<PAGE>
NUVEEN COLORADO NUVEEN
INSURED UNIT TRUST 67 923
- --------------------------------------------------------------------------------
<TABLE>
<S> <C>
RATED: "AAA" NUVEEN TAX-FREE UNIT TRUSTS:
All bonds in this Unit Trust are insured by MBIA For the tax-sensitive, conservative investor.
Insurance Corporation. As a result, the bonds are - Double Tax-Free
rated Aaa by Moody's Investors Service, Inc. and - Dependable Income
both the bonds and the Units are rated AAA by - Diversified Portfolios
Standard & Poor's, the highest rating given by - Top-Rated Municipal Bonds
each agency. DATE OF DEPOSIT: March 6, 1997
ESTIMATED CURRENT RETURN:
4.97 - 5.18%
ESTIMATED LONG-TERM RETURN:
5.02 - 5.31%
</TABLE>
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FDIC OR
ANY OTHER FEDERAL AGENCY AND INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE
LOSS OF PRINCIPAL.
- --------------------------------------------------------------------------------
QUICK FACTS ABOUT THIS UNIT TRUST
<TABLE>
<S> <C>
Tax Status Income is exempt from federal and state income
taxes. Capital gains are taxable.
Total Principal $3,500,000 in 35,000 units
Average Life 23.3 years
Call Protection Earliest ordinary optional call is 2004
Minimum $5,000 or 50 units, whichever is lower
Investment
Offering Price $101.04 to $98.05 depending on the purchase amount
Cusip 6706E9 523 monthly payment plan
Numbers 6706E9 531 quarterly payment plan
6706E9 549 semi-annual payment plan
Insurance Individual bonds (not units) are fully insured by
MBIA Insurance Corporation, which guarantees
timely payment of interest and principal.
Registration Registered in Colorado
</TABLE>
<TABLE>
<S> <C>
Payment Investors may choose to receive monthly, quarterly
Plans or semi-annual interest payments.
Bond Calls Most municipal bonds are subject to optional bond
calls. Bonds are usually called at a premium price
and generally not below par value.
Sales Charge The sales charge is a one-time expense included in
the Public Offering Price.
Letter Investors may use a Letter of Intent to get
of Intent reduced sales charges on purchases made over a
(LOI) 13-month period (and to take advantage of dollar
cost averaging). Minimum LOI investment $50,000.
Redemptions Units can be redeemed on any business day at no
charge. Units are redeemed at their current market
value.
Reinvestment Interest income and returned principal can be
reinvested with no sales charge into Nuveen tax-
free mutual or money market funds. For more
information obtain a prospectus.
</TABLE>
- --------------------------------------------------------------------------------
<TABLE>
<S> <C>
MATURITY DATES (Description of Chart)
2014-16 43.5%
2017-19 14.3%
2020-22 0.0%
2023-25 27.9%
2026+ 14.3%
The earliest ordinary optional call date is 2004
YIELD COMPARISON AS OF 03/05/97*
(Description of Yield Comparison Chart)
Nuveen UIT
Yield 4.97%
Tax Equivalent Yield 8.15%
Treasury Bonds
Yield 6.87%
Tax Equivalent Yield 7.23%
Corporate Bonds
</TABLE>
<PAGE>
<TABLE>
<S> <C>
Yield 7.63%
</TABLE>
*COMPARES TRUST AS OF 03/05/97 WITH 30-YEAR TREASURY BONDS AND LEHMAN BROTHERS
INVESTMENT GRADE LONG CORPORATE BOND INDEX AS OF 03/04/97. ASSUMES 39.0%
FEDERAL AND STATE INCOME TAX RATE AND A 5.0% STATE INCOME TAX RATE. TREASURY
BONDS ARE SUBJECT TO FEDERAL BUT NOT STATE INCOME TAXES; CORPORATE BONDS ARE
GENERALLY SUBJECT TO BOTH. TREASURY BONDS, UNLIKE MUNICIPAL BONDS, ARE
GUARANTEED BY THE U.S. GOVERNMENT.
CALL 1.800.257.8787 FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION
INCLUDING CHARGES AND EXPENSES.
READ THE PROSPECTUS CAREFULLY BEFORE INVESTING.
<PAGE>
- --------------------------------------------------------------------------------
BONDS THIS COLORADO INSURED UNIT TRUST CONTAINS
<TABLE>
<CAPTION>
RATINGS
PRINCIPAL EARLIEST CALL ----------
AMOUNT BOND ISSUE DATE AND PRICE S&P MOODY'S
<C> <S> <C> <C><C>
----------------------------------------------------------------------------------------------------------------
$ 500,000 Colorado Health Facilities Authority, Hospital Revenue Bonds (The 2006 at 101 AAA Aaa
Children's Hospital Association Project), Series 1996, 5.25% Due 10/1/26.
500,000 City of Colorado Springs, Colorado, Airport System Revenue Bonds, Series 2006 at 101 AAA Aaa
1996A, 5.25% Due 1/1/17.
450,000 City of Colorado Springs, Colorado, Utilities System Improvement and 2004 at 100 AAA Aaa
Refunding Revenue Bonds, Series 1994A, 5.125% Due 11/15/23.
525,000 City and County of Denver, Colorado, Airport System Revenue Bonds, Series 2005 at 102 AAA Aaa
1995A, 5.70% Due 11/15/25.
500,000 Douglas County School District, Number Re.1, Douglas and Elbert Counties, 2006 at 101 AAA Aaa
Colorado, General Obligation Refunding Bonds, Series 1996, 5.125% Due
12/15/16.
500,000 Highlands Ranch Metropolitan District No. 2, Douglas County, Colorado, 2006 at 101 AAA Aaa
General Obligation Refunding Bonds, Series 1996, 5.00% Due 6/15/16.
(Original issue discount bonds delivered on or about March 26, 1996 at a
price of 93.357% of principal amount.)
525,000 Platte River Authority (Colorado), Power Revenue Bonds, Series DD, 5.375% 2007 at 102 AAA Aaa
Due 6/1/16. (When issued.)
----------------------------------------------------------------------------------------------------------------
$ 3,500,000 TOTAL 7 BONDS FROM COLORADO.
</TABLE>
- --------------------------------------------------------------------------------
HOW TO DETERMINE YOUR INCOME AND YIELD
HOW TO CALCULATE YOUR RETURN
<TABLE>
<S> <C>
The estimated current return is the net income the sales charge, and returns are as of 03/05/97.
divided by the offering price. Estimated long-term As of this date, Units are offered at the public
return is a measure of the return to the investor offering price plus accrued interest to the
expected to be earned over the estimated life of settlement date of $.07. Returns and prices will
the Unit Trust. The public offering prices, which fluctuate.
include
</TABLE>
<TABLE>
<CAPTION>
Public Estimated Return (CURRENT/Long Term)
Breakpoints Offering Sales -------------------------------------------------
Units / Dollars Price Charge Monthly Plan Quarterly Plan Semi-Annual Plan
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
50 / $5,000 $ 101.04 4.90 % 4.97% 5.02% 5.01% 5.06% 5.02% 5.08 %
500 / $50,000 100.88 4.75 4.98 5.03 5.01 5.07 5.03 5.09
1,000 / $100,000 100.62 4.50 5.00 5.05 5.03 5.09 5.05 5.11
2,500 / $250,000 100.36 4.25 5.01 5.07 5.04 5.11 5.06 5.13
5,000 / $500,000 99.58 3.50 5.05 5.13 5.08 5.17 5.10 5.19
10,000 / $1,000,000 99.06 3.00 5.07 5.17 5.11 5.21 5.13 5.23
25,000 / $2,500,000 98.55 2.50 5.10 5.21 5.13 5.25 5.15 5.27
50,000 / $5,000,000 98.05 2.00 5.13 5.25 5.16 5.29 5.18 5.31
</TABLE>
HOW TO DETERMINE YOUR
TAXABLE EQUIVALENT YIELD
The table shows the approximate yield an investor must get from a taxable
investment to match the estimated current return from this Unit Trust.
<TABLE>
<CAPTION>
Taxable Equivalent Yield (by tax
UNIT TRUST bracket)
RETURN 31.5% 34.5% 39.0% 42.5%
<C> <S> <C> <C> <C> <C>
4.97 % 7.26% 7.59% 8.15% 8.64 %
4.98 7.27 7.60 8.16 8.66
5.00 7.30 7.63 8.20 8.70
5.01 7.31 7.65 8.21 8.71
5.05 7.37 7.71 8.28 8.78
5.07 7.40 7.74 8.31 8.82
5.10 7.45 7.79 8.36 8.87
5.13 7.49 7.83 8.41 8.92
</TABLE>
JOHN NUVEEN & CO. INCORPORATED
333 WEST WACKER DRIVE, CHICAGO, IL 60606
HOW TO CALCULATE YOUR INCOME
The table shows expected interest payments for monthly, quarterly and
semi-annual plans. Payments will remain relatively constant as long as the Unit
Trust's size, composition and expenses remain the same. The first record date is
04/01/97.
<TABLE>
<CAPTION>
Annual
First Payment Payment Income
Payment Plan Date (per unit) (per unit)
<S> <C> <C> <C> <C>
Initial partial
payment (all
plans) 4/15/97 $ .3490
Monthly plan 5/15/97 .4188 $ 5.0261
Quarterly plan 5/15/97 .4215
8/15/97 1.2645 5.0581
Semi-annual plan 5/15/97 .4230
11/15/97 2.5380 5.0771
EXAMPLE OF HOW TO CALCULATE YOUR ESTIMATED INCOME:
$10,000 DIVIDED BY 101.11 = 98.902
investment offering price # of units
(as of and accrued purchased
03/05/97) interest
98.902 X $5.0261 = $497.09
# of units annual income annual income
purchased per unit
(monthly plan)
</TABLE>
<PAGE>
NUVEEN MASSACHUSETTS NUVEEN
INSURED UNIT TRUST 144 923
- --------------------------------------------------------------------------------
<TABLE>
<S> <C>
RATED: "AAA" NUVEEN TAX-FREE UNIT TRUSTS:
All bonds in this Unit Trust are insured by MBIA For the tax-sensitive, conservative investor.
Insurance Corporation. As a result, the bonds are - Double Tax-Free
rated Aaa by Moody's Investors Service, Inc. and - Dependable Income
both the bonds and the Units are rated AAA by - Diversified Portfolios
Standard & Poor's, the highest rating given by - Top-Rated Municipal Bonds
each agency. DATE OF DEPOSIT: March 6, 1997
ESTIMATED CURRENT RETURN:
5.10 - 5.31%
ESTIMATED LONG-TERM RETURN:
5.17 - 5.43%
</TABLE>
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FDIC OR
ANY OTHER FEDERAL AGENCY AND INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE
LOSS OF PRINCIPAL.
- --------------------------------------------------------------------------------
QUICK FACTS ABOUT THIS UNIT TRUST
<TABLE>
<S> <C>
Tax Status Income is exempt from federal and state income
taxes. Capital gains are taxable.
Total Principal $3,500,000 in 35,000 units
Average Life 27.1 years
Call Protection Earliest ordinary optional call is 2004
Minimum $5,000 or 50 units, whichever is lower
Investment
Offering Price $100.39 to $97.42 depending on the purchase amount
Cusip 67065D 136 monthly payment plan
Numbers 67065D 144 quarterly payment plan
67065D 151 semi-annual payment plan
Insurance Individual bonds (not units) are fully insured by
MBIA Insurance Corporation, which guarantees
timely payment of interest and principal.
Registration Registered in Massachusetts
</TABLE>
<TABLE>
<S> <C>
Payment Investors may choose to receive monthly, quarterly
Plans or semi-annual interest payments.
Bond Calls Most municipal bonds are subject to optional bond
calls. Bonds are usually called at a premium price
and generally not below par value.
Sales Charge The sales charge is a one-time expense included in
the Public Offering Price.
Letter Investors may use a Letter of Intent to get
of Intent reduced sales charges on purchases made over a
(LOI) 13-month period (and to take advantage of dollar
cost averaging). Minimum LOI investment $50,000.
Redemptions Units can be redeemed on any business day at no
charge. Units are redeemed at their current market
value.
Reinvestment Interest income and returned principal can be
reinvested with no sales charge into Nuveen tax-
free mutual or money market funds. For more
information obtain a prospectus.
</TABLE>
- --------------------------------------------------------------------------------
<TABLE>
<S> <C>
MATURITY DATES (Description of Chart)
2016-18 22.7%
2019-21 9.6%
2022-24 14.3%
2025-27 39.1%
2028+ 14.3%
The earliest ordinary optional call date is 2004
YIELD COMPARISON AS OF 03/05/97*
(Description of Yield Comparison Chart)
Nuveen UIT
Yield 5.10%
Tax Equivalent Yield 9.03%
Treasury Bonds
Yield 6.87%
Tax Equivalent Yield 7.81%
Corporate Bonds
</TABLE>
<PAGE>
<TABLE>
<S> <C>
Yield 7.63%
</TABLE>
*COMPARES TRUST AS OF 03/05/97 WITH 30-YEAR TREASURY BONDS AND LEHMAN BROTHERS
INVESTMENT GRADE LONG CORPORATE BOND INDEX AS OF 03/04/97. ASSUMES 43.5%
FEDERAL AND STATE INCOME TAX RATE AND A 12.0% STATE INCOME TAX RATE. TREASURY
BONDS ARE SUBJECT TO FEDERAL BUT NOT STATE INCOME TAXES; CORPORATE BONDS ARE
GENERALLY SUBJECT TO BOTH. TREASURY BONDS, UNLIKE MUNICIPAL BONDS, ARE
GUARANTEED BY THE U.S. GOVERNMENT.
CALL 1.800.257.8787 FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION
INCLUDING CHARGES AND EXPENSES.
READ THE PROSPECTUS CAREFULLY BEFORE INVESTING.
<PAGE>
- --------------------------------------------------------------------------------
BONDS THIS MASSACHUSETTS INSURED UNIT TRUST CONTAINS
<TABLE>
<CAPTION>
RATINGS
PRINCIPAL EARLIEST CALL ----------
AMOUNT BOND ISSUE DATE AND PRICE S&P MOODY'S
<C> <S> <C> <C><C>
----------------------------------------------------------------------------------------------------------------
$ 165,000 The Commonwealth of Massachusetts, General Obligation Bonds, Consolidated 2006 at 101 AAA Aaa
Loan of 1996, Series D, 5.00% Due 11/1/16. (Original issue discount bonds
delivered on or about November 21, 1996 at a price of 93.412% of principal
amount.)
500,000 Massachusetts Bay Transportation Authority, General Transportation System 2006 at 101 AAA Aaa
Bonds, 1996 Series A, 5.625% Due 3/1/26. (Original issue discount bonds
delivered on or about March 21, 1996 at a price of 94.15% of principal
amount.)(General Obligation Bonds.)
500,000 Massachusetts Health and Educational Facilities Authority, Revenue Bonds, 2005 at 101 AAA Aaa
Mary Hitchcock Memorial Hospital Obligated Group (Cooley Dickinson Hospital
Issue), Series B, 5.50% Due 11/15/25.
500,000 Massachusetts Health and Educational Facilities Authority, Revenue Bonds, 2005 at 102 AAA Aaa
Harvard University Issue, Series P, 5.375% Due 11/1/32. (Original issue
discount bonds delivered on or about June 13, 1995 at a price of 94.007% of
principal amount.)
335,000 Massachusetts Industrial Finance Agency, Revenue Bonds (College of the Holy 2006 at 102 AAA Aaa
Cross-1996 Issue), 5.50% Due 3/1/20.
500,000 Massachusetts Municipal Wholesale Electric Company, Power Supply System 2004 at 102 AAA Aaa
Revenue Bonds, 1994 Series B, 5.00% Due 7/1/17.
130,000 Massachusetts Water Resources Authority, General Revenue Bonds, 1995 Series 2005 at 102 AAA Aaa
B, 5.00% Due 12/1/16.
370,000 Massachusetts Water Resources Authority, General Revenue Bonds, 1996 Series 2006 at 101 AAA Aaa
A, 5.60% Due 11/1/26.
500,000 South Essex Sewerage District, Massachusetts, General Obligation Sewer 2006 at 102 AAA Aaa
Bonds, 1996 Series A, 5.25% Due 6/15/24.
----------------------------------------------------------------------------------------------------------------
$ 3,500,000 TOTAL 9 BONDS FROM MASSACHUSETTS.
</TABLE>
- --------------------------------------------------------------------------------
HOW TO DETERMINE YOUR INCOME AND YIELD
HOW TO CALCULATE YOUR RETURN
<TABLE>
<S> <C>
The estimated current return is the net income the sales charge, and returns are as of 03/05/97.
divided by the offering price. Estimated long-term As of this date, Units are offered at the public
return is a measure of the return to the investor offering price plus accrued interest to the
expected to be earned over the estimated life of settlement date of $.07. Returns and prices will
the Unit Trust. The public offering prices, which fluctuate.
include
</TABLE>
<TABLE>
<CAPTION>
Public Estimated Return (CURRENT/Long Term)
Breakpoints Offering Sales -------------------------------------------------
Units / Dollars Price Charge Monthly Plan Quarterly Plan Semi-Annual Plan
<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
50 / $5,000 $ 100.39 4.90 % 5.10% 5.17% 5.13% 5.20% 5.15% 5.22 %
500 / $50,000 100.23 4.75 5.11 5.17 5.14 5.20 5.16 5.22
1,000 / $100,000 99.97 4.50 5.12 5.19 5.15 5.22 5.17 5.24
2,500 / $250,000 99.71 4.25 5.13 5.21 5.17 5.24 5.18 5.26
5,000 / $500,000 98.93 3.50 5.17 5.27 5.21 5.30 5.23 5.32
10,000 / $1,000,000 98.42 3.00 5.20 5.30 5.23 5.33 5.25 5.36
25,000 / $2,500,000 97.92 2.50 5.23 5.34 5.26 5.37 5.28 5.39
50,000 / $5,000,000 97.42 2.00 5.25 5.38 5.29 5.41 5.31 5.43
</TABLE>
HOW TO DETERMINE YOUR
TAXABLE EQUIVALENT YIELD
The table shows the approximate yield an investor must get from a taxable
investment to match the estimated current return from this Unit Trust.
<TABLE>
<CAPTION>
Taxable Equivalent Yield (by tax
UNIT TRUST bracket)
RETURN 36.5% 39.5% 43.5% 47.0%
<C> <S> <C> <C> <C> <C>
5.10 % 8.03% 8.43% 9.03% 9.62 %
5.11 8.05 8.45 9.04 9.64
5.12 8.06 8.46 9.06 9.66
5.13 8.08 8.48 9.08 9.68
5.17 8.14 8.55 9.15 9.75
5.20 8.19 8.60 9.20 9.81
5.23 8.24 8.64 9.26 9.87
5.25 8.27 8.68 9.29 9.91
</TABLE>
JOHN NUVEEN & CO. INCORPORATED
333 WEST WACKER DRIVE, CHICAGO, IL 60606
HOW TO CALCULATE YOUR INCOME
The table shows expected interest payments for monthly, quarterly and
semi-annual plans. Payments will remain relatively constant as long as the Unit
Trust's size, composition and expenses remain the same. The first record date is
04/01/97.
<TABLE>
<CAPTION>
Annual
First Payment Payment Income
Payment Plan Date (per unit) (per unit)
<S> <C> <C> <C> <C>
Initial partial
payment (all
plans) 4/15/97 $ .3552
Monthly plan 5/15/97 .4263 $ 5.1189
Quarterly plan 5/15/97 .4290
8/15/97 1.2870 5.1509
Semi-annual plan 5/15/97 .4308
11/15/97 2.5848 5.1699
EXAMPLE OF HOW TO CALCULATE YOUR ESTIMATED INCOME:
$10,000 DIVIDED BY 100.46 = 99.542
investment offering price # of units
(as of and accrued purchased
03/05/97) interest
99.542 X $5.1189 = $509.55
# of units annual income annual income
purchased per unit
(monthly plan)
</TABLE>
