTHER INFORMATION.....................................................................          26
 
LEGAL OPINION.........................................................................          27
 
AUDITORS..............................................................................          27
 
SUPPLEMENTAL INFORMATION..............................................................          27
</TABLE>

 
                                       3
<PAGE>
NUVEEN UNIT TRUSTS
 
    This Nuveen 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 each Trust is set forth in Part A of this Prospectus. The various
Nuveen Unit Trusts are collectively referred to herein as the "TRUSTS." This
Series was created under the laws of the State of New York pursuant to a Trust
Indenture and Agreement dated the Initial 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 common stocks of companies, together with 
funds represented by an irrevocable letter of credit issued by a major 
commercial bank in the amount required for their purchase (or the securities 
themselves) (the "SECURITIES"). See "SCHEDULE OF INVESTMENTS" in Part A of 
this Prospectus, for a description of the Securities deposited in a Trust. 
See also, "SUMMARY OF PORTFOLIOS" and "RISK FACTORS."
 
    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 Securities deposited in 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.
 
    Additional Units of a Trust may be issued from time to time following the
Initial Date of Deposit by depositing in such Trust additional Securities (or
contracts therefore backed by an irrevocable letter of credit or cash) or cash
(including a letter of credit) with instructions to purchase additional
Securities in the Trust. As additional Units are issued by a Trust as a result
of the deposit of additional Securities or cash by the Sponsor, the aggregate
value of the Securities in a Trust will be increased and the fractional
undivided interest in such Trust represented by each Unit will be decreased. The
Sponsor may continue to make additional deposits of Securities, or cash with
instructions to purchase additional Securities, into a Trust following the
Initial Date of Deposit, provided that such additional deposits will be in
amounts which will maintain, within reasonable parameters, the same original
proportionate relationship among the Securities in such Trust established on the
Initial Date of Deposit. Thus, although additional Units will be issued, each
Unit will continue to represent the same proportionate amount of each Security.
To the extent that any Units are redeemed by the Trustee or additional Units are
issued as a result of additional Securities or cash being deposited by the
Sponsor, the fractional undivided interest in a Trust represented by each
unredeemed Unit will decrease or increase accordingly, although the actual
interest in such Trust represented by such fraction will remain unchanged. If
the Sponsor deposits cash, however, existing and new investors may experience a
dilution of their investment and a reduction in their anticipated income because
of fluctuations in the price of the Securities between the time of the cash
deposit and the purchase of the Securities and because the Trust will pay the
associated brokerage fees. To minimize this effect, the Trust will try to
purchase the Securities as close to the evaluation time or as close to the
evaluation price as possible. Units will remain outstanding until redeemed upon
tender to the Trustee by Unitholders, which may include the Sponsor, or until
termination of the Trust Agreement.
 
                                       4
<PAGE>

OBJECTIVE OF THE TRUSTS
 
    The objective of the Trust is to provide capital appreciation from a 
focused portfolio of established stocks selected for their proven quality and 
earnings potential. There is, of course, no guarantee that the Trust's 
objective will be achieved.
 
SUMMARY OF PORTFOLIOS
 
    The Securities included in the Trust and the process by which the 
securities are selected are described in "Trust Strategies," "Securities 
Selected for the Trust" and "Schedule of Investments" in Part A of this 
Prospectus.

COMPOSITION OF TRUSTS
 
    Each Trust initially consists of delivery statements relating to contracts
to purchase Securities (or of such Securities) as are listed under "SCHEDULE OF
INVESTMENTS" in Part A of this Prospectus and, thereafter, of such Securities as
may continue to be held from time to time (including certain securities
deposited in the Trust to create additional Units or in substitution for
Securities not delivered to a Trust.)
 
    LIMITED REPLACEMENT OF CERTAIN SECURITIES.  Neither the Sponsor nor the
Trustee shall be liable in any way for any default, failure or defect in any
Security. In the event of a failure to deliver any Security that has been
purchased for a Trust under a contract, including those Securities purchased on
a when, as and if issued basis ("FAILED SECURITIES"), the Sponsor is authorized
under the Indenture to direct the Trustee to acquire other specified Securities
("REPLACEMENT SECURITIES") 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
may not exceed the amount of funds reserved for the purchase of the Failed
Securities.
 
    If the right of limited substitution described in the preceding paragraph is
not utilized to acquire Replacement Securities in the event of a failed
contract, the Sponsor will refund the sales charge attributable to such Failed
Securities to all Unitholders of the Trust and the Trustee will distribute the
principal attributable to such Failed Securities not more than 120 days after
the date on which the Trustee received a notice from the Sponsor that a
Replacement Security would not be deposited in the Trust. In addition,
Unitholders should be aware that, at the time of receipt of such principal, they
may not be able to reinvest such proceeds in other securities with equivalent
growth potential at a comparable price.
 
    The indenture also authorizes the Sponsor to increase the size of the Trust
and the number of Units thereof by the deposit of additional Securities in the
Trust or cash (including a letter of credit) with instructions to purchase
additional Securities in the Trust and the issuance of a corresponding number of
additional Units. If the Sponsor deposits cash, however, existing and new
investors may experience a dilution of their investment and a reduction in their
anticipated income because of fluctuations in the prices of the Securities
between the time of the cash deposit and the purchase of the Securities and
because the Trust will pay the associated brokerage fees.
 
                                       5
<PAGE>
    SALE OF SECURITIES.  Certain of the Securities may from time to time under
certain circumstances be sold. 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.
 
    LITIGATION.  To the best knowledge of the Sponsor, there is no litigation
pending as of the Initial Date of Deposit in respect of any Securities which
might reasonably be expected to have a material adverse effect on any of the
Trusts. It is possible that after the Initial Date of Deposit, litigation may be
initiated with respect to Securities in any Trust. The Sponsor is unable to
predict whether any such litigation may be instituted, or if instituted, whether
such litigation might have a material adverse effect on the Trusts.


                                       6
<PAGE>

RISK FACTORS
 

    An investment in Units should be made with an understanding of the risks
which an investment in common stocks entails, including the risk that the
financial condition of the issuers of the Securities or the general conditions
of the common stock market may worsen and the value of the Securities and
therefore the value of the Units may decline. Common stocks are especially
susceptible to general stock market movements and to volatile increases and
decreases of value as market confidence in and perceptions of the issuers
change. These perceptions are based on unpredictable factors including
expectations regarding government, economic, monetary and fiscal policies,
inflation and interest rates, economic expansion or contraction, and global or
regional political, economic or banking crises. Shareholders of common stocks
have rights to receive payments from the issuers of those common stocks that are
generally subordinate to those of creditors of, or holders of debt obligations
or preferred stocks of, such issuers. Shareholders of common stocks of the type
held by the Trusts have a right to receive dividends only when and if, and in
the amounts, declared by the issuer's board of directors and have a right to
participate in amounts available for distribution by the issuer only after all
other claims on the issuer have been paid or provided for. Common stocks do not
represent an obligation of the issuer and, therefore, do not offer any assurance
of income or provide the same degree of protection of capital as do debt
securities. The issuance of additional debt securities or preferred stock will
create prior claims for payment of principal, interest and dividends which could
adversely affect the ability and inclination of the issuer to declare or pay
dividends on its common stock or the rights of holders of common stock with
respect to assets of the issuer upon liquidation or bankruptcy. The value of
common stocks is subject to market fluctuations for as long as the common stocks
remain outstanding, and thus the value of the Securities in the Trusts may be
expected to fluctuate over the life of the Trusts to values higher or lower than
those prevailing on the Initial Date of Deposit.

 
    Holders of common stocks incur more risk than holders of preferred stocks
and debt obligations because common stockholders, as owners of the entity, have
generally inferior rights to receive payments from the issuer in comparison with
the rights of creditors of, or holders of debt obligations or preferred stocks
issued by, the issuer. Cumulative preferred stock dividends must be paid before
common stock dividends and any cumulative preferred stock dividend omitted is
added to future dividends payable to the holders of cumulative preferred stock.
Preferred stockholders are also generally entitled to rights on liquidation
which are senior to those of common stockholders.
 
    Unitholders will be unable to dispose of any of the Securities in the Trust,
as such, and will not be able to vote the Securities. As the holder of the
Securities, the Trustee will have the right to vote all of the voting stocks in
a Trust and will vote such stocks in accordance with the instructions of the
Sponsor.
 
    The value of the Securities will fluctuate over the life of a Trust and may
be more or less than the value at the time they were deposited in such Trust.
The Securities may appreciate or depreciate in value (or pay dividends)
depending on the full range of economic and market influences affecting these
securities,
 
                                       7
<PAGE>

including the impact of the Sponsor's purchase and sale of Securities
(especially during the primary offering period of Units of a Trust and during
the Special Redemption and Liquidation Period) and other factors.
 
    Whether or not the Securities are listed on a securities exchange, the
principal trading market for the Securities may be in the over-the-counter
market. As a result, the existence of a liquid trading market for the Securities
may depend on whether dealers will make a market in the Securities. There can be
no assurance that a market will be made for any of the Securities, that any
market for the Securities will be maintained or of the liquidity of the
Securities in any markets made. In addition, the Trusts may be restricted under
the Investment Company Act of 1940 from selling Securities to the Sponsor. The
price at which the Securities may be sold to meet redemptions and the value of
the Trusts will be adversely affected if trading markets for the Securities are
limited or absent.
 
PUBLIC OFFERING PRICE
 

    The Public Offering Price of the Units is based on the aggregate underlying
value of the Securities in the Trust (generally determined by the closing sale
prices of listed Securities and the ask prices of over-the-counter traded
Securities), plus or minus cash, if any, in the Income and Capital Accounts of
the Trust, plus an initial sales charge equal to the difference between the
maximum sales charge of 4.50% of the Public Offering Price per Unit and the
maximum remaining deferred sales charge, initially $0.35 per Unit and is rounded
to the nearest cent. Commencing on those dates set forth under "INVESTING IN THE
TRUST -- SALES CHARGES" in Part A of this Prospectus, a deferred sales charge of
$0.0175 will be assessed per Unit per month. Units purchased subsequent to the
initial deferred sales charge payment will be subject to the initial sales
charge and the remaining deferred sales charge payments not yet collected.
Unitholders who elect to roll their Units into a new series of the Trust or a
trust with a similar investment strategy during the Interim Special Redemption
and Liquidation Period (as described under "SPECIAL REDEMPTION, LIQUIDATION AND
INVESTMENT IN A NEW TRUST" in Part A of the Prospectus) or Unitholders who sell
or redeem their Units at or before the Second Year Commencement Date (as defined
in Part A of the Prospectus) will not be assessed a deferred sales charge for
the Second Year Deferred Period (as defined in Part A of the Prospectus) and
accordingly are only responsible for the remaining deferred sales charges for
the First Year Deferred Period (as defined in Part A of the Prospectus). The
deferred sales charge will be paid from funds in the Capital Account, if
sufficient, or from the periodic sale of Securities. A pro rata share of
accumulated dividends, if any, in the Income Account 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 total maximum sales
charge assessed to Unitholders on a per Unit basis will be 4.50% of the Public
Offering Price (equivalent to 4.545% of the net amount invested). See "UNIT
VALUE AND EVALUATION."

 

    The sales charge applicable to quantity purchases is reduced on a graduated
scale as set forth in Part A of this Prospectus. For purposes of 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 graduated scale provided in Part A of this Prospectus,
based on the amount of intended aggregate purchases (excluding purchases which
are subject only to a deferred sales charge) as expressed in the letter of
intent. For purposes of letter of intent calculations units of equity products
are valued at $10 per unit. 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


                                       8
<PAGE>

escrow by the Trustee pending completion of these purchases. All distributions
on Units held in escrow will be credited to such Unitholders 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.
 

    For "secondary market" sales the Public Offering Price per Unit of each
Trust is determined by adding to the Trustee's determination of the aggregate
value of each Security in the Trust (generally determined by the closing sale
prices of listed Securities and the bid prices of over-the-counter traded
Securities) a sales charge as set forth in Part A of this Prospectus. See "UNIT
VALUE AND EVALUATION." The secondary market sales charge is reduced with respect
to quantity purchases in such amounts set forth in Part A of this Prospectus.

 
    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 total value of the Securities deposited in the Trust during the primary
offering period 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 Securities
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 ("Evaluation Time"). 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.
 
    The graduated sales charges set forth in the table provided in Part A of
this Prospectus 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
individuals and their spouses, parents, children, grandchildren, grandparents,
parents-in-law, sons- and daughters-in-law, siblings, a sibling's spouse and a
spouse's siblings ("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.,
The John Nuveen Company and The McGraw-Hill Companies, Inc., including in each
case these individuals and their immediate family members (as defined above).
However, such Unitholders that hold their Units after the Second Year

                                       9
<PAGE>

Commencement Date (as defined in Part A to this Prospectus) will be subject to a
$0.175 per Unit deferred sales charge. Unitholders of other unit investment
trusts having a similar strategy as the Trust may utilize their termination
proceeds to purchase Units of the Trust, subject only to the deferred sales
charge set forth in Part A of this Prospectus. The dealer concession will be
that applicable to rollovers.
 
    Units may be purchased with sales charges of 2.40% of the Public Offering
Price 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"). 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.
 
    Whether or not Units are being offered for sale, the Sponsor will determine
or cause to be determined 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 based upon the pro rata share per Unit
of the aggregate underlying value of the Securities in such Trust (generally
determined by the closing sale prices of listed Securities and the ask prices of
over-the-counter traded Securities). Afterward, although it is not obligated to
do so, the Sponsor may 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 aggregate
underlying value of the Securities in a Trust (generally determined by the
closing sale prices of listed Securities and the bid prices of over-the-counter
traded Securities). UNITHOLDERS WHO WISH TO DISPOSE OF THEIR UNITS SHOULD
INQUIRE OF THE TRUSTEE OR THEIR BROKER AS TO THE CURRENT REDEMPTION PRICE. Units
subject to a deferred sales charge which are sold or tendered for redemption
prior to such time as the entire deferred sales charge on such Units has been
collected will be assessed the amount of the remaining deferred sales charge at
the time of sale or redemption. However, Unitholders who elect to roll their
Units into a new series of the Trust or a trust with a similar investment
strategy during the Interim Special Redemption and Liquidation Period or
Unitholders who sell or redeem their Units at or before the Second Year
Commencement Date will not be assessed a deferred sales charge for the Second
Year Deferred Period and accordingly are only responsible for the remaining
deferred sales charges for the First Year Deferred Period. (See "REDEMPTION.")
In connection with its secondary market making 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

                                       10

<PAGE>

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
"REDEMPTION.")
 
EVALUATION OF SECURITIES AT THE INITIAL DATE OF DEPOSIT
 
    The prices at which the Securities deposited in the Trusts would have been
offered to the public on the business day prior to the Initial Date of Deposit
were determined by the Trustee.
 
    The amount by which the Trustee's determination of the AGGREGATE VALUE of
the Securities deposited in the Trusts was greater or less than the cost of such
Securities to the Sponsor was PROFIT or LOSS to the Sponsor. (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.
 
TAX STATUS
 
    The following is a general discussion of certain of the Federal income tax
consequences of the purchase, ownership and disposition of the Units. The
summary is limited to investors who hold the Units as "capital assets"
(generally, property held for investment) within the meaning of Section 1221 of
the Internal Revenue Code of 1986 (the "CODE"). Unitholders should consult their
tax advisers in determining the Federal, state, local and any other tax
consequences of the purchase, ownership and disposition of Units in a Trust. For
purposes of the following discussion and opinions, it is assumed that each
Security is equity for Federal income tax purposes.
 
    In the opinion of Chapman and Cutler, special counsel for the Sponsor, under
existing law:
 

        1.  The Trust is not an association taxable as a corporation for Federal
    income tax purposes; each Unitholder will be treated as the owner of a pro
    rata portion of each of the assets of the Trust under the Code; and the
    income of the Trust will be treated as income of the Unitholders thereof
    under the Code. Each Unitholder will be considered to have received his pro
    rata portion of income derived from each Trust asset when such income is
    considered to be received by the Trust. A Unitholder will be considered to
    have received all of the dividends paid on his pro rata portion of each
    Security when such dividends are considered to be received by the Trust
    regardless of whether such dividends are used to pay a portion of the
    deferred sales charge. Unitholders will be taxed in this manner regardless
    of whether distributions from the Trust are actually received by the
    Unitholder or are automatically reinvested.

 

        2.  Each Unitholder will have a taxable event when the Trust disposes of
    a Security (whether by sale, taxable exchange, liquidation, redemption, or
    otherwise) or upon the sale or redemption of Units by such Unitholder
    (except to the extent an in-kind distribution of stock is received by such
    Unitholder as described below). The price a Unitholder pays for his or her
    Units, generally including sales charges, is allocated among his or her pro
    rata portion of each Security held by the Trust (in proportion to the fair
    market values thereof on the valuation date closest to the date the
    Unitholder purchases his or her Units) in order to determine his or her tax
    basis for his or her pro rata portion of each Security held by the Trust.
    Unitholder should consult their own tax advisors with regard to the
    calculation of basis. For Federal income tax purposes, a Unitholder's pro
    rata portion of dividends, as defined by Section 316 of the Code, paid by a
    corporation with respect to a Security held by the Trust is taxable as
    ordinary income to the extent of such corporation's current and accumulated
    "earnings and profits." A Unitholder's pro rata portion of dividends paid on
    such Security which exceeds such current and accumulated earnings and
    profits will first reduce a Unitholder's tax basis in such Security, and to
    the extent that such dividends exceed a Unitholder's tax basis in such
    Security shall generally be treated as capital gain. In general, the


                                       11
<PAGE>

    holding period for such capital gain will be determined by the period of
    time a Unitholder has held his or her Units.

        3.  A Unitholder's portion of gain, if any, upon the sale or redemption
    of Units or the disposition of Securities held by the Trust will generally
    be considered a capital gain (except in the case of a dealer or a financial
    institution). A Unitholder's portion of loss, if any, upon the sale or
    redemption of Units or the disposition of Securities held by the Trust will
    generally be considered a capital loss (except in the case of a dealer or a
    financial institution). Unitholders should consult their tax advisors
    regarding the recognition of such capital gains and losses for Federal
    income tax purposes. In particular, a Rollover Unitholder should be aware
    that a Rollover Unitholder's loss, if any, incurred in connection with the
    exchange of Units for units in the next new series of the Trust (the "NEW
    TRUST"), (the Sponsor intends to create a separate New Trust in conjunction
    with the termination of the Trust) will generally be disallowed with respect
    to the disposition of any Securities pursuant to such exchange to the extent
    that such Unitholder is considered the owner of substantially identical
    securities under the wash sale provisions of the Code taking into account
    such Unitholder's deemed ownership of the securities underlying the Units in
    the New Trust in the manner described above, if such substantially identical
    securities were acquired within a period beginning 30 days before and ending
    30 days after such disposition. However, any gains incurred in connection
    with such an exchange by a Rollover Unitholder would be recognized.
    Unitholders should consult their tax advisers regarding the recognition of
    gains and losses for Federal income tax purposes.

 
    DEFERRED SALES CHARGE.  Generally, the tax basis of a Unitholder includes
sales charges, and such charges are not deductible. A portion of the sales
charge is deferred. It is possible that for Federal income tax purposes, a
portion of the deferred sales charge may be treated as interest which would be
deductible by a Unitholder subject to limitations on the deduction of investment
interest. In such case, the non-interest portion of the deferred sales charge
would be added to the Unitholder's tax basis in his or her Units. The deferred
sales charge could cause the Unitholder's Units to be considered to be
debt-financed under Section 264A of the Code which would result in a small
reduction of the dividends received deduction. In any case, the income (or
proceeds from redemption) a Unitholder must take into account for Federal income
tax purposes is not reduced by amounts deducted to pay the deferred sales
charge. Unitholders should consult their own tax advisers as to the income tax
consequences of the deferred sales charge.
 
    DIVIDENDS RECEIVED DEDUCTION.  A corporation that owns Units will generally
be entitled to a 70% dividends received deduction with respect to such
Unitholder's pro rata portion of dividends received by the Trust (to the extent
such dividends are taxable as ordinary income, as discussed above and are
attributable to domestic corporations) in the same manner as if such corporation
directly owned the Securities paying such dividends (other than corporate
Unitholders, such as "S" corporations, which are not eligible for the deduction
because of their special characteristics and other than for purposes of special
taxes such as the accumulated earnings tax and the personal holding corporation
tax). However, a corporation owning Units should be aware that Sections 246 and
246A of the Code impose additional limitations on the eligibility of dividends
for the 70% dividends received deduction, These limitations include a
requirement that stock (and therefore Units) must generally be held at least 46
days (as determined under and during the period specified in Section 246(c) of
the Code). Final regulations have been issued which address special rules that
must be considered in determining whether the 46-day holding period requirement
is met. Moreover, the allowable percentage of the deduction will be reduced from
70% if a corporate Unitholder owns certain stock (or Units) the financing of
which is directly attributable to indebtedness incurred by such corporation. It
should be noted that various legislative proposals that would affect the
dividends received deduction have been introduced. Unitholders should consult
with their tax advisers with respect to the limitations on and possible
modifications to the dividends received deduction. To the extent dividends
received by the Trust are attributable to foreign corporations, a corporation
that owns Units will not be entitled to the dividends received deduction with
respect to its pro rata portion of such dividends, since the dividends received
deduction is generally available only with respect to dividends paid by domestic
corporations.

                                       12

<PAGE>


    LIMITATIONS ON DEDUCTIBILITY OF TRUST EXPENSES BY UNITHOLDERS.  Each
Unitholder's pro rata share of each expense paid by the Trust is deductible by
the Unitholder to the same extent as though the expense had been paid directly
by him or her. It should be noted that as a result of the Tax Reform Act of
1986, certain miscellaneous itemized deductions, such as investment expenses,
tax return preparation fees and employee business expenses will be deductible by
an individual only to the extent they exceed 2% of such individual's adjusted
gross income. Unitholder's may be required to treat some or all of the expenses
of the Trust as miscellaneous itemized deductions subject to this limitation.
 

    RECOGNITION OF TAXABLE GAIN OR LOSS UPON DISPOSITION OF SECURITIES BY A
TRUST OR DISPOSITION OF UNITS. As discussed above, a Unitholder may recognize
taxable gain (or loss) when a Security is disposed of by the Trust or if the
Unitholder disposes of a Unit (although losses incurred by Rollover Unitholders
may be subject to disallowance, as discussed above). For taxpayers other than
corporations, net capital gain (which is defined as net long-term capital gain
over net short-term capital loss for the taxable year) is subject to a maximum
marginal stated tax rate of either 28% or 20%, depending upon the holding
periods of the capital assets. Capital gain or loss is long-term if the holding
period for the asset is more than one year, and is short-term if the holding
period for the asset is one year or less. Generally, capital gains realized from
assets held for more than one year but not more than 18 months are taxed at a
maximum marginal stated tax rate of 28% and capital gains realized from assets
(with certain exclusions) held for more than 18 months are taxed at a maximum
marginal stated tax rate of 20% (10% in the case of certain taxpayers in the
lowest tax bracket). Further, capital gains realized from assets held for one
year or less are taxed at the same rates as ordinary income. Legislation is
currently pending that provides the appropriate methodology that should be
applied in netting the realized capital gains and losses. Such legislation is
proposed to be effective retroactively for tax years ending after May 6, 1997.
The date on which a Unit is acquired (i.e., the "trade date") is excluded for
purposes of determining the holding period of a Unit. However, it should be
noted that legislative proposals are introduced from time to time that affect
tax rates and could affect relative differences at which ordinary income and
capital gains are taxed.

 
    In addition, please note that capital gains may be recharacterized as
ordinary income in the case of certain financial transactions that are
"conversion transactions" effective for transactions entered into after April
30, 1993. Unitholders and prospective investors should consult with their tax
advisers regarding the potential effect of this provision on their investment in
Units.
 
    If the Unitholder disposes of a Unit, he or she is deemed thereby to have
disposed of his or her entire pro rata interest in all assets of the Trust
including his or her pro rata portion of all the Securities represented by the
Unit.
 
    The Taxpayer Relief Act of 1997 (the "1997 Act") includes provisions that
treat certain transactions designed to reduce or eliminate risk of loss and
opportunities for gain (e.g., short sales, offsetting notional principal
contracts, futures or forward contracts or similar transactions) as constructive
sales for purposes of recognition of gain (but not loss) and for purposes of
determining the holding period. Unitholders should consult their own tax
advisors with regard to any such constructive sales rules.
 
    SPECIAL TAX CONSEQUENCES OF IN-KIND DISTRIBUTIONS UPON REDEMPTION OF UNITS,
TERMINATION OF A TRUST AND INVESTMENT IN A NEW TRUST.  As discussed in
"REDEMPTION" and "OTHER INFORMATION -- TERMINATION OF INDENTURE," under certain
circumstances a Unitholder who owns at least 2,500 Units of a Trust may request
an In-Kind Distribution upon the redemption of Units or the termination of such
Trust. The Unitholder requesting an In-Kind Distribution will be liable for
expenses related thereto (the "DISTRIBUTION EXPENSES") and the amount of such
In-Kind Distribution will be reduced by the amount of the Distribution Expenses.
See "DISTRIBUTIONS TO UNITHOLDERS." As previously discussed, prior to the
redemption of Units or the termination of a Trust, a Unitholder is considered as
owning a pro rata portion of each of the Trust's assets for Federal income tax
purposes. The receipt of an In-Kind Distribution upon the redemption of

                                       13

<PAGE>

Units or the termination of a Trust will result in a Unitholder receiving an
undivided interest in whole shares of stock plus, possibly, cash.
 
    The potential tax consequences that may occur under an In-Kind Distribution
will depend on whether or not a Unitholder receives cash in addition to
Securities. A "Security" for this purpose is a particular class of stock issued
by a particular corporation. A Unitholder will not recognize gain or loss if a
Unitholder only receives Securities in exchange for his or her pro rata portion
in the Securities held by the Trust. However, if a Unitholder also receives cash
in exchange for a fractional share of a Security held by the Trust, such
Unitholder will generally recognize gain or loss based upon the difference
between the amount of cash received by the Unitholder and his or her tax basis
in such fractional share of a Security held by the Trust.
 
    Because the Trust will own many Securities, a Unitholder who requests an
In-Kind Distribution will have to analyze the tax consequences with respect to
each Security owned by the Trust. The amount of taxable gain (or loss)
recognized upon such exchange will generally equal the sum of the gain (or loss)
recognized under the rules described above by such Unitholder with respect to
each Security owned by the Trust. Unitholders who request an In-Kind
Distribution are advised to consult their tax advisers in this regard.
 
    As discussed in "SPECIAL REDEMPTION, LIQUIDATION AND INVESTMENT IN A NEW
TRUST," a Unitholder may elect to become a Rollover Unitholder. To the extent a
Rollover Unitholder exchanges his or her Units for Units of the New Trust in a
taxable transaction, such Unitholder will recognize gains, if any, but generally
will not be entitled to a deduction for any losses recognized upon the
disposition of any Securities pursuant to such exchange to the extent that such
Unitholder is considered the owner of substantially identical securities under
the wash sale provisions of the Code taking into account such Unitholder's
deemed ownership of the securities underlying the Units in the New Trust in the
manner described above, if such substantially identical securities were acquired
within a period beginning 30 days before and ending 30 days after such
disposition under the wash sale provisions contained in Section 1091 of the
Code. In the event a loss is disallowed under the wash sale provisions, special
rules contained in Section 1091(d) of the Code apply to determine the
Unitholder's tax basis in the securities acquired. Rollover Unitholders are
advised to consult their tax advisers.
 
    COMPUTATION OF THE UNITHOLDER'S TAX BASIS.  Initially, a Unitholder's tax
basis in his or her Units will generally equal the price paid by such Unitholder
for his or her Units. The cost of the Units is allocated among the Securities
held in the Trust in accordance with the proportion of the fair market values of
such Securities on the valuation date nearest the date the Units are purchased
in order to determine such Unitholder's tax basis for his or her pro rata
portion of each Security.
 
    A Unitholder's tax basis in his or her Units and his or her pro rata portion
of a Security held by the Trust will be reduced to the extent dividends paid
with respect to such Security are received by the Trust which are not taxable as
ordinary income as described above.
 
    GENERAL.  Each Unitholder will be requested to provide the Unitholder's
taxpayer identification number to the Trustee and to certify that the Unitholder
has not been notified that payments to the Unitholder are subject to back-up
withholding. If the proper taxpayer identification number and appropriate
certification are not provided when requested, distributions by the Trust to
such Unitholder (including amounts received upon the redemption of Units) will
be subject to back-up withholding. Distributions by the Trust (other than those
that are not treated as United States source income, if any) will generally be
subject to United States income taxation and withholding in the case of Units
held by non-resident alien individuals, foreign corporations or other non-United
States persons. Such persons should consult their tax advisers.
 

    In general, income that is not effectively connected to the conduct of a
trade or business within the United States that is earned by non-U.S.
Unitholders and derived from dividends of foreign corporations will not be
subject to U.S. withholding tax provided that less than 25 percent of the gross
income of the foreign


                                       14
<PAGE>

corporation for a three-year period ending with the close of its taxable year
preceding payment was not effectively connected to the conduct of a trade or
business within the United States. In addition, such earnings may be exempt from
U.S. withholding pursuant to a specific treaty between the United States and a
foreign country. Non-U.S. Unithholders should consult their own tax advisers
regarding the imposition of U.S. withholding on distributions from the Trust.

 

    It should be noted that payments to the Trust of dividends on Equity
Securities that are attributable to foreign corporations may be subject to
foreign withholding taxes and Unitholders should consult their own tax advisers
regarding the potential tax consequences relating to the payment of any such
withholding taxes by the Trust. Any dividends withheld as a result thereof will
nevertheless be treated as income to the Unitholders. Because, under the grantor
trust rules, an investor is deemed to have paid directly his share of foreign
taxes that have been paid or accrued, if any, an investor may be entitled to a
foreign tax credit or deduction for United States purposes with respect to such
taxes. The 1997 Act imposes a required holding period for such credits.
Investors should consult their tax advisers with respect to foreign withholding
taxes and foreign tax credits.

 
    At the termination of the Trust, the Trustee will furnish to each Unitholder
a statement containing information relating to the dividends received by the
Trust on the Securities, the gross proceeds received by the Trust from the
disposition of any Security (resulting from redemption or the sale of any
Security) and the fees and expenses paid by the Trust. The Trustee will also
furnish annual information returns to Unitholders and the Internal Revenue
Service.
 
    Unitholders desiring to purchase Units for tax-deferred plans and IRAs
should consult their broker for details on establishing such accounts. Units may
also be purchased by persons who already have self-directed plans established.
See "RETIREMENT PLANS."
 

    The foregoing discussion relates only to the tax treatment of U.S.
Unitholders ("U.S. Unitholder") with regard to federal and certain aspects of
New York State and City income taxes. Unitholders may be subject to taxation in
New York or in other jurisdictions and should consult their own tax advisers in
this regard. As used herein, the term "U.S. Unitholder" means an owner of a Unit
in the Trust that (a) is (i) for United States federal income tax purposes a
citizen or resident of the United States, (ii) a corporation, partnership or
other entity created or organized in or under the laws of the United States or
of any political subdivision thereof, or (iii) an estate or trust the income of
which is subject to United States federal income taxation regardless of its
source or (b) does not qualify as a U.S. Unitholder in paragraph (a) but whose
income from a Unit is effectively connected with such Unitholder's conduct of a
United States trade or business. The term also includes certain former citizens
of the United States whose income and gain on the Units will be taxable.

 
    In the opinion of Carter, Ledyard & Milburn, Special Counsel to the Trusts
for New York tax matters, under the existing income tax laws of the State 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 thereof.
 
RETIREMENT PLANS
 
    Units of the Trusts may be well suited for purchase by Individual Retirement
Accounts, Keogh Plans, pension funds and other tax-deferred retirement plans.
Generally the Federal income tax relating to capital gains and income received
in each of the foregoing plans is deferred until distributions are received.
Distributions from such plans are generally treated as ordinary income but may,
in some cases, be eligible for special averaging or tax-deferred rollover
treatment. Investors considering participation in any such plan should review
specific tax laws related thereto and should consult their attorneys or tax
advisers with respect to the establishment and maintenance of any such plan.
Such plans are offered by brokerage firms and other financial institutions. Fees
and charges with respect to such plans may vary.

                                       15
<PAGE>

TRUST OPERATING EXPENSES
 
    No annual advisory fee is charged to the Trusts by the Sponsor. Estimated
annual Trust expenses are as set forth in Part A of this Prospectus; if actual
expenses are higher than the estimate, the excess will be borne by the Trust.
The estimated expenses do not include the brokerage commissions payable by the
Trust in purchasing and selling Securities.
 
    The Trustee receives for ordinary recurring services an annual fee for each
Trust as set forth in "EXPENSE INFORMATION" appearing in Part A of this
Prospectus. 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 Income and Capital 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.
 

    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 amortized 
and paid by the Trust. 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 Securities 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 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 
Securities in order to pay these amounts if funds are not otherwise available 
in the applicable Income and Capital Accounts.

 
DISTRIBUTIONS TO UNITHOLDERS
 
    The Trustee will distribute any net income received with respect to any of
the Securities in a Trust on or about the Income Distribution Dates to
Unitholders of record on the preceding Income Record Date. See "DISTRIBUTIONS"
in Part A of this Prospectus. Persons who purchase Units will commence receiving
distributions only after such person becomes a Record Owner. Notification to the
Trustee of the transfer of Units is the responsibility of the purchaser, but in
the normal course of business such notice is provided by the selling
broker/dealer. Proceeds received on the sale of any Securities in a Trust, to
the extent not used to meet redemptions of Units, pay the deferred sales charge
or pay expenses will, however, be distributed on the last day of each month if
the amount available for distribution equals at least $1.00 per 100 Units
("CAPITAL DISTRIBUTION DATES") to Unitholders of record on the fifteenth day of
each applicable month ("CAPITAL RECORD DATES"). The Trustee is not required to
pay interest on funds held in the Capital Account of a Trust (but may itself
earn interest thereon and therefore benefit from the use of such funds). A
Unitholder's pro rata portion of the Capital Account, less expenses, will be
distributed as part of the final liquidation distribution.

                                       16

<PAGE>

    It is anticipated that the deferred sales charge will be collected from the
Capital Account of the Trusts and that amounts in the Capital Account will be
sufficient to cover the cost of the deferred sales charge. To the extent that
amounts in the Capital Account are insufficient to satisfy the then current
deferred sales charge obligation, Securities may be sold to meet such shortfall.
Distributions of amounts necessary to pay the deferred portion of the sales
charge will be made to an account designated by the Sponsor for purposes of
satisfying Unitholder's deferred sales charge obligations.
 
    Under regulations issued by the Internal Revenue Service, the Trustee is
required to withhold a specified percentage of any distribution made by a Trust
if the Trustee has not been furnished the 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 under certain circumstances by contacting the Trustee, otherwise the
amount may be recoverable only when filing a tax return. Under normal
circumstances the Trustee obtains the Unitholder's tax identification number
from the selling broker. However, a Unitholder should examine his or her
statements from the Trustee to make sure that the Trustee has been provided a
certified tax identification number in order to avoid this possible "back-up
withholding." In the event the Trustee has not been previously provided such
number, one should be provided as soon as possible.
 
    Within a reasonable time after a Trust is terminated, each Unitholder who is
not a Rollover Unitholder will, upon surrender of his Units for redemption,
receive (i) the pro rata share of the amounts realized upon the disposition of
Securities, unless he or she elects an In-Kind Distribution as described under
"OTHER INFORMATION -- TERMINATION OF INDENTURE" and (ii) a pro rata share of any
other assets of such Trust, less expenses of such Trust.
 
    The Trustee will credit to the Income Account of a Trust any dividends
received on the Securities therein. All other receipts (E.G., return of capital,
etc.) are credited to the Capital Account of the Trust.
 
    The Trustee may establish reserves (the "RESERVE ACCOUNT") within the Trust
for state and local taxes, if any, and any governmental charges payable out of
such Trust.
 
    DISTRIBUTION REINVESTMENT.  Any Unitholder may elect to have each
distribution of income on his Units, other than the final liquidating
distribution in connection with the termination of a Trust or interim
liquidating distribution for Interim Rollover Unitholders, automatically
reinvested in additional Units of such Trust. Each person who purchases Units of
a Trust may elect to participate in the reinvestment option by notifying the
Trustee in writing of their election. Reinvestment may not be available in all
states. Notification to the Trustee must be received within 10 days prior to the
Record Date for such distributions. Each subsequent distribution of income
and/or capital, as selected by the Unitholder, will be automatically applied by
the Trustee to purchase additional Units of a Trust. The remaining deferred
sales charge payments will be assessed on Units acquired pursuant to
reinvestment. IT SHOULD BE REMEMBERED THAT EVEN IF DISTRIBUTIONS ARE REINVESTED,
THEY ARE STILL TREATED AS DISTRIBUTIONS FOR INCOME TAX PURPOSES.
 
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 income and capital
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.

                                       17

<PAGE>

    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 capital only reinvestment to reinvestment of both
capital and income or vice versa, or to terminate their participation in the
Accumulation Plan altogether and receive future distributions on their Units in
cash. Such notice will be effective as of the next Record Date occurring at
least 10 days after the Trustee's receipt of the notice. 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.
 
REPORTS TO UNITHOLDERS
 
    The Trustee shall furnish Unitholders of a Trust in connection with each
distribution, a statement of the amount of income, 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. 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 (1) a summary of transactions in the Trust
for such year; (2) any Security sold during the year and the Securities held at
the end of such year by the Trust; (3) the redemption price per Unit based upon
a computation thereof on the 31st day of December of such year (or the last
business day prior thereto); and (4) amounts of income and capital distributed
during such year.
 
    In order to comply with Federal and state tax reporting requirements,
Unitholders will be furnished, upon request to the Trustee, evaluations of the
Securities in the Trust furnished to it by the Sponsor.
 
UNIT VALUE AND EVALUATION
 

    The value of the Trust is determined by the Trustee on the basis of (1) the
cash on hand in the Trust other than cash deposited in the Trust to purchase
Securities not applied to the purchase of such Securities; (2) the aggregate
value of the Securities held in the Trust, as determined by the Evaluator on the
basis of the aggregate underlying value of the Securities in the Trust next
computed; (3) dividends receivable on the Securities trading ex-dividend as of
the date of computation; (4) amounts representing organizational expenses paid
from the Trust less amounts representing accrued organizational expenses of the
Trust; and (5) all other assets of the Trust; and deducting therefrom: (1)
amounts representing any applicable taxes or governmental charges and amounts
due the Sponsor or Trustee for indemnification or extraordinary expenses payable
out of such Trust for which no deductions had been made for the purpose of
additions to the Reserve Account; (2) any amounts owing to the Trustee for its
advances; (3) an amount representing estimated accrued expenses of the Trust,
including, but not limited to, unpaid fees and expenses of the Trustee
(including legal fees) and the Sponsor; (4) cash held for distribution to
Unitholders of record of the Trust or for redemption of tendered Units as of the
business day prior to the evaluation being made; and (5) other liabilities
incurred by the Trust. The result of such computation is divided by the number
of Units of such Trust outstanding as of the date thereof and rounded to the
nearest cent to determine the per Unit value ("UNIT VALUE") of such Trust. The
Trustee may determine the aggregate underlying value of the Securities in the
Trust in the following manner: if the Securities are listed on a securities
exchange or the NASDAQ National Market System, this evaluation is generally
based on the closing sale prices on that exchange or that system (unless it is
determined that these prices are inappropriate as a basis for valuation) or, if
there is no closing sale price on that exchange or system, at the closing bid
prices. If the Securities are not so listed or, if so listed and the principal
market therefor is other than on a securities exchange, the evaluation shall
generally be based on the current bid prices on the over-the-counter market
(unless these prices are inappropriate as a basis for evaluation). If current
bid prices are unavailable, the evaluation is generally determined (a) on the
basis of current bid prices for comparable securities, (b) by appraising the
value of the Securities on the bid side of the market or (c) by any combination
of the above.


                                       18
<PAGE>

DISTRIBUTIONS OF UNITS 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 the Trusts for
sale under the laws of substantially all of the states of the United States of
America.
 

    Promptly following the deposit of Securities 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 $3,000 or 300 Units ($1,000 or 100
Units for traditional and Roth IRA accounts and $500 or 50 Units for Education
IRA accounts), 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 distribution of Units. The amounts of such discounts are set forth in
Part A of this Prospectus.
 
    The Sponsor may maintain a secondary market for Units of each Trust. See
"MARKET FOR UNITS."
 
    The Sponsor reserves the right to change the amount of the dealer
concessions set forth in Part A of this Prospectus from time to time.
 
    At the discretion of the Sponsor, volume incentives can be earned as a
marketing allowance by dealer firms who reach cumulative firm sales or sales
arrangement levels of a specified number of Units of an individual Trust during
the primary offering period as set forth in the table below. For firms that meet
the necessary volume level for a Trust, volume incentives may be given on all
trades involving that Trust originated from or by that firm during the primary
offering period.
 
Primary Market Volume Incentives
 
<TABLE>
<CAPTION>
        PER TRUST SALES LEVEL DURING           VOLUME INCENTIVE
         THE PRIMARY OFFERING PERIOD               PER UNIT
- ---------------------------------------------  -----------------
<S>                                            <C>
500,000 but less than 1,000,000 Units              $   0.005
1,000,000 but less than 2,000,000 Units            $   0.010
2,000,000 Units or more                            $   0.020
</TABLE>
 
    Only sales through the Sponsor qualify for volume incentives and for meeting
minimum requirements. The Sponsor reserves the right to modify or change the
volume incentive schedule at any time and make the determination as to which
firms qualify for the marketing allowance and the amount paid.
 
    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 "PUBLIC OFFERING PRICE.")
 
    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

                                       19


<PAGE>

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 registered Certificates unless the
Unitholder expressly requests that ownership be evidenced by a book entry
position recorded on the books and records of the Trustee. 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 Unitholder will receive a Book Entry Position Confirmation reflecting
their ownership.
 
    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 Unitholders. 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.
 
REDEMPTION
 
    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

                                       20
<PAGE>

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 Unitholders. 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 ("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 Securities on the date of tender. Units subject to a deferred sales charge
which are tendered for redemption prior to such time as the entire deferred
sales charge on such Units has been collected will be assessed the amount of the
remaining deferred sales charge at the time of redemption. However, Unitholders
who elect to roll their Units into a new series of the Trust or a trust with a
similar investment strategy during the Interim Special Redemption and
Liquidation Period or Unitholders who sell or redeem their Units at or before
the Second Year Commencement Date will not be assessed a deferred sales charge
for the Second Year Deferred Period and accordingly are only responsible for the
remaining deferred sales charges for the First Year Deferred Period. In
addition, in the event of the death of a Unitholder within the one-year period
prior to redemption, any deferred sales charge remaining at the time of
redemption shall be waived. 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.
 
    Any Unitholder tendering 2,500 Units or more for redemption may request by
written notice submitted at the time of tender from the Trustee, in lieu of a
cash redemption, a distribution of shares of Securities in an amount and value
of Securities per Unit equal to the Redemption Price Per Unit, as determined as
of the evaluation next following tender. In-kind distributions ("IN-KIND
DISTRIBUTIONS") shall be made by the Trustee through the distribution of each of
the Securities in book-entry form to the account of the Unitholder's bank or
broker/dealer at the Depository Trust Company. An In-Kind Distribution will be
reduced by customary transfer and registration charges. The tendering Unitholder
will receive his pro rata number of whole shares of each of the Securities
comprising a portfolio and cash from the Capital Account equal to the fractional
shares to which the tendering Unitholder is entitled. The Trustee may adjust the
number of shares of any issue of Securities included in a Unitholder's In-Kind
Distribution to facilitate the distribution of whole shares, such adjustment to
be made on the basis of the value of Securities on the date of tender. If funds
in the Capital Account are insufficient to cover the required cash distribution
to the tendering Unitholder, the Trustee may sell Securities in the manner
described below.
 
                                       21
<PAGE>

    Under regulations issued by the Internal Revenue Service, the Trustee may 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. For further
information regarding this withholding, see "DISTRIBUTIONS TO UNITHOLDERS." In
the event the Trustee has not been previously provided such number, one must be
provided at the time redemption is requested.

 
    Any amounts paid on redemption representing income shall be withdrawn from
the Income Account of a Trust to the extent that funds are available for such
purpose, or from the Capital Account. All other amounts paid on redemption shall
be withdrawn from the Capital Account.
 
    The Trustee is empowered to sell Securities of the Trusts in order to make
funds available for redemption. To the extent that Securities are sold, the size
and diversity of the Trust will be reduced. Such sales may be required at a time
when Securities would not otherwise be sold and might result in lower prices
than might otherwise be realized.
 
    The Redemption Price per Unit during the secondary market will be determined
on the basis of the aggregate underlying value of the Securities in a Trust plus
or minus cash, if any, in the Income and Capital Accounts of such Trust. The
Redemption Price per Unit is equal to the pro rata share of each Unit determined
by the Trustee by adding: (1) the cash on hand in the Trust other than cash
deposited in the Trust to purchase Securities not applied to the purchase of
such Securities; (2) the aggregate underlying value of the Securities held in
such Trust, as determined by the Trustee on the basis of the evaluation next
computed; and (3) dividends receivable on the Securities trading ex-dividend as
of the date of computation; and deducting therefrom: (1) amounts representing
any applicable taxes or governmental charges payable out of such Trust; (2) any
amounts owing to the Trustee for its advances; (3) an amount representing
estimated accrued expenses of such Trust, including but not limited to fees and
expenses of the Trustee (including legal fees), and supervisory fees, if any;
(4) cash held for distribution to Unitholders of record of such Trust or for
redemption of tendered Units as of the business day prior to the evaluation
being made; and (5) other liabilities incurred by such Trust; and finally
dividing the results of such computation by the number of Units of such Trust
outstanding as of the date thereof. The redemption price per Unit will be
assessed the amount, if any, of the remaining deferred sales charge at the time
of redemption.
 
    The aggregate value of the Securities for purposes of the Redemption Price
during the secondary market and the Secondary Market Public Offering Price will
be determined in the following manner: if the Securities are listed on a
securities exchange or the NASDAQ National Market System, this evaluation is
generally based on the closing sale prices on that exchange or that system
(unless it is determined that these prices are inappropriate as a basis for
valuation) or, if there is no closing sale price on that exchange or system, at
the closing bid prices. If the Securities are not so listed or, if so listed and
the principal market therefore is other than on a securities exchange, the
evaluation shall generally be based on the current bid prices on the over-
the-counter market (unless these prices are inappropriate as a basis for
evaluation). If current bid prices are unavailable, the evaluation is generally
determined (a) on the basis of current bid prices for comparable securities, (b)
by appraising the value of the Securities on the bid side of the market or (c)
by any combination of the above.
 
    The right of redemption may be suspended and payment postponed for any
period during which the New York Stock Exchange is closed, other than for
customary weekend and holiday closings, or during which the Securities and
Exchange Commission determines that trading on the New York Stock Exchange is
restricted or any emergency exists, as a result of which disposal or evaluation
of the Securities is not reasonably practicable, or for such other periods as
the Securities and Exchange Commission may by order permit. Under certain
extreme circumstances, the Sponsor may apply to the Securities and Exchange
Commission for an order permitting a full or partial suspension of the right of
Unitholders to redeem their Units. The Trustee is not liable to any person in
any way for any loss or damage which may result from any such suspension or
postponement.
 
                                       22
<PAGE>

SPECIAL REDEMPTION, LIQUIDATION AND INVESTMENT IN A NEW TRUST
 
    It is expected that a special redemption and liquidation will be made of all
Units of a Trust held by any Unitholder (a "ROLLOVER UNITHOLDER") who
affirmatively notifies the Trustee in writing that he or she desires to
participate as a Rollover Unitholder by the appropriate Rollover Notification
Date specified in the "ESSENTIAL INFORMATION" appearing in Part A of this
Prospectus.
 
    All Units of Rollover Unitholders will be redeemed In-Kind during the
appropriate Special Redemption and Liquidation Period and the underlying
Securities will be distributed to the Distribution Agent (currently the Trustee)
on behalf of the Rollover Unitholders. During the appropriate Special Redemption
and Liquidation Period (as set forth in "ESSENTIAL INFORMATION" in Part A), the
Distribution Agent will be required to sell all of the underlying Securities on
behalf of Rollover Unitholders. The sales proceeds will be net of brokerage
fees, governmental charges or any expenses involved in the sales.
 
    The Distribution Agent may engage the Sponsor, as its agent, or other
brokers to sell the distributed Securities. The Securities will be sold as
quickly as is practicable during the appropriate Special Redemption and
Liquidation Period. The Sponsor does not anticipate that the period will be
longer than one or two days, given that the Securities are usually highly
liquid. The liquidity of any Security depends on the daily trading volume of the
Security and the amount that the Sponsor has available for sale on any
particular day.
 
    The Rollover Unitholders' proceeds will be invested in a New Trust or a
trust with a similar investment strategy (as selected by the Unitholder), if
then registered and being offered. The proceeds of redemption will be used to
buy New Trust units as the proceeds become available. Any Rollover Unitholder
may thus be redeemed out of a Trust and become a holder of an entirely different
trust, a New Trust, with a different portfolio of Securities. In accordance with
the Rollover Unitholders' offer to purchase the New Trust units, the proceeds of
the sales (and any other cash distributed upon redemption) will be invested in a
New Trust, at the public offering price, including the applicable maximum sales
charge per Unit (which for Rollover Unitholders is currently expected to be
$0.35 per unit for the New Series of a Trust, all of which will be deferred as
provided herein).
 
    The Sponsor intends to create the New Trust units as quickly as possible,
depending upon the availability and reasonably favorable prices of the
Securities included in a New Trust portfolio, and it is intended that Rollover
Unitholders will be given first priority to purchase the New Trust units. The
Sponsor may also permit Rollover Unitholders to elect to have their proceeds
invested in a trust with a similar investment strategy, if such trust is then
registered in the Unitholder's state of residence and being offered. There can
be no assurance, however, as to the exact timing of the creation of the New
Trust units or the aggregate number of New Trust units which the Sponsor will
create. The Sponsor may, in its sole discretion, stop creating new units
(whether permanently or temporarily) at any time it chooses, regardless of
whether all proceeds of the Special Redemption and Liquidation have been
invested on behalf of Rollover Unitholders. Cash which has not been invested on
behalf of the Rollover Unitholders in New Trust units will be distributed within
a reasonable time after such occurrence. However, since the Sponsor can create
units, the Sponsor anticipates that sufficient units can be created, although
moneys in a New Trust may not be fully invested on the next business day.
 
    The process of redemption, liquidation, and investment in a New Trust is
intended to allow for the fact that the portfolios selected by the Sponsor are
chosen on the basis of growth potential only for a 26 month period, at which
point a new portfolio is chosen. It is contemplated that a similar process of
redemption, liquidation and investment in a New Trust will be available 13
months after the deposit of each Trust and as each Trust terminates.
 
    It should also be noted that Rollover Unitholders may realize taxable
capital gains on the Special Redemption and Liquidation but, in certain
circumstances, will not be entitled to a deduction for certain

                                       23
<PAGE>

capital losses and, due to the procedures for investing in a New Trust, no cash
would be distributed at that time to pay any taxes. Included in the cash for the
applicable Special Redemption and Liquidation may be an amount of cash
attributable to a Unitholder's final distribution of dividend income;
accordingly, Rollover Unitholders also will not have cash from this source
distributed to pay any taxes. See "Tax Status." On August 5, 1997, legislation
(the "Act") was enacted that reduces the maximum stated marginal tax rate for
certain capital gains for investments held for more than 18 months to 20% (10%
in the case of certain taxpayers in the lowest tax bracket). Potential investors
should consult their tax advisors regarding the potential effect of the Act on
their investment in Units. In addition, it should be noted that legislative
proposals are introduced from time to time that affect tax rates and could
affect relative differences at which ordinary income and capital gains are
taxed.
 
    In addition, during this period a Unitholder will be at risk to the extent
that Securities are not sold and will not have the benefit of any stock
appreciation to the extent that moneys have not been invested; for this reason,
the Sponsor will be inclined to sell and purchase the Securities in as short a
period as it can without materially adversely affecting the price of the
Securities.
 
    Unitholders who do not inform the Distribution Agent that they wish to have
their Units so redeemed and liquidated ("REMAINING UNITHOLDERS") will not
realize capital gains or losses due to the Special Redemption and Liquidation,
and will not be charged any additional sales charge.
 
    The Sponsor may for any reason, in its sole discretion, decide not to
sponsor the New Trusts or any subsequent series of the Trusts, without penalty
or incurring liability to any Unitholder. If the Sponsor so decides, the Sponsor
shall notify the Unitholders before the appropriate Special Redemption and
Liquidation Period. All Unitholders will then be remaining Unitholders, with
rights to ordinary redemption as before. See "REDEMPTION." The Sponsor may
modify the terms of the New Trusts or any subsequent series of the Trusts. The
Sponsor may also modify, suspend or terminate the Rollover Option upon notice to
the Unitholders of such amendment at least 60 days prior to the effective date
of such amendment.
 
PURCHASE OF UNITS 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 "REDEMPTION.") 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.
 
REMOVAL OF SECURITIES FROM THE TRUSTS
 
    The portfolio of the Trust is not "managed" by the Sponsor or the Trustee;
their activities described herein are governed solely by the provisions of the
Indenture. The Indenture provides that the Sponsor may (but need not) direct the
Trustee to dispose of an Security in the event that an issuer defaults in the
payment of a dividend that has been declared, that any action or proceeding has
been instituted restraining the payment of dividends or there exists any legal
question or impediment affecting such Security, that the issuer of the Security
has breached a covenant which would affect the payments of dividends, the credit
standing of the issuer or otherwise impair the sound investment character of the
Security, that the issuer has defaulted on the payment on any other of its
outstanding obligations, that the price of the Security has declined to such an
extent or other such credit factors exist so that in the opinion of the Sponsor,
the retention of such Securities would be detrimental to a Trust. Except as
stated under "COMPOSITION OF TRUSTS" for Failed Securities, the acquisition by a
Trust of any securities or other property other than the Securities is
prohibited. Pursuant

                                       24
<PAGE>

to the Indenture and with limited exceptions, the Trustee may sell any
securities or other property acquired in exchange for Securities such as those
acquired in connection with a merger or other transaction. If offered such new
or exchanged securities or property, the Trustee shall reject the offer.
However, in the event such securities or property are nonetheless acquired by a
Trust, they may be accepted for deposit in a Trust and either sold by the
Trustee or held in a Trust pursuant to the direction of the Sponsor. Proceeds
from the sale of Securities by the Trustee are credited to the Capital Account
of a Trust for distribution to Unitholders or to meet redemptions.
 
    The Trustee may also sell Securities designated by the Sponsor, or if not so
directed, in its own discretion, for the purpose of redeeming Units of a Trust
tendered for redemption and the payment of expenses.
 
    The Sponsor, in designating Securities to be sold by the Trustee, will
generally make selections in order to maintain, to the extent practicable, the
proportionate relationship among the number of shares of individual issues of
Securities. To the extent this is not practicable, the composition and diversity
of the Securities may be altered. In order to obtain the best price for a Trust,
it may be necessary for the Sponsor to specify minimum amounts (generally 100
shares) in which blocks of Securities are to be sold.
 
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 Securities. 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 Securities 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.
 
                                       25
<PAGE>

    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
 
    Since our founding in 1898, Nuveen has been synonymous with investments that
withstand the test of time. Today, we offer a broad range of investments
designed for mature investors whose portfolio is the principal source of their
ongoing financial security. More than 1.3 million investors have entrusted
Nuveen to help them maintain the lifestyle they currently enjoy.
 
    A value investing approach--purchasing securities of strong companies and
communities that represent good long-term value--is the cornerstone of Nuveen's
investment philosophy. It is a careful, long-term strategy that offers the
potential for attractive returns with moderated risk. Successful value investing
begins with in-depth research and a discerning eye for marketplace opportunity.
Nuveen's team of investment professionals is backed by the discipline, resources
and expertise of almost a century of investment experience, including one of the
most recognized research departments in the industry.
 
    To meet the unique circumstances and financial planning needs of mature
investors, Nuveen offers a wide array of taxable and tax-free investment
products--including equity and fixed-income mutual funds, unit trusts,
exchange-traded funds, customized asset management services and cash management
products.
 
    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 West Wacker
Drive). 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 Sponsor may produce
software or additional sales literature to promote the advantages of using the
Trusts to meet these and other specific investor needs.
 
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, without the consent of
100% of the Unitholders, to permit the deposit or acquisition of securities
either in addition to, or in substitution for any of the Securities initially
deposited in any Trust except as stated in "COMPOSITION OF TRUSTS" regarding the
creation of additional Units and the limited right of substitution of
Replacement Securities and except for the substitution of refunding securities
under certain circumstances. The Trustee shall advise the Unitholders of


                                       26
<PAGE>

any amendment requiring the consent of Unitholders, or upon request of the
Sponsor, promptly after execution thereof.
 
TERMINATION OF INDENTURE
 
    The Trust may be liquidated at any time by an instrument executed by the
Sponsor and consented to by 66 2/3% of the Units of the Trust then outstanding.
The Trust may also be liquidated by the Trustee when the value of such Trust, as
shown by any evaluation, is less than 20% of the total value of the Securities
deposited in the Trust as of the conclusion of the primary offering period and
may 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. The sale of Securities from the Trust 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 amount of Securities originally represented by the Units held by such
Unitholder. The Indenture will terminate upon the redemption, sale or other
disposition of the last Security held thereunder, but in no event shall it
continue beyond the Mandatory Termination Date set forth under "ESSENTIAL
INFORMATION" in Part A of this Prospectus.
 
    Commencing on the Mandatory Termination Date, Securities will begin to be
sold in connection with the termination of the Trust. The Sponsor will determine
the manner, timing and execution of the sale of the Securities. Written notice
of any termination of a Trust specifying the time or times at which Unitholders
may surrender their certificates for cancellation shall be given by the Trustee
to each Unitholder at his address appearing on the registration books of such
Trust maintained by the Trustee. Unitholders not electing a distribution of
shares of Securities and who do not elect the Rollover Option will receive a
cash distribution from the sale of the remaining Securities within a reasonable
time after the Trust is terminated. Regardless of the distribution involved, the
Trustee will deduct from the funds of a Trust any accrued costs, expenses,
advances or indemnities provided by the Indenture, 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. Trustee will then distribute to each Unitholder his pro rata share of
the balance of the Income and Capital Accounts.
 
LEGAL OPINION
 
    The legality of the Units offered hereby has been passed upon by Chapman and
Cutler, 111 West Monroe Street, Chicago, Illinois 60603. Carter, Ledyard &
Milburn, 2 Wall Street, New York, New York 10005, has acted as counsel for the
Trustee with respect to the Series.
 
AUDITORS
 
    The "STATEMENT OF CONDITION" and "SCHEDULE OF INVESTMENTS" at Initial 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. This
supplement includes additional general information about the Sponsor and the
Trusts.

                                       27
<PAGE>

                               NUVEEN UNIT TRUSTS
                   NUVEEN -- CONCENTRATED GROWTH PORTFOLIO
                              PROSPECTUS -- PART B
                                  ____________, 1998

 
<TABLE>
<C>                                  <S>
                            Sponsor  John Nuveen & Co. Incorporated
                                     333 West Wacker Drive
                                     Chicago, IL 60606-1286
 
                            Trustee  The Chase Manhattan Bank
                                     4 New York Plaza
                                     New York, NY 10004-2413
                                     Telephone: 800-257-8787
 
           Legal Counsel to Sponsor  Chapman and Cutler
                                     111 West Monroe Street
                                     Chicago, IL 60603
 
                        Independent  Arthur Andersen LLP
                 Public Accountants  33 West Monroe Street
                      for the Trust  Chicago, IL 60603
</TABLE>
 
    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.
 
    When Units of the Trusts are no longer available, or for investors who will
reinvest into subsequent series of the Trusts, this Prospectus may be used as a
preliminary prospectus for a future series; in which case investors should note
the following:
 
    INFORMATION CONTAINED HEREIN IS SUBJECT TO AMENDMENT. A REGISTRATION
STATEMENT RELATING TO SECURITIES OF A FUTURE SERIES 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.
 
    THE 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 SUCH STATE.
 
    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.
<PAGE>

                               NUVEEN UNIT TRUSTS
                NUVEEN--CONCENTRATED GROWTH PORTFOLIO TRUST PROSPECTUS
                                           , 1998
                               NUVEEN UNIT TRUSTS
                             INFORMATION SUPPLEMENT
                         NUVEEN UNIT TRUSTS, SERIES 12

 
    The Information Supplement provides additional information concerning the
structure and operations of a Nuveen 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 ______________ 1998. Capitalized terms
have been defined in the Prospectus.

 
                               TABLE OF CONTENTS
 
<TABLE>
<S>                                                                                       <C>
ACCUMULATION PLAN.......................................................................          2
INFORMATION ABOUT THE SPONSOR...........................................................          4
</TABLE>
 
APPENDIX A-- STANDARD & POOR'S EARNINGS AND DIVIDEND RANKINGS FOR COMMON STOCKS
 
APPENDIX B-- VALUE LINE RATINGS CRITERIA
 
                                      S-1
<PAGE>
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 capital
distributions or capital 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.
 
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
 
                                      S-2
<PAGE>
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
 

Nuveen Rittenhouse Growth 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.
 
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 nominally 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 dividend distributions or as a result of reinvestment of
Accumulation Fund
 
                                      S-3
<PAGE>
dividends. Any distribution of capital 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 capital only reinvestment to reinvestment of both
capital and dividends 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
 
    Since our founding in 1998, Nuveen has been synonymous with investments that
withstand the test of time. Today, we offer a broad range of investments
designed for mature investors whose portfolio is the principal source of their
ongoing financial security. More than 1.3 million investors have entrusted
Nuveen to help them maintain the lifestyle they currently enjoy.
 
    A value investing approach -- purchasing securities of strong companies and
communities that represent good long-term value -- is the cornerstone of
Nuveen's investment philosophy. It is a careful, long-term strategy that offers
the potential for attractive returns with moderated risk. Successful value
investing begins with in-depth research and a discerning eye for marketplace
opportunity. Nuveen's team of investment professionals is backed by the
discipline, resources and expertise of almost a century of investment
experience, including one of the most recognized research departments in the
industry.
 
    To meet the unique circumstances and financial planning needs of mature
investors, Nuveen offers a wide array of taxable and tax-free investment
products -- including equity and fixed-income mutual funds, unit trusts,
exchange-traded funds, customized asset management services and cash management
products.
 
    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
 
                                      S-4
<PAGE>
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 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. 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 office located in Chicago (333 West Wacker Drive). 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.
 
                                      S-5













<PAGE>
                                   APPENDIX A
                STANDARD & POOR'S EARNINGS AND DIVIDEND RANKINGS
                               FOR COMMON STOCKS
 
    The investment process involves assessment of various factors--such as
products and industry position, corporate resources and financial policy--with
results that make some common stocks more highly esteemed than others. In this
assessment, Standard & Poor's believes that earnings and dividend performance is
the end result of the interplay of these factors and that, over the long run,
the record of this performance has a considerable bearing on relative quality.
The rankings, however, do not pretend to reflect all of the factors, tangible or
intangible, that bear on stock quality.
 
    Relative quality of bonds or other debt, that is, degrees of protection for
principal and interest, called credit worthiness, cannot be applied to common
stocks, and therefore rankings are not to be confused with bond quality ratings
which are arrived at by a necessarily different approach.
 
    Growth and stability of earnings and dividends are deemed key elements in
establishing Standard & Poor's earnings and dividend rankings for common stocks.
It should be noted, however, that the process also takes into consideration
certain adjustments and modifications deemed desirable in establishing such
rankings.
 
    The major driver of these rankings is a computerized scoring system based on
per-share earnings and dividend records of the most recent ten years--a period
deemed long enough to measure significant time segments of secular growth, to
capture indications of basic changes in trend as they develop, and to encompass
the full peak-to-peak range of the business cycle. Basic scores are computed for
earnings and dividends, then adjusted as indicated by a set of predetermined
modifiers for growth, stability within long-term trend, and cyclicality.
Adjusted scores for earnings and dividends are then combined to yield a final
score.
 
    In addition, the ranking system makes allowance for the fact that, in
general, corporate size imparts certain recognized advantages from an investment
standpoint. Conversely, minimum size limits (as measured by corporate revenues)
are set for the various rankings, but the system provides for exceptions when
the score reflects an outstanding earnings-dividend record.
 
    The final score for each stock is measured against a scoring matrix
determined by analysis of the scores of a large and representative sample of
stocks. The range of scores in the array of this sample has been aligned with
the following ladder of rankings:
 
<TABLE>
<S>        <C>                    <C>        <C>                    <C>        <C>
A+         Highest                A-         Above Average          B-         Lower
A          High                   B+         Average                C          Lowest
                                  B          Below Average          D          In Reorganization
</TABLE>
 
    NR signifies no ranking because of insufficient data or because the stock is
not amenable to the ranking process.
 
    The rankings as determined above may be modified in some instances by
special considerations, such as natural disasters, massive strikes, and
non-recurring accounting adjustments.
 
    A ranking is not a forecast of future market price performance, but is
basically an appraisal of past performance of earnings and dividends, and
relative current standing. These rankings must not be used as market
recommendations; a high-scoring stock may at times be so overpriced as to
justify its sale, while a low-scoring stock may be attractively priced for
purchase. Rankings based upon earnings and dividend records are no substitute
for complete analysis. They cannot take into account potential effects on
management changes,
 
                                      A-1
<PAGE>
internal company policies not yet fully reflected in the earnings and dividend
record, public relations standing, recent competitive shifts, and a host of
other factors that may be relevant to market price or suitability.
 
                                      A-2
<PAGE>
                                   APPENDIX B
                          VALUE LINE RATINGS CRITERIA
 



                                      B-1
<PAGE>

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.


<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

Reliance Insurance Company                          $26,000,000
B 262 6895


<PAGE>

B.   This Registration Statement comprises the following papers and documents:
          The facing sheet
          The Prospectus
          The signatures
          Consents of Counsel
          The following exhibits:

1.1(a)  Copy of Standard Terms and Conditions of Trust for Nuveen Unit Trust, 
        Series 4 and certain subsequent Series, effective May 29, 1997 between 
        John Nuveen & Co. Incorporated, Depositor, and The Chase Manhattan 
        Bank, Trustee and Evaluator (incorporated by reference to Amendment 
        No. 1 to Form S-6 (File No. 333-25225) filed on behalf of Nuveen Unit 
        Trust, Series 4).

1.1(b)  Trust Indenture and Agreement (to be supplied by amendment).

1.2*    Copy of Certificate of Incorporation, as amended, of John Nuveen & 
        Co. Incorporated, Depositor.

1.3**   Copy of amendment of Certificate of Incorporation changing name of 
        Depositor to John Nuveen & Co. Incorporated.

2.1     Copy of Certificate of Ownership (included in Exhibit 1.1(a) and 
        incorporated herein by reference).

3.1     Opinion of counsel as to legality of securities being registered (to 
        be supplied by amendment).

3.2     Opinion of counsel as to Federal income tax status of securities 
        being registered (to be supplied by amendment).

3.3     Opinion of counsel as to New York income tax status of Securities 
        being registered (to be supplied by amendment).

3.4     Opinion of counsel as to advancement of funds by Trustee (to be 
        supplied by amendment).

4.2     Consent of The Chase Manhattan Bank (to be supplied by amendment).

4.4     Consent of Arthur Andersen LLP (to be supplied by amendment).

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).

_________

*    Incorporated by reference to Form N-8B-2 (File No. 811-1547) filed on 
     behalf of Nuveen Tax-Free Unit Trust, Series 16.

**   Incorporated by reference to Form N-8B-2 (File No. 811-2198) filed on 
     behalf of Nuveen Tax-Free Unit trust, Series 37.

                                        -2-

<PAGE>

C.   EXPLANATORY NOTE

     The Registration Statement will contain 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 with 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 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.

                                   -3-
<PAGE>


                                    SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the 
Registrant, Nuveen Unit Trust, Series 12, has duly caused this Registration 
Statement to be signed on its behalf by the undersigned thereunto duly 
authorized in the City of Chicago and State of Illinois on April 2, 1998.

                                    NUVEEN UNIT TRUST, SERIES 12
                                                  (Registrant)

                                    BY JOHN NUVEEN & CO. INCORPORATED
                                                   (Depositor)


                                   By            Larry W. Martin
                                      ---------------------------------
                                                 Vice President

                                   Attest        Karen L. Healy
                                          -----------------------------
                                               Assistant Secretary

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

       SIGNATURE                         TITLE*                    DATE

Timothy R. Schwertfeger     Chairman, Board of Directors  ) 
                            Chief Executive Officer       )
                            and Director                  )


Anthony T. Dean             President, Chief Operating    )  Larry W. Martin
                            Officer and Director          )  ---------------
                                                          )  Larry W. Martin
                                                          )  Attorney-in-Fact**
John P. Amboian             Chief Financial Officer and   )  April 2, 1998
                            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 for Messrs. Amboian, Renfftlen, Dean and 
     Schwertfeger were filed as Exhibit 6 to Form N-8B-2 (File No. 811-08103).

                                        -4-

<PAGE>

                          CONSENT OF CHAPMAN AND CUTLER

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

                  CONSENT OF THE CHASE MANHATTAN BANK

     The consent of The Chase Manhattan Bank to the use of its name in 
the Prospectus included in this Registration Statement will be filed 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 this Registration Statement will be filed as Exhibit 
3.3 to the Registration Statement.

                      CONSENT OF ARTHUR ANDERSEN LLP

     The consent of Arthur Andersen LLP to the use of its report and to the 
reference to such firm in the Prospectus included in this Registration 
Statement will be filed by amendment.

                                   -5-

<PAGE>

                               MEMORANDUM

     Re:    Nuveen Unit Trust, Series 12
            ----------------------------

     The list of securities comprising each trust of the fund, the 
evaluation, record and distribution dates and other changes pertaining 
specifically to the new series, such as size and number of units of the 
trusts in the fund and the statement of condition of the new fund will be 
filed by amendment.

                                  1940 ACT

                           FORMS N-8A AND N-8B-2

     Form N-8A and Form N-8B-2 were filed in respect of Nuveen Unit Trust 
Series 1 (File No. 811-08103).

                                  1933 ACT

                                THE INDENTURE

     The form of the proposed Trust Indenture and Agreement is expected to be 
in all respects consistent with the form of Trust Indenture and Agreement 
dated May 29, 1997 relative to Nuveen Unit Trust, Series 4.

Chicago, Illinois
April 2, 1998




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