<PAGE>
NUVEEN NATIONAL NUVEEN
INSURED UNIT TRUST 344 939
- --------------------------------------------------------------------------------
<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 - Tax-Free
rated Aaa by Moody's Investors Service, Inc. - Dependable Income
and/or AAA by Standard & Poor's, the highest - Diversified Portfolios
rating given by each agency. - Top-Rated Municipal Bonds
ESTIMATED CURRENT RETURN: DATE OF DEPOSIT: May 9, 1997
5.25 - 5.46%
ESTIMATED LONG-TERM RETURN:
5.31 - 5.58%
</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 income tax but may
be subject to state and local tax. Capital gains
are taxable.
Total Principal $10,000,000 in 100,000 units
Average Life 25.1 years
Call Protection Earliest ordinary optional call is 2005
Minimum $5,000 or 50 units, whichever is lower
Investment
Offering Price $100.67 to $97.69 depending on the purchase amount
Cusip 6710A5 733 monthly payment plan
Numbers 6710A5 741 quarterly payment plan
6710A5 758 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 all states
</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>
- --------------------------------------------------------------------------------
PORTFOLIO INCOME DIVERSIFICATION
<TABLE>
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Alabama 10.4 % California 9.7 % Illinois 21.1 %
Indiana 4.6 Texas 16.1 Utah 16.9
Virginia 10.7 Wisconsin 10.5
</TABLE>
<TABLE>
<S> <C>
MATURITY DATES (Description of Chart)
2016-17 5.1%
2018-19 13.3%
2020-21 37.4%
2022-23 14.2%
</TABLE>
<PAGE>
<TABLE>
<S> <C>
2024+ 30.0%
The earliest ordinary optional call date is 2005
YIELD COMPARISON AS OF 05/08/97*
(Description of Yield Comparison Chart)
Nuveen UIT
Yield 5.25%
Tax Equivalent Yield 8.20%
Treasury Bonds
Yield 6.96%
Tax Equivalent Yield 7.33%
Corporate Bonds
Yield 7.79%
</TABLE>
*COMPARES TRUST AS OF 05/08/97 WITH 30-YEAR TREASURY BONDS AND LEHMAN BROTHERS
INVESTMENT GRADE LONG CORPORATE BOND INDEX AS OF 05/07/97. ASSUMES 36.0%
FEDERAL AND 5.0% STATE INCOME TAX RATES. 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 NATIONAL 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>
----------------------------------------------------------------------------------------------------------------
$ 1,000,000 Jefferson County, Alabama, Sewer Revenue Warrants, Series 1997-D, 5.75% Due AAA Aaa
2/1/27. 2007 at 101
510,000 City of Oakland (California), General Obligation Bonds (Series 1997C, AAA Aaa
Measure K), 5.80% Due 12/15/16. 2006 at 102
415,000 Y/S School Facilities Financing Authority (California), 1997 Sweetwater AAA Aaa
Special Tax Revenue Bonds, Series A (Rancho Del Rey Middle School), 5.75%
Due 9/1/22. 2005 at 102
1,000,000 Illinois Health Facilities Authority Revenue Bonds, Series 1997A (Highland AAA Aaa
Park Hospital Project), 5.75% Due 10/1/26. (When issued.) 2007 at 102
1,000,000 The County of Cook, Illinois, General Obligation Capital Improvement Bonds, AAA Aaa
Series 1996, 5.875% Due 11/15/22. 2006 at 101
500,000 The Board of Trustees for the Vincennes University (Indiana), Vincennes AAA Aaa
University Housing and Dining System Revenue Bonds, Series 1996, 5.125% Due
10/1/21. (Original issue discount bonds delivered on or about February 21,
1996 at a price of 93.831% of principal amount.) 2006 at 102
1,500,000 Harris County Health Facilities Development Corporation, Special Facilities AAA Aaa
Revenue Bonds (Texas Medical Center Project), Series 1996, 5.90% Due
5/15/20. 2006 at 102
1,000,000 Intermountain Power Agency (Utah), Power Supply Revenue Refunding Bonds, AAA Aaa
1997 Series B, 5.75% Due 7/1/19. 2007 at 102
750,000 Murray City, Utah, Hospital Revenue Bonds, Series 1996 (IHC Health AAA Aaa
Services, Inc.), 4.75% Due 5/15/20. (Original issue discount bonds
delivered on or about March 12, 1996 at a price of 91.527% of principal
amount.) 2006 at 100
1,000,000 City of Norfolk, Virginia, Water Revenue Bonds, Series 1995, 5.875% Due AAA Aaa
11/1/20. 2005 at 102
325,000 Public Utility District No. 1 of Chelan County, Washington, Columbia AAA Aaa
River-Rock Island Hydro-Electric System Revenue Refunding Bonds, Series
1997A, 0.00% Due 6/1/18. (Original issue discount bonds delivered on or
about March 17, 1997 at a price of 28.842% of principal amount.) No Optional
Call
1,000,000 Southeast Wisconsin Professional Baseball Park District, Sales Tax Revenue AAA Aaa
Bonds, Series 1996, 5.80% Due 12/15/26. 2007 at 101
----------------------------------------------------------------------------------------------------------------
$10,000,000 TOTAL 12 BONDS FROM 9 STATES.
</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 05/08/97.
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 $ 100.67 4.90 % 5.25% 5.31% 5.28% 5.34% 5.30% 5.36 %
500 / $50,000 100.51 4.75 5.26 5.32 5.29 5.35 5.31 5.37
1,000 / $100,000 100.25 4.50 5.27 5.34 5.30 5.37 5.32 5.39
2,500 / $250,000 99.99 4.25 5.28 5.36 5.32 5.39 5.34 5.41
5,000 / $500,000 99.21 3.50 5.33 5.42 5.36 5.45 5.38 5.47
10,000 / $1,000,000 98.70 3.00 5.35 5.46 5.39 5.49 5.40 5.51
25,000 / $2,500,000 98.19 2.50 5.38 5.50 5.41 5.53 5.43 5.55
50,000 / $5,000,000 97.69 2.00 5.41 5.53 5.44 5.56 5.46 5.58
</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
UNIT TRUST tax bracket)
RETURN 28.0% 31.0% 36.0% 39.6%
<C> <S> <C> <C> <C> <C>
5.25 % 7.29% 7.61% 8.20% 8.69%
5.26 7.31 7.62 8.22 8.71
5.27 7.32 7.64 8.23 8.73
5.28 7.33 7.65 8.25 8.74
5.33 7.40 7.72 8.33 8.82
5.35 7.43 7.75 8.36 8.86
5.38 7.47 7.80 8.41 8.91
5.41 7.51 7.84 8.45 8.96
</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
06/01/97.
<TABLE>
<CAPTION>
Annual
First Payment Payment Income
Payment Plan Date (per unit) (per unit)
<S> <C> <C> <C> <C>
Initial partial
payment (all
plans) 6/15/97 $ .3227
Monthly plan 7/15/97 .4401 $ 5.2837
Quarterly plan 8/15/97 .8856
11/15/97 1.3284 5.3157
Semi-annual plan 11/15/97 2.2215
5/15/98 2.6658 5.3347
EXAMPLE OF HOW TO CALCULATE YOUR ESTIMATED INCOME:
$10,000 DIVIDED BY 100.74 = 99.265
investment offering price # of units
(as of and accrued purchased
05/08/97) interest
99.265 X $5.2837 = $524.49
# of units annual income annual income
purchased per unit
(monthly plan)
</TABLE>
