NUVEEN TAX EXEMPT UNIT TRUST SERIES 714
497, 1994-01-28
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<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     CONNECTICUT
     TRUST 262
              (CONNECTICUT TRADITIONAL TRUST 262)
 
            Estimated Current Return
            4.71% to 4.85%
            as of 01/26/94
 
            Estimated Long Term Return
            4.75% to 4.89%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds
                  Cusip:
                  67094E 345 Monthly Payment Option
                  67094E 352 Quarterly Payment Option
                  67094E 360 Semi-Annual Payment Option
 
                  Registered in Connecticut
                    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           Los Angeles
New York, New York 10022      Philadelphia
Telephone: 212.207.2000       Phoenix
                              San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--CONNECTICUT TRADITIONAL TRUST 262
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT JANUARY 27, 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>
  --------------------------------------------------------------------------------------------------------------------------
  $  250,000    State of Connecticut, General Obligation Capital                   No Optional          AA-           Aa
                  Appreciation Bonds (College Savings Plan, 1993 Series B),           Call
                  0.00% Due 12/1/11. (Original issue discount bonds
                  delivered on or about November 16, 1993 at a price of
                  39.259% of principal amount.)
     500,000    State of Connecticut Health and Educational Facilities             2003 at 102          AAA           Aaa
                  Authority Revenue Bonds, Lawrence and Memorial Hospital
                  Issue, Series D, 5.00% Due 7/1/22. (Original issue
                  discount bonds delivered on or about December 29, 1993 at
                  a price of 94.491% of principal amount.)(MBIA Insured.)
     525,000    State of Connecticut Health and Educational Facilities             2003 at 102          AAA           Aaa
                  Authority, Revenue Bonds, Saint Francis Hospital and
                  Medical Center Issue, Series C, 5.00% Due 7/1/23. (FGIC
                  Insured.)
     500,000    State of Connecticut, Special Tax Obligation Bonds,                No Optional          AA-           A1
                  Transportation Infrastructure Purposes, 1992 Series B,              Call
                  6.125% Due 9/1/12.
     115,000    State of Connecticut, Clean Water Fund Revenue Bonds, 1992         2002 at 102          AA            Aa
                  Series, 6.125% Due 2/1/12.
     400,000    Town of Cheshire, Connecticut, General Obligation Bonds,           2003 at 102          --            Aa
                  Issue of 1993, 5.25% Due 8/15/12.
     525,000    South Central Connecticut Regional Water Authority, Water          2003 at 102          AAA           Aaa
                  System Revenue Bonds, Eleventh Series, 5.75% Due 8/1/12.
                  (FGIC Insured.)
     220,000    Town of Westbrook, Connecticut, General Obligation Bonds,          No Optional          AAA           Aaa
                  5.00% Due 6/15/13. (FGIC Insured.)                                  Call
     465,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2003 at 101          AAA           Aaa
                  Bonds, Series 1993 (General Obligation Bonds.), 5.25% Due            1/2
                  7/1/18. (Original issue discount bonds delivered on or
                  about July 15, 1993 at a price of 93.414% of principal
                  amount.)(MBIA Insured.)
  ----------
  $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>
50-999                 $5,000-$99,999   4.90 %   $    102.94          4.71%            4.74%            4.75%
1,000-2,499           100,000-249,999   4.50          102.51          4.73             4.76             4.77
2,500-4,999           250,000-499,999   4.25          102.25          4.74             4.77             4.79
5,000-9,999           500,000-999,999   3.50          101.45          4.77             4.81             4.82
10,000 and over    1,000,000 and over   3.00          100.93          4.80             4.83             4.85
</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>
50-999                 $5,000-$99,999   4.90 %   $    102.94          4.75%            4.77%            4.79%
1,000-2,499           100,000-249,999   4.50          102.51          4.77             4.79             4.81
2,500-4,999           250,000-499,999   4.25          102.25          4.78             4.80             4.82
5,000-9,999           500,000-999,999   3.50          101.45          4.82             4.84             4.86
10,000 and over    1,000,000 and over   3.00          100.93          4.84             4.87             4.89
</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
Connecticut Traditional Trust                                     1994                              per Year +
<S>                                     <C>            <C>            <C>            <C>        <C>
- ------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        4/1            5/1            8/1           11/1
Distribution Date.....................       4/15           5/15           8/15          11/15
- ----------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .2088(1)                                              $  4.8437
                                                        --------  $.4036 every month  --------
Quarterly Distribution Plan...........  $   .2088(1)   $   .4063(2)   $  1.2189      $  1.2189    $  4.8757
Semi-Annual Distribution Plan.........  $   .2088(1)   $   .4078(3)                  $  2.4473    $  4.8947
- ----------------------------------------------------------------------------------------------------------------
<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.
(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 $.08 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 $.01345 per unit per day.
Consequently, on the first Record Date (04/01/94), accrued interest will total
$0.8608 per unit for the 64-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 04/01/94 is $.2088, and the
remaining $.6520 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01345              Quarterly - $0.01354
                             Semi-Annual - $0.01360
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.
 
- --------------------------------------------------------------------------------
 
                                                          714
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 22.4 years.
The first bond is scheduled to mature in December, 2011, with the last bond
maturity being July, 2023.
 
- -------------------------------------------------
 
QUALITY OF PORTFOLIO AS RATED BY
STANDARD & POOR'S CORPORATION
OR MOODY'S INVESTORS SERVICES
- -------------------------------------------------
 
<TABLE>
<CAPTION>
       Rating          Percent of Portfolio
      Category              Par Value
<S>                    <C>                   <C>
- -------------------------------------------------------------
AAA                         64%
AA                          36
                           ---
                           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.
 
- -------------------------------------------------
 
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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     CALIFORNIA
     INSURED
     TRUST 220
 
            Estimated Current Return
            4.88% to 5.02%
            as of 01/26/94
 
            Estimated Long Term Return
            4.94% to 5.08%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67101G 853 Monthly Payment Option
                  67101G 861 Quarterly Payment Option
                  67101G 879 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           Los Angeles
New York, New York 10022      Philadelphia
Telephone: 212.207.2000       Phoenix
                              San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, CALIFORNIA INSURED TRUST 220
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT JANUARY 27, 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>
  --------------------------------------------------------------------------------------------------------------------------
  $  525,000    California Health Facilities Financing Authority, Insured          2004 at 102          AAA           Aaa
                  Health Facility Refunding Revenue Bonds (Catholic
                  Healthcare West), 1994 Series B, 5.00% Due 7/1/21.
                  (Original issue discount bonds delivered on or about
                  January 27, 1994 at a price of 93.359% of principal
                  amount.)
     525,000    State Public Works Board of the State of California, Lease         2003 at 102          AAA           Aaa
                  Revenue Bonds (Department of Corrections), 1993 Series B
                  (California State Prison-Fresno County, Coalinga), 5.375%
                  Due 12/1/19. (Original issue discount bonds delivered on
                  or about April 14, 1993 at a price of 94.522% of principal
                  amount.)
     525,000    California Statewide Communities Development Authority,            2004 at 100          AAA           Aaa
                  Insured Revenue Certificates of Participation (Childrens
                  Hospital of Los Angeles), Series 1993, 4.75% Due 6/1/21.
                  (Original issue discount bonds delivered on or about
                  December 23, 1993 at a price of 90.749% of principal
                  amount.)
     200,000    California Statewide Communities Development Authority,            2003 at 102          AAA           Aaa
                  Certificates of Participation, Sutter Health Obligated
                  Group, 5.50% Due 8/15/23.
     525,000    The Regents of the University of California, University of         2003 at 102          AAA           Aaa
                  California Housing System Revenue Bonds, Series A, 5.00%
                  Due 11/1/13. (Original issue discount bonds delivered on
                  or about June 29, 1993 at a price of 92.192% of principal
                  amount.)
     525,000    Los Angeles Convention and Exhibition Center Authority             2003 at 102          AAA           Aaa
                  (California), Lease Revenue Bonds, 1993 Refunding Series
                  A, 5.125% Due 8/15/21. (Original issue discount bonds
                  delivered on or about September 14, 1993 at a price of
                  94.949% of principal amount.)
     525,000    Department of Water and Power of The City of Los Angeles,          2003 at 102          AAA           Aaa
                  California, Electric Plant Refunding Revenue Bonds, Second
                  Issue of 1993, 5.40% Due 11/15/31.
     150,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2003 at 101          AAA           Aaa
                  Bonds, Series 1993 (General Obligation Bonds.), 5.25% Due            1/2
                  7/1/18. (Original issue discount bonds delivered on or
                  about July 15, 1993 at a price of 93.414% 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>
50-999                 $5,000-$99,999   4.90 %   $    101.77          4.88%            4.91%            4.93%
1,000-2,499           100,000-249,999   4.50          101.34          4.90             4.93             4.95
2,500-4,999           250,000-499,999   4.25          101.08          4.91             4.94             4.96
5,000-9,999           500,000-999,999   3.50          100.29          4.95             4.98             5.00
10,000 and over    1,000,000 and over   3.00           99.77          4.97             5.01             5.02
</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>
50-999                 $5,000-$99,999   4.90 %   $    101.77          4.94%            4.96%            4.98%
1,000-2,499           100,000-249,999   4.50          101.34          4.96             4.99             5.00
2,500-4,999           250,000-499,999   4.25          101.08          4.97             5.00             5.02
5,000-9,999           500,000-999,999   3.50          100.29          5.01             5.04             5.06
10,000 and over    1,000,000 and over   3.00           99.77          5.03             5.06             5.08
</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
California Insured Trust                                          1994                              per Year +
<S>                                     <C>            <C>            <C>            <C>        <C>
- ------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        4/1            5/1            8/1           11/1
Distribution Date.....................       4/15           5/15           8/15          11/15
- ----------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .2068(1)                                              $  4.9617
                                                        --------  $.4134 every month  --------
Quarterly Distribution Plan...........  $   .2068(1)   $   .4161(2)   $  1.2484      $  1.2484    $  4.9937
Semi-Annual Distribution Plan.........  $   .2068(1)   $   .4177(3)                  $  2.5063    $  5.0127
- ----------------------------------------------------------------------------------------------------------------
<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.
(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 $.08 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 $.01378 per unit per day.
Consequently, on the first Record Date (04/01/94), accrued interest will total
$0.8819 per unit for the 64-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 04/01/94 is $.2068, and the
remaining $.6751 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01378              Quarterly - $0.01387
                             Semi-Annual - $0.01392
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.
 
- --------------------------------------------------------------------------------
 
                                                          714
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 27.6 years.
The first bond is scheduled to mature in November, 2013, with the last bond
maturity being November, 2031.
 
- -------------------------------------------------
 
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.
 
- -------------------------------------------------
 
* 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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     COLORADO
     INSURED
     TRUST 52
 
            Estimated Current Return
            First
            Year: 4.69% to 4.83%
            Subsequent
            Years: 4.71% to 4.85%
            as of 01/26/94
 
            Estimated Long Term Return
            4.64% to 4.79%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67097C 858 Monthly Payment Option
                  67097C 866 Quarterly Payment Option
                  67097C 874 Semi-Annual Payment Option
 
                  Registered in Colorado
                    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           Los Angeles
New York, New York 10022      Philadelphia
Telephone: 212.207.2000       Phoenix
                              San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, COLORADO INSURED TRUST 52
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT JANUARY 27, 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>
  --------------------------------------------------------------------------------------------------------------------------
  $  400,000    Colorado Health Facilities Authority, Hospital Revenue Bonds       2003 at 102          AAA           Aaa
                  (North Colorado Medical Center), Series 1993, 5.95% Due
                  5/15/12.
     125,000    Adams County, Colorado, Pollution Control Refunding Revenue        2003 at 101          AAA           Aaa
                  Bonds, 1993 Series A (Public Service Company of Colorado
                  Project), 5.875% Due 4/1/14.
     195,000    St. Vrain Valley School District No. RE-1J, Boulder, Larimer       2002 at 101          AAA           Aaa
                  and Weld Counties, Colorado, General Obligation Refunding
                  Bonds, Series 1992A, 6.00% Due 12/15/10.
     525,000    City of Colorado Springs, Colorado, Utilities System               2004 at 100          AAA           Aaa
                  Improvement and Refunding Revenue Bonds, Series 1994A,
                  5.125% Due 11/15/23. (When issued.)
     525,000    Mesa County, Colorado, Revenue Bonds, Series 1994 (Sisters         2003 at 102          AAA           Aaa
                  of Charity of Leavenworth Health Services Corporation),
                  5.00% Due 12/1/23. (Original issue discount bonds will be
                  delivered on or about February 2, 1994 at a price of
                  94.00% of principal amount.)(When issued.)
     500,000    Metro Wastewater Reclamation District, Colorado, Sewer             2003 at 100          AAA           Aaa
                  Refunding Bonds, Series 1993B, 4.75% Due 4/1/12. (Original
                  issue discount bonds delivered on or about December 29,
                  1993 at a price of 94.39% of principal amount.)
     390,000    Morgan County, Colorado, Pollution Control Refunding Revenue       2003 at 101          AAA           Aaa
                  Bonds, 1993 Series A (Public Service Company of Colorado
                  Project), 5.50% Due 6/1/12.
     210,000    The Poudre Valley Hospital District, Larimer County,               2003 at 101          AAA           Aaa
                  Colorado, Hospital Revenue Refunding Bonds, Series 1993,
                  5.20% Due 12/1/11.
     150,000    City of Thornton, Colorado, General Obligation Water               No Optional          AAA           Aaa
                  Refunding Capital Appreciation Bonds, Series 1991, 0.00%            Call
                  Due 12/1/15. (Original issue discount bonds delivered on
                  or about March 14, 1991 at a price of 18.927% of principal
                  amount.)
     480,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2003 at 101          AAA           Aaa
                  Bonds, Series 1993 (General Obligation Bonds.), 5.25% Due            1/2
                  7/1/18. (Original issue discount bonds delivered on or
                  about July 15, 1993 at a price of 93.414% 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>       <C>      <C>       <C>
50-999                 $5,000-$99,999   4.90 %   $    103.85     (4.69%)  4.71%     (4.72%)  4.74%     (4.74%)  4.76%
1,000-2,499           100,000-249,999   4.50          103.41     (4.71)   4.73      (4.74)   4.76      (4.76)   4.78
2,500-4,999           250,000-499,999   4.25          103.14     (4.72)   4.74      (4.75)   4.77      (4.77)   4.79
5,000-9,999           500,000-999,999   3.50          102.34     (4.76)   4.78      (4.79)   4.81      (4.81)   4.83
10,000 and over    1,000,000 and over   3.00          101.81     (4.78)   4.80      (4.81)   4.84      (4.83)   4.85
</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>
50-999                 $5,000-$99,999   4.90 %   $    103.85          4.64%            4.68%            4.70%
1,000-2,499           100,000-249,999   4.50          103.41          4.66             4.70             4.72
2,500-4,999           250,000-499,999   4.25          103.14          4.67             4.71             4.73
5,000-9,999           500,000-999,999   3.50          102.34          4.71             4.75             4.77
10,000 and over    1,000,000 and over   3.00          101.81          4.73             4.77             4.79
</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
Colorado Insured Trust                                            1994                              per Year +
<S>                                     <C>            <C>            <C>            <C>        <C>
- ------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        4/1            5/1            8/1           11/1
Distribution Date.....................       4/15           5/15           8/15          11/15
- ----------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .2097(1)                                              $  4.8912
                                                        --------  $.4076 every month  --------
Quarterly Distribution Plan...........  $   .2097(1)   $   .4102(2)   $  1.2308      $  1.2308    $  4.9232
Semi-Annual Distribution Plan.........  $   .2097(1)   $   .4118(3)                  $  2.4711    $  4.9422
- ----------------------------------------------------------------------------------------------------------------
<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.
(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 $.08 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 $.01359 per unit per day.
Consequently, on the first Record Date (04/01/94), accrued interest will total
$0.8697 per unit for the 64-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 04/01/94 is $.2097, and the
remaining $.6600 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01359              Quarterly - $0.01368
                             Semi-Annual - $0.01373
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.
 
- --------------------------------------------------------------------------------
 
                                                          714
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 22.7 years.
The first bond is scheduled to mature in December, 2010, with the last bond
maturity being December, 2023.
 
- -------------------------------------------------
 
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.
 
- -------------------------------------------------
 
* 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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     FLORIDA
     INSURED
     TRUST 185
 
            Estimated Current Return
            First
            Year: 4.80% to 4.95%
            Subsequent
            Years: 4.82% to 4.96%
            as of 01/26/94
 
            Estimated Long Term Return
            4.89% to 5.03%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  6706H3 135 Monthly Payment Option
                  6706H3 143 Quarterly Payment Option
                  6706H3 150 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           Los Angeles
New York, New York 10022      Philadelphia
Telephone: 212.207.2000       Phoenix
                              San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, FLORIDA INSURED TRUST 185
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT JANUARY 27, 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>
  --------------------------------------------------------------------------------------------------------------------------
  $  305,000    Florida Municipal Power Agency, All-Requirements Power             2003 at 101          AAA           Aaa
                  Supply Project Revenue Bonds, Series 1993, 5.10% Due
                  10/1/25.
     525,000    The City of Altamonte Springs, Florida, Health Facilities          2003 at 102          AAA           Aaa
                  Authority Hospital Revenue Bonds, Series 1993-B (Adventist
                  Health System/Sunbelt, Inc.), 5.375% Due 11/15/23.
     100,000    Dade County Health Facilities Authority (Florida), Hospital        2003 at 101          AAA           Aaa
                  Revenue Refunding Bonds, Series 1993A (Baptist Hospital of
                  Miami Project), 5.25% Due 5/15/21. (Original issue
                  discount bonds delivered on or about March 17, 1993 at a
                  price of 94.118% of principal amount.)
     525,000    Lee County, Florida, Capital and Transportation Facilities         2003 at 102          AAA           Aaa
                  Refunding Revenue Bonds, Series 1993A, 5.60% Due 10/1/21.
     100,000    Manatee County, Florida, Public Utilities Revenue Refunding        No Optional          AAA           Aaa
                  and Improvement Bonds, Series 1991 C, 0.00% Due 10/1/12.            Call
                  (Original issue discount bonds delivered on or about July
                  2, 1991 at a price of 22.021% of principal amount.)
     500,000    Orlando Utilities Commission (Florida), Water and Electric         2004 at 101          AAA           Aaa
                  Subordinated Revenue Refunding Bonds, Series 1994A, 5.00%
                  Due 10/1/20. (When issued.)
     400,000    City of Palm Bay, Florida, Utility System Refunding Revenue        2003 at 102          AAA           Aaa
                  Bonds, Series 1994 (Palm Bay Utility Corporation Project),
                  5.00% Due 10/1/22. (When issued.)
     525,000    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.)
     520,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2003 at 101          AAA           Aaa
                  Bonds, Series 1993 (General Obligation Bonds.), 5.25% Due            1/2
                  7/1/18. (Original issue discount bonds delivered on or
                  about July 15, 1993 at a price of 93.414% 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>       <C>      <C>       <C>
50-999                 $5,000-$99,999   4.90 %   $    101.75     (4.80%)  4.82%     (4.84%)  4.85%     (4.85%)  4.87%
1,000-2,499           100,000-249,999   4.50          101.32     (4.83)   4.84      (4.86)   4.87      (4.88)   4.89
2,500-4,999           250,000-499,999   4.25          101.06     (4.84)   4.85      (4.87)   4.88      (4.89)   4.90
5,000-9,999           500,000-999,999   3.50          100.27     (4.88)   4.89      (4.91)   4.92      (4.93)   4.94
10,000 and over    1,000,000 and over   3.00           99.75     (4.90)   4.91      (4.93)   4.94      (4.95)   4.96
</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>
50-999                 $5,000-$99,999   4.90 %   $    101.75          4.89%            4.92%            4.94%
1,000-2,499           100,000-249,999   4.50          101.32          4.91             4.94             4.96
2,500-4,999           250,000-499,999   4.25          101.06          4.92             4.95             4.97
5,000-9,999           500,000-999,999   3.50          100.27          4.96             4.99             5.01
10,000 and over    1,000,000 and over   3.00           99.75          4.99             5.02             5.03
</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
Florida Insured Trust                                    1994                          1995             per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>
- ----------------------------------------------------------------------------------------------------  --------------
Record Date*..........................        5/1            8/1           11/1            2/1
Distribution Date.....................       5/15           8/15          11/15           2/15
- --------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .4083(1)                                                  $  4.9000
                                                          --------  $.4083 every month  --------
Quarterly Distribution Plan...........  $   .4083(1)   $  1.2330(2)   $  1.2330      $  1.2330        $  4.9320
Semi-Annual Distribution Plan.........  $   .4083(1)                  $  2.4755(3)                    $  4.9510
- --------------------------------------------------------------------------------------------------------------------
<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.
(2) Regular 3-month distribution.
(3) Regular 6-month distribution.
</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 $.08 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 $.01354 per unit per day.
Consequently, on the first Record Date (05/01/94), accrued interest will total
$1.2729 per unit for the 94-day period. Because a substantial portion of this
interest will not yet be due from the issuers of the bonds in the Fund, the
first payment to all Unitholders of Record on 05/01/94 is $.4083, and the
remaining $.8646 of accrued interest will remain an asset of the Trust and be
distributed in subsequent periods as portfolio bonds mature, or are redeemed, or
sold and the accrued interest on these bonds is collected. After the first
Record Date daily rates of accrual are:
              Monthly - $0.01361              Quarterly - $0.01370
                             Semi-Annual - $0.01375
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.
 
- --------------------------------------------------------------------------------
 
                                                          714
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 27.9 years.
The first bond is scheduled to mature in October, 2012, with the last bond
maturity being October, 2025.
 
- -------------------------------------------------
 
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.
 
- -------------------------------------------------
 
* 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
 
                                 1-800-351-4100
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.


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