NUVEEN TAX EXEMPT UNIT TRUST SERIES 747
497, 1994-08-22
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<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     MARYLAND
     TRUST 298
              (MARYLAND TRADITIONAL TRUST 298)
 
            Estimated Current Return
            5.60% to 5.83%
            as of 08/18/94
 
            Estimated Long Term Return
            5.69% to 5.91%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds
                  Cusip:
                  67101L 647 Monthly Payment Option
                  67101L 654 Quarterly Payment Option
                  67101L 662 Semi-Annual Payment Option
 
                  Registered in Maryland
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--MARYLAND TRADITIONAL TRUST 298
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT AUGUST 19, 1994
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  105,000    Community Development Administration, Department of Housing        2003 at 102          AAA           Aaa
                  and Community Development, State of Maryland, Multi-Family
                  Housing Revenue Bonds (Insured Mortgage Loans), 1993
                  Series D, 6.05% Due 5/15/24. (MBIA Insured.)
     495,000    Maryland Health and Higher Educational Facilities Authority,       2003 at 100          AAA           Aaa
                  Project and Refunding Revenue Bonds, Baltimore County
                  General Hospital Issue, Series 1993 (Northwest Hospital
                  Center, Inc.), 5.25% Due 7/1/13. (AMBAC Insured.)
     500,000    Maryland Health and Higher Educational Facilities Authority,       2003 at 102           A             A
                  Project and Refunding Revenue Bonds, Peninsula Regional
                  Medical Center Issue, Series 1993, 5.00% Due 7/1/23.
                  (Original issue discount bonds delivered on or about
                  October 28, 1993 at a price of 93.41% of principal
                  amount.)
     500,000    Anne Arundel County, Maryland, Pollution Control Revenue           2004 at 102           A            A2
                  Refunding Bonds (Baltimore Gas and Electric Company
                  Project), Series 1994, 6.00% Due 4/1/24.
     500,000    City of Baltimore, Maryland (Mayor and City Council of             2004 at 100          AAA           Aaa
                  Baltimore), Convention Center Revenue Bonds, Series 1994,
                  6.15% Due 9/1/19. (When issued.) (FGIC Insured.)
     500,000    Mayor and City Council of Baltimore (Maryland), Project            2002 at 102          AAA           Aaa
                  Revenue Bonds (Baltimore City Parking System Facilities),
                  Series 1992A, 6.25% Due 7/1/21. (FGIC Insured.)
     500,000    Howard County, Maryland, Mortgage Revenue Refunding Bonds,         2004 at 102          AAA           Aaa
                  Series 1994A (Beech's Farm Apartments Project-FHA Insured
                  Mortgage Loan), 6.50% Due 7/1/24. (MBIA Insured.)
     400,000    Washington Suburban Sanitary District, Maryland, Water             2004 at 102          AA            Aa1
                  Supply Bonds of 1994, 5.50% Due 6/1/13. (General
                  Obligation Bonds.)
  ----------
  $3,500,000
  ----------
  ----------
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION
Sales charge/volume discount applies on all concurrent purchases of any Nuveen
trust units. Estimated Current Return equals net income divided by offering
price. Estimated Long Term Return represents an average of the yields to
maturity (or call) of the Bonds in the Trust adjusted to reflect expenses and
sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                          Estimated Current Return (2)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $    100.03          5.60%            5.63%            5.65%
500-999                 50,000-99,999   4.75           99.87          5.61             5.64             5.66
1,000-2,499           100,000-249,999   4.50           99.61          5.63             5.66             5.68
2,500-4,999           250,000-499,999   4.25           99.35          5.64             5.67             5.69
5,000-9,999           500,000-999,999   3.50           98.58          5.68             5.72             5.74
10,000-24,999     1,000,000-2,499,999   3.00           98.07          5.71             5.75             5.77
25,000-49,999     2,500,000-4,999,999   2.50           97.57          5.74             5.78             5.80
50,000 and over    5,000,000 and over   2.00           97.07          5.77             5.81             5.83
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $    100.03          5.69%            5.72%            5.74%
500-999                 50,000-99,999   4.75           99.87          5.69             5.72             5.74
1,000-2,499           100,000-249,999   4.50           99.61          5.71             5.74             5.76
2,500-4,999           250,000-499,999   4.25           99.35          5.72             5.75             5.77
5,000-9,999           500,000-999,999   3.50           98.58          5.77             5.80             5.82
10,000-24,999     1,000,000-2,499,999   3.00           98.07          5.80             5.83             5.85
25,000-49,999     2,500,000-4,999,999   2.50           97.57          5.83             5.86             5.88
50,000 and over    5,000,000 and over   2.00           97.07          5.86             5.89             5.91
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to Date of Deposit. The estimated
    current return for purchases made on such date will be as shown, as long as
    the portfolio size and composition remain the same.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                          Normal
                                                                                                      Distributions
Maryland Traditional Trust                        1994                             1995                 per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................       10/1           11/1            2/1            5/1
Distribution Date.....................      10/15          11/15           2/15           5/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .6535(1)                                                  $  5.6036
                                                          --------  $.4668 every month  --------
Quarterly Distribution Plan...........  $   .6535(1)   $   .4695(2)   $  1.4085      $  1.4085        $  5.6356
Semi-Annual Distribution Plan.........  $   .6535(1)   $   .4710(3)                  $  2.8260        $  5.6546
- --------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 1-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.11 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01556 per unit per day.
Consequently, on the first Record Date (10/01/94), accrued interest will total
$0.6535 per unit for the 42-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 10/01/94 is $.6535 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01556              Quarterly - $0.01565
                             Semi-Annual - $0.01570
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
 
                                                          747
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 25.7 years.
The first bond is scheduled to mature in June, 2013, with the last bond maturity
being July, 2024.
 
- -------------------------------------------------------
 
QUALITY OF PORTFOLIO AS RATED BY
STANDARD & POOR'S CORPORATION
OR MOODY'S INVESTORS SERVICES
- -------------------------------------------------------
 
<TABLE>
<S>                       <C>                    <C>
Rating                    Percent of Portfolio
Category                  Par Value
- --------------------------------------------------------------------
AAA                           60%
AA                            11
A                             29
                             ---
                             100%
</TABLE>
 
- -------------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------------
 
NO CHARGE FOR REDEMPTION   The Trustee, United States Trust Company of New York,
will redeem units at net asset value. In addition, John Nuveen & Co.
Incorporated intends to maintain a secondary market for this Nuveen Tax-Exempt
Unit Trust. Inasmuch as all securities investments are subject to market price
fluctuation, net asset value at the time of redemption could be more or less
than the initial investment.
 
- -------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
 
- -------------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     SHORT INTERMEDIATE
     INSURED
     TRUST 34
 
            Estimated Current Return
            First
            Year: 4.48% to 4.60%
            Subsequent
            Years: 4.50% to 4.62%
            as of 08/18/94
 
            Estimated Long Term Return
            4.59% to 4.71%
             75,000 units in a
             diversified $7,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  6710A0 312 Monthly Payment Option
                  6710A0 320 Quarterly Payment Option
                  6710A0 338 Semi-Annual Payment Option
 
                  Registered in all states
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, SHORT INTERMEDIATE INSURED TRUST 34
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT AUGUST 19, 1994
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  750,000    California State Various Purpose General Obligation Bonds,         No Optional          AAA           Aaa
                  5.00% Due 8/1/99. (When issued.)                                    Call
     750,000    Castaic Lake Water Agency (California), Refunding Revenue          No Optional          AAA           Aaa
                  Certificates of Participation (Water System Improvement             Call
                  Projects), Series 1994A, 5.00% Due 8/1/99. (When issued.)
     750,000    City of Tampa, Florida, Allegany Health System Revenue             No Optional          AAA           Aaa
                  Bonds, St. Joseph's Hospital, Inc. Issue, Series 1993,              Call
                  4.15% Due 12/1/99.
     125,000    The Illinois State Toll Highway Authority, Toll Highway            No Optional          AAA           Aaa
                  Refunding Revenue Bonds, 1993 Series A, 4.50% Due 1/1/00.           Call
     750,000    Carmel High School Building Corporation (Indiana), First           No Optional          AAA           Aaa
                  Mortgage Refunding Bonds, Series 1994, 4.15% Due 1/15/99.           Call
                  (General Obligation Bonds.)
     665,000    Massachusetts Bay Transportation Authority, General                No Optional          AAA           Aaa
                  Transportation System Bonds, 1993 Series A Refunding,               Call
                  4.75% Due 3/1/00. (General Obligation Bonds.)
     500,000    The Commonwealth of Massachusetts, General Obligation Bonds,       No Optional          AAA           Aaa
                  Consolidated Loan of 1994, Series B, 5.00% Due 8/1/99.              Call
     210,000    County of Churchill, Nevada, Health Care Facilities Revenue        No Optional          AAA           Aaa
                  Bonds (Western Health Network, Inc.), Series 1994A, 5.00%           Call
                  Due 1/1/99. (When issued.)
     750,000    Town of Islip, Suffolk County, New York, Public Improvement        No Optional          AAA           Aaa
                  Bonds, 1994, 5.30% Due 8/15/99. (General Obligation                 Call
                  Bonds.) (When issued.)
     750,000    The City of New York (New York), General Obligation Bonds,         No Optional          AAA           Aaa
                  Fiscal 1995 Series A, 5.25% Due 8/1/99.                             Call
     750,000    State of Ohio, Water Development Revenue Refunding Bonds,          No Optional          AAA           Aaa
                  1992 Clean Water Series, 5.00% Due 12/1/99.                         Call
     750,000    The School District of Philadelphia, Pennsylvania, General         No Optional          AAA           Aaa
                  Obligation Refunding Bonds, Series A of 1993, 4.70% Due             Call
                  7/1/99.
  ----------
  $7,500,000
  ----------
  ----------
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION
Sales charge/volume discount applies on all concurrent purchases of any Nuveen
trust units. Estimated Current Return equals net income divided by offering
price. Estimated Long Term Return represents an average of the yields to
maturity (or call) of the Bonds in the Trust adjusted to reflect expenses and
sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                              Estimated Current Return (2)
          AMOUNT PURCHASED                         Public      -----------------------------------------------------------
- -------------------------------------  Sales      Offering         Monthly           Quarterly            Semi-Annual
     Units              Dollars        Charge     Price (1)        Payment            Payment               Payment
- ----------------  -------------------  ------    -----------   ---------------    ---------------    ---------------------
<S>               <C>                  <C>       <C>           <C>       <C>      <C>       <C>      <C>       <C>
50-499                 $5,000-$49,999   3.00 %   $    102.62     (4.48%)  4.50%     (4.51%)  4.53%     (4.53%)  4.55%
500-999                 50,000-99,999   2.80          102.41     (4.49)   4.51      (4.52)   4.54      (4.54)   4.56
1,000-2,499           100,000-249,999   2.60          102.20     (4.50)   4.52      (4.53)   4.55      (4.55)   4.57
2,500-4,999           250,000-499,999   2.35          101.94     (4.51)   4.53      (4.54)   4.56      (4.56)   4.58
5,000-9,999           500,000-999,999   2.10          101.68     (4.52)   4.54      (4.55)   4.58      (4.57)   4.59
10,000-24,999     1,000,000-2,499,999   1.85          101.42     (4.53)   4.56      (4.56)   4.59      (4.58)   4.61
25,000-49,999     2,500,000-4,999,999   1.80          101.36     (4.54)   4.56      (4.57)   4.59      (4.59)   4.61
50,000 and over    5,000,000 and over   1.50          101.06     (4.55)   4.57      (4.58)   4.60      (4.60)   4.62
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   3.00 %   $    102.62          4.59%            4.62%            4.64%
500-999                 50,000-99,999   2.80          102.41          4.60             4.63             4.65
1,000-2,499           100,000-249,999   2.60          102.20          4.61             4.64             4.66
2,500-4,999           250,000-499,999   2.35          101.94          4.62             4.65             4.67
5,000-9,999           500,000-999,999   2.10          101.68          4.63             4.66             4.68
10,000-24,999     1,000,000-2,499,999   1.85          101.42          4.64             4.67             4.69
25,000-49,999     2,500,000-4,999,999   1.80          101.36          4.65             4.67             4.69
50,000 and over    5,000,000 and over   1.50          101.06          4.66             4.69             4.71
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to the Date of Deposit. Figures in
    brackets represent the current return. The first year's estimated current
    returns are slightly lower than those for subsequent years because a portion
    of the monies received in the first year only will be treated as a return of
    principal due to the inclusion in the portfolio of "when issued" or other
    Bonds having delivery dates after the date of settlement for a purchase made
    on the Date of Deposit.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                          Normal
                                                                                                      Distributions
Short Intermediate Insured Trust                  1994                             1995                 per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................       10/1           11/1            2/1            5/1
Distribution Date.....................      10/15          11/15           2/15           5/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5388(1)                                                  $  4.6202
                                                          --------  $.3849 every month  --------
Quarterly Distribution Plan...........  $   .5388(1)   $   .3876(2)   $  1.1628      $  1.1628        $  4.6522
Semi-Annual Distribution Plan.........  $   .5388(1)   $   .3891(3)                  $  2.3346        $  4.6712
- --------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 1-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.09 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01283 per unit per day.
Consequently, on the first Record Date (10/01/94), accrued interest will total
$0.5388 per unit for the 42-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 10/01/94 is $.5388 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01283              Quarterly - $0.01292
                             Semi-Annual - $0.01297
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
<PAGE>
- -------------------------------------------------
 
DIVERSIFICATION OF PORTFOLIO INCOME
 
There are 12 Tax-exempt bond issues in this trust; this diversified portfolio
yields current income from issuers in 9 states.
- -------------------------------------------------------
<TABLE>
<CAPTION>
                   Percent
                   of Total
                   Income
<S>                    <C>        <C>
- ------------------------
                                  %
California                  20.7
Florida                      8.6
Illinois                     1.6
Indiana                      8.6
Massachusetts               15.6
 
<CAPTION>
                   Percent
                   of Total
                   Income
- ------------------------
<S>                    <C>        <C>
                                  %
Nevada                       2.9
New York                    21.9
Ohio                        10.4
Pennsylvania                 9.7
</TABLE>
 
- -------------------------------------------------
 
AVERAGE PORTFOLIO LIFE The average maturity
of portfolio bonds is 5.0 years.
 
<TABLE>
<CAPTION>
Year Bonds Mature                        Amount      Percent
- -------------------------------------  ----------  -----------
<S>                                    <C>         <C>
1999.................................       6,710        89.5%
2000.................................         790        10.5
</TABLE>
 
- -------------------------------------------------
 
BONDS INSURED BY MBIA   Each bond in this Nuveen Insured series has been
insured* by the Municipal Bond Investors Assurance Corporation, which guarantees
timely payments of principal and interest. Premium payments have been fully paid
by the Date of Deposit.
 
- -------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------
 
* Insurance relates specifically to the bonds and not to the units or to the
  market value of units. Terms of the insurance are more fully described in the
  prospectus. No representation is made as to the insurer's ability to meet its
  commitments. See Section 5 of the prospectus for details.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
 
747
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     CALIFORNIA
     INSURED
     TRUST 230
 
            Estimated Current Return
            First
            Year: 5.62% to 5.85%
            Subsequent
            Years: 5.65% to 5.87%
            as of 08/18/94
 
            Estimated Long Term Return
            5.72% to 5.94%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67064U 378 Monthly Payment Option
                  67064U 386 Quarterly Payment Option
                  67064U 394 Semi-Annual Payment Option
 
                  Registered in California
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, CALIFORNIA INSURED TRUST 230
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT AUGUST 19, 1994
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  515,000    California Health Facilities Financing Authority, Kaiser           2003 at 102          AAA           Aaa
                  Permanente, Revenue Bonds, 1993 Series C, 5.60% Due
                  5/1/33.
     500,000    State Public Works Board of the State of California, Lease         2004 at 102          AAA           Aaa
                  Revenue Bonds (Department of Corrections), 1993 Series E
                  (California State Prison-Madera County II), 5.50% Due
                  6/1/19.
     510,000    California Statewide Communities Development Authority,            2003 at 102          AAA           Aaa
                  Certificates of Participation, Sutter Health Obligated
                  Group, 5.50% Due 8/15/23.
     500,000    Castaic Lake Water Agency (California), Refunding Revenue          2004 at 102          AAA           Aaa
                  Certificates of Participation (Water System Improvement
                  Projects), Series 1994A, 6.30% Due 8/1/20. (When issued.)
     425,000    Los Angeles County Metropolitan Transportation Authority           2003 at 102          AAA           Aaa
                  (California), Proposition A, Sales Tax Revenue Refunding
                  Bonds, Series 1993-A, 5.625% Due 7/1/18.
     525,000    Sacramento Municipal Utility District (California), Electric       2004 at 102          AAA           Aaa
                  Revenue Bonds, 1994 Series I, 6.00% Due 1/1/24. (When
                  issued.)
     525,000    Commonwealth of Puerto Rico, Public Improvement Bonds of           2004 at 101          AAA           Aaa
                  1994 (General Obligation Bonds), 6.45% Due 7/1/17.                   1/2
  ----------
  $3,500,000
  ----------
  ----------
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION
Sales charge/volume discount applies on all concurrent purchases of any Nuveen
trust units. Estimated Current Return equals net income divided by offering
price. Estimated Long Term Return represents an average of the yields to
maturity (or call) of the Bonds in the Trust adjusted to reflect expenses and
sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                              Estimated Current Return (2)
          AMOUNT PURCHASED                         Public      -----------------------------------------------------------
- -------------------------------------  Sales      Offering         Monthly           Quarterly            Semi-Annual
     Units              Dollars        Charge     Price (1)        Payment            Payment               Payment
- ----------------  -------------------  ------    -----------   ---------------    ---------------    ---------------------
<S>               <C>                  <C>       <C>           <C>       <C>      <C>       <C>      <C>       <C>
50-499                 $5,000-$49,999   4.90 %   $     99.67     (5.62%)  5.65%     (5.66%)  5.68%     (5.68%)  5.70%
500-999                 50,000-99,999   4.75           99.52     (5.63)   5.66      (5.67)   5.69      (5.68)   5.71
1,000-2,499           100,000-249,999   4.50           99.26     (5.65)   5.67      (5.68)   5.70      (5.70)   5.72
2,500-4,999           250,000-499,999   4.25           99.00     (5.66)   5.69      (5.70)   5.72      (5.71)   5.74
5,000-9,999           500,000-999,999   3.50           98.23     (5.71)   5.73      (5.74)   5.76      (5.76)   5.78
10,000-24,999     1,000,000-2,499,999   3.00           97.72     (5.74)   5.76      (5.77)   5.79      (5.79)   5.81
25,000-49,999     2,500,000-4,999,999   2.50           97.22     (5.77)   5.79      (5.80)   5.82      (5.82)   5.84
50,000 and over    5,000,000 and over   2.00           96.72     (5.80)   5.82      (5.83)   5.85      (5.85)   5.87
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $     99.67          5.72%            5.74%            5.76%
500-999                 50,000-99,999   4.75           99.52          5.72             5.75             5.77
1,000-2,499           100,000-249,999   4.50           99.26          5.74             5.77             5.79
2,500-4,999           250,000-499,999   4.25           99.00          5.75             5.78             5.80
5,000-9,999           500,000-999,999   3.50           98.23          5.80             5.83             5.85
10,000-24,999     1,000,000-2,499,999   3.00           97.72          5.83             5.86             5.88
25,000-49,999     2,500,000-4,999,999   2.50           97.22          5.86             5.89             5.91
50,000 and over    5,000,000 and over   2.00           96.72          5.89             5.92             5.94
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to the Date of Deposit. Figures in
    brackets represent the current return. The first year's estimated current
    returns are slightly lower than those for subsequent years because a portion
    of the monies received in the first year only will be treated as a return of
    principal due to the inclusion in the portfolio of "when issued" or other
    Bonds having delivery dates after the date of settlement for a purchase made
    on the Date of Deposit.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                          Normal
                                                                                                      Distributions
California Insured Trust                          1994                             1995                 per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................       10/1           11/1            2/1            5/1
Distribution Date.....................      10/15          11/15           2/15           5/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .6568(1)                                                  $  5.6306
                                                          --------  $.4692 every month  --------
Quarterly Distribution Plan...........  $   .6568(1)   $   .4716(2)   $  1.4148      $  1.4148        $  5.6626
Semi-Annual Distribution Plan.........  $   .6568(1)   $   .4734(3)                  $  2.8404        $  5.6816
- --------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 1-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.11 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01564 per unit per day.
Consequently, on the first Record Date (10/01/94), accrued interest will total
$0.6568 per unit for the 42-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 10/01/94 is $.6568 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01564              Quarterly - $0.01572
                             Semi-Annual - $0.01578
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
 
                                                          747
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 27.9 years.
The first bond is scheduled to mature in July, 2017, with the last bond maturity
being May, 2033.
 
- -------------------------------------------------------
 
BONDS INSURED BY MBIA   Each bond in this Nuveen Insured series has been
insured* by the Municipal Bond Investors Assurance Corporation, which guarantees
timely payments of principal and interest. Premium payments have been fully paid
by the Date of Deposit.
 
- -------------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------------
 
NO CHARGE FOR REDEMPTION   The Trustee, United States Trust Company of New York,
will redeem units at net asset value. In addition, John Nuveen & Co.
Incorporated intends to maintain a secondary market for this Nuveen Tax-Exempt
Unit Trust. Inasmuch as all securities investments are subject to market price
fluctuation, net asset value at the time of redemption could be more or less
than the initial investment.
 
- -------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
 
- -------------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------------
 
* Insurance relates specifically to the bonds and not to the units or to the
  market value of units. Terms of the insurance are more fully described in the
  prospectus. No representation is made as to the insurer's ability to meet its
  commitments. See Section 5 of the prospectus for details.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
<PAGE>
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     FLORIDA
     INSURED
     TRUST 195
 
            Estimated Current Return
            5.54% to 5.76%
            as of 08/18/94
 
            Estimated Long Term Return
            5.63% to 5.86%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  6706H3 432 Monthly Payment Option
                  6706H3 440 Quarterly Payment Option
                  6706H3 457 Semi-Annual Payment Option
 
                  Registered in Florida
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, FLORIDA INSURED TRUST 195
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT AUGUST 19, 1994
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  500,000    State of Florida, Full Faith and Credit, State Board of            2004 at 101          AAA           Aaa
                  Education, Public Education Capital Outlay Bonds, Series
                  1994A, 6.10% Due 6/1/24. (General Obligation Bonds.) (When
                  issued.)
     500,000    Citrus County, Florida, Pollution Control Refunding Revenue        2002 at 102          AAA           Aaa
                  Bonds, Series 1992 B (Florida Power Corporation Crystal
                  River Power Plant Project), 6.35% Due 2/1/22.
     500,000    Hernando County, Florida, Capital Improvement Refunding            2003 at 102          AAA           Aaa
                  Revenue Bonds, Series 1993, 5.75% Due 2/1/21.
     500,000    Jacksonville Electric Authority (Jacksonville, Florida), St.       2002 at 101          AAA           Aaa
                  Johns River Power Park System, Refunding Revenue Bonds
                  Issue Two, Series Nine, 5.25% Due 10/1/21.
     500,000    Manatee County Port Authority (Florida), Revenue Refunding         2003 at 102          AAA           Aaa
                  and Improvement Bonds, Series 1993A, 5.25% Due 10/1/13.
     500,000    Orange County, Florida, Tourist Development Tax Revenue            2004 at 102          AAA           Aaa
                  Bonds, Series 1994B, 6.00% Due 10/1/24.
     500,000    City of Tampa, Florida, Allegany Health System Revenue             2003 at 102          AAA           Aaa
                  Bonds, St. Joseph's Hospital, Inc. Issue, Series 1993,
                  5.125% Due 12/1/23. (Original issue discount bonds
                  delivered on or about January 4, 1994 at a price of
                  94.522% of principal amount.)
  ----------
  $3,500,000
  ----------
  ----------
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION
Sales charge/volume discount applies on all concurrent purchases of any Nuveen
trust units. Estimated Current Return equals net income divided by offering
price. Estimated Long Term Return represents an average of the yields to
maturity (or call) of the Bonds in the Trust adjusted to reflect expenses and
sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                          Estimated Current Return (2)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $     98.65          5.54%            5.57%            5.59%
500-999                 50,000-99,999   4.75           98.50          5.55             5.58             5.60
1,000-2,499           100,000-249,999   4.50           98.24          5.56             5.59             5.61
2,500-4,999           250,000-499,999   4.25           97.98          5.58             5.61             5.63
5,000-9,999           500,000-999,999   3.50           97.22          5.62             5.65             5.67
10,000-24,999     1,000,000-2,499,999   3.00           96.72          5.65             5.68             5.70
25,000-49,999     2,500,000-4,999,999   2.50           96.23          5.68             5.71             5.73
50,000 and over    5,000,000 and over   2.00           95.73          5.71             5.74             5.76
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $     98.65          5.63%            5.67%            5.69%
500-999                 50,000-99,999   4.75           98.50          5.64             5.67             5.69
1,000-2,499           100,000-249,999   4.50           98.24          5.65             5.69             5.71
2,500-4,999           250,000-499,999   4.25           97.98          5.67             5.70             5.72
5,000-9,999           500,000-999,999   3.50           97.22          5.71             5.75             5.77
10,000-24,999     1,000,000-2,499,999   3.00           96.72          5.74             5.78             5.80
25,000-49,999     2,500,000-4,999,999   2.50           96.23          5.77             5.81             5.83
50,000 and over    5,000,000 and over   2.00           95.73          5.80             5.84             5.86
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to Date of Deposit. The estimated
    current return for purchases made on such date will be as shown, as long as
    the portfolio size and composition remain the same.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                                                          Normal
                                                                                                      Distributions
Florida Insured Trust                             1994                             1995                 per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................       10/1           11/1            2/1            5/1
Distribution Date.....................      10/15          11/15           2/15           5/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .6371(1)                                                  $  5.4629
                                                          --------  $.4551 every month  --------
Quarterly Distribution Plan...........  $   .6371(1)   $   .4578(2)   $  1.3734      $  1.3734        $  5.4949
Semi-Annual Distribution Plan.........  $   .6371(1)   $   .4593(3)                  $  2.7558        $  5.5139
- --------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The second distribution under the quarterly distribution plan represents a 1-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 1-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.11 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01517 per unit per day.
Consequently, on the first Record Date (10/01/94), accrued interest will total
$0.6371 per unit for the 42-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 10/01/94 is $.6371 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01517              Quarterly - $0.01526
                             Semi-Annual - $0.01531
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
 
                                                          747
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 27.0 years.
The first bond is scheduled to mature in October, 2013, with the last bond
maturity being October, 2024.
 
- -------------------------------------------------------
 
BONDS INSURED BY MBIA   Each bond in this Nuveen Insured series has been
insured* by the Municipal Bond Investors Assurance Corporation, which guarantees
timely payments of principal and interest. Premium payments have been fully paid
by the Date of Deposit.
 
- -------------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------------
 
NO CHARGE FOR REDEMPTION   The Trustee, United States Trust Company of New York,
will redeem units at net asset value. In addition, John Nuveen & Co.
Incorporated intends to maintain a secondary market for this Nuveen Tax-Exempt
Unit Trust. Inasmuch as all securities investments are subject to market price
fluctuation, net asset value at the time of redemption could be more or less
than the initial investment.
 
- -------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
 
- -------------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------------
 
* Insurance relates specifically to the bonds and not to the units or to the
  market value of units. Terms of the insurance are more fully described in the
  prospectus. No representation is made as to the insurer's ability to meet its
  commitments. See Section 5 of the prospectus for details.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
<PAGE>
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.


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