MUNICIPAL INVESTMENT TR FD INVES GRDE PORT 11 BBB QUAL OR BE
487, 1999-04-23
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<PAGE>
   
     As filed with the Securities and Exchange Commission on April 23, 1999

                                                      Registration No. 333-70583
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

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

                                Amendment No. 1
                                       to
                                    Form S-6

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

                   FOR REGISTRATION UNDER THE SECURITIES ACT
                    OF 1933 OF SECURITIES OF UNIT INVESTMENT
                        TRUSTS REGISTERED ON FORM N-8B-2

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

A. Exact name of trust:
                        MUNICIPAL INVESTMENT TRUST FUND
                         INVESTMENT GRADE PORTFOLIO--11
                            (BBB QUALITY OR BETTER)
                         LONG-INTERMEDIATE TERM SERIES
                              DEFINED ASSET FUNDS

B. Name of depositor:

                   MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
                           SALOMON SMITH BARNEY INC.
                            PAINEWEBBER INCORPORATED
                           DEAN WITTER REYNOLDS INC.

C. Complete addresses of depositors' principal executive offices:


 MERRILL LYNCH, PIERCE,
        FENNER &
   SMITH INCORPORATED
  Unit Investment Trust
        Division
      P.O. Box 9051
Princeton, NJ 08543-9051                          PAINEWEBBER INCORPORATED
                                                     1285 Avenue of the
                                                          Americas
                                                     New York, NY 10019

SALOMON SMITH BARNEY INC.
      388 Greenwich
   Street--23rd Floor
   New York, NY 10013
                                                  DEAN WITTER REYNOLDS INC.
                                                       Two World Trade
                                                     Center--59th Floor
                                                     New York, NY 10048


D. Names and complete addresses of agents for service:


  TERESA KONCICK, ESQ.
      P.O. Box 9051
Princeton, NJ 08543-9051                              ROBERT E. HOLLEY
                                                      1200 Harbor Blvd.
                                                     Weehawken, NJ 07087

                                Copies to:           DOUGLAS LOWE, ESQ.
                          PIERRE DE SAINT PHALLE, Dean Witter Reynolds Inc.
    MICHAEL KOCHMANN               ESQ.                Two World Trade
  388 Greenwich Street     450 Lexington Avenue      Center--59th Floor
   New York, NY 10013       New York, NY 10017       New York, NY 10048


E. Title of Securities Being Registered:

  An indefinite number of Units of Beneficial Interest pursuant to Rule 24f-2
       promulgated under the Investment Company Act of 1940, as amended.

F. Approximate date of proposed sale to public:

 As soon as practicable after the effective date of the Registration Statement.

/ x / Check box if it is proposed that this registration statement will become
      effective upon filing on April 23, 1999, pursuant to Rule 487.
    

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<PAGE>
   
                                     Defined Asset FundsSM
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------


                              Municipal Investment Trust Fund
                              Investment Grade Portfolio--11
                              (BBB Quality or Better)
                              Long-Intermediate Term Series
                              (A Unit Investment Trust)
                              o   Portfolio of Long-Intermediate Term Municipal
                                  Bonds
                              o   Designed for Income Free from Regular Federal
                                  Income Tax
                              o   Income Distributions Twice A Year
                              o   AMT Bonds
    



Sponsors:                      -------------------------------------------------
Merrill Lynch,                 The Securities and Exchange Commission has not
Pierce, Fenner & Smith         approved or disapproved these Securities or
Incorporated                   passed upon the adequacy of this prospectus. Any
Salomon Smith Barney Inc.      representation to the contrary is a criminal
PaineWebber Incorporated       offense.
Dean Witter Reynolds Inc.      Prospectus dated April 23, 1999.


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

Defined Asset FundsSM
Defined Asset FundsSM is America's oldest and largest family of unit investment
trusts, with over $160 billion sponsored over the last 28 years. Defined Asset
Funds has been a leader in unit investment trust research and product
innovation. Our family of Funds helps investors work toward their financial
goals with a full range of quality investments, including municipal, corporate
and government bond portfolios, as well as domestic and international equity
portfolios.

Defined Asset Funds offer a number of advantages:
o Fixed portfolio: Defined Funds follow a buy and hold investment strategy;
  funds are not managed and portfolio changes are limited.
o Preselected Portfolios: We choose the stocks and bonds in advance, so you know
  what you're investing in.
o Professional research: Our dedicated research team seeks out stocks or bonds
  appropriate for a particular fund's objectives.
o Ongoing supervision: We monitor each portfolio on an ongoing basis.
No matter what your investment goals, tolerance for risk or time horizon,
there's probably a Defined Asset Fund that suits your investment style. Your
financial professional can help you select a Defined Asset Fund that works best
for your investment portfolio.


   
Contents
                                                                Page
                                                          -----------
Risk/Return Summary and Portfolio.......................           3
What You Can Expect From Your Investment................           8
   Income Twice A Year..................................           8
   Return Figures.......................................           8
   Records and Reports..................................           8
The Risks You Face......................................           9
   Ratings Risk.........................................           9
   Interest Rate Risk...................................           9
   Call Risk............................................           9
   Reduced Diversification Risk.........................          10
   Liquidity Risk.......................................          10
   Bond Quality Risk....................................          10
   Insurance Related Risk...............................          10
   Concentration Risk...................................          10
   Litigation and Legislation Risks.....................          10
Selling or Exchanging Units.............................          11
   Sponsors' Secondary Market...........................          11
   Selling Units to the Trustee.........................          11
   Exchange Option......................................          12
How The Fund Works......................................          13
   Pricing..............................................          13
   Evaluations..........................................          13
   Income...............................................          13
   Expenses.............................................          13
   Portfolio Changes....................................          14
   Fund Termination.....................................          14
   Certificates.........................................          15
   Trust Indenture......................................          15
   Legal Opinion........................................          16
   Auditors.............................................          16
   Sponsors.............................................          16
   Trustee..............................................          16
   The Credit Consultant................................          17
   Underwriters' and Sponsors' Profits..................          17
   Public Distribution..................................          17
   Code of Ethics.......................................          17
   Year 2000 Issues.....................................          18
Taxes...................................................          18
Supplemental Information................................          19
Financial Statements....................................          20
   Report of Independent Accountants....................          20
   Statement of Condition...............................          20
    


                                       2
<PAGE>
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Risk/Return Summary


   
       1.  What is the Fund's Objective?
           The Fund seeks interest income that is exempt from regular
           federal income taxes by investing in a fixed portfolio
           consisting primarily of 9 to 16 year municipal revenue
           bonds with an estimated average life of 14 years.
       2.  What are Municipal Revenue Bonds?
           Municipal revenue bonds are bonds issued by states,
           municipalities and public authorities to finance the cost
           of buying, building or improving various projects intended
           to generate revenue, such as airports, health care
           facilities, housing and municipal electric, water and sewer
           utilities. Generally, payments on these bonds depend solely
           on the revenues generated by the projects, excise taxes or
           state appropriations, and are not backed by the
           government's taxing power.
       3.  What is the Fund's Investment Strategy?
        o  The Fund plans to hold to maturity    long-intermediate
           term tax-exempt municipal bonds with a current aggregate
           face amount of $10,325,000.
        o  The Fund is a unit investment trust which means that,
           unlike a mutual fund, the Fund's portfolio is not managed.
        o  The bonds in the Fund were selected by the agent for the
           Sponsors with the help of Fitch IBCA, Inc., the Credit
           Consultant, which reviewed the bonds proposed by the agent
           for the Sponsors. When initially deposited in the Fund,
           each bond was considered to be investment grade quality by
           Fitch or have, in the opinion of Agent for the Sponsors,
           comparable credit characteristics of bonds rated 'A' or
           better. In some cases, Standard & Poor's and/or Moody's
           rated the bonds as investment grade.
        o  Fitch's opinions regarding investment grade characteristics
           are based exclusively on publicly available information
           provided to it by the Agent for the Sponsors and other
           information already in Fitch's possession. Fitch will use
           its professional expertise to evaluate the information and
           prepare its opinions. The opinion of the Agent for the
           Sponsors is based both on publicly available information
           provided to it by the bond's issuer, underwriter and/or
           placement agent and other information already in its
           possession as well as information gathered during on-site
           visits and through private meetings with the issuer and
           others.
        o  Fitch as Credit Consultant has an ongoing responsibility to
           monitor the bonds and to inform the Agent for the Sponsors
           if in Fitch's opinion any bond no longer has investment
           grade characteristics. If the Credit Consultant does not
           believe it has enough information to continue to monitor a
           bond, it may withdraw its opinion as to the investment
           grade quality of the bond unless the agent for the Sponsors
           provides adequate information about the bond.
        o  Many of the bonds can be called at a premium declining over
           time to par value. Some bonds may be called earlier at par
           for extraordinary reasons.
        o  35% of the bonds are backed by bank letters of credit.
        o  11% of the bonds are insured by insurance companies.
           Letters of credit and insurance guarantees timely payments
           of principal and interest on the bonds (but not Fund uits
           or the market value of the bonds before they mature).
           The Portfolio consists of municipal bonds of the following
           types:



                                                 Approximate
                                                  Portfolio
                                                  Percentage



        o  Financial Institutions                      35%
        o  General Obligation                          10%
        o  Hospitals/Health Care                       18%
        o  Housing                                      6%
        o  Lease Rental                                 6%
        o  Municipal Electric Utility                   1%
        o  Natural Resources                           10%
        o  Special Tax                                 10%
        o  University/College                           4%
    


                                       3
<PAGE>
   
- --------------------------------------------------------------------------------
                               Defined Portfolio
- --------------------------------------------------------------------------------
Investment Grade Portfolio--11 (BBB Quality or Better) Long-Intermediate Term
Series

<TABLE>
<CAPTION>

                                                                      Fitch      Standard
                                                                     Credit      & Poor's    Moody's            Cost
Portfolio Title                         Coupon      Maturity (1)   Quality (2)  Rating (3)  Rating (4)      To Fund (5)
- ----------------------------------------------------------------------------------------------------------------------------


Financial Institutions (35%):


<S>                                   <C>          <C>              <C>          <C>        <C>          <C>
 1. $390,000 The Industrial Dev. Bd.  5.10-5.35%    3/1/10-14       ++           AA-+        Aa2+        $         394,101.05
   of the City of Montgomery, AL,
   Indl. Dev. Rev. Bonds (Tom
   Chapman Proj.), Ser. 1999
   (Regions Bank, Montgomery,
   AL--Letter of Credit)(7)
2. $590,000 Development Auth. of     5.15-5.25     4/1/08-09       ++           A++         NR                    593,392.40
   Johnson Cnty., GA, Rev. Bonds
   (Bellcrest Homes, Inc. Proj.)
   (First Commercial Bank,
   Birmingham, AL--Letter of
   Credit)(7)
3. $1,060,000 Crisp Cnty.--Cordele   5.15-5.25     4/1/08-09       ++           A++         NR                  1,066,094.70
   Indl. Dev. Auth., GA, Rev. Bonds
   (Cavalier Industries, Inc.
   Proj.) (First Commercial Bank,
   Birmingham, AL--Letter of
   Credit)(7)
4. $15,000 Baltimore Cnty., MD,      5.50          3/1/00          ++           A+          A1+                    15,000.00
   Econ. Dev. Rev. Bonds (E. John
   Schmitz & Sons, Inc.), Ser. 1988
   (First National Bank of
   Maryland-- Letter of
   Credit)(6)(7)
5. $265,000 Industrial Dev. Bd. of   5.60          3/1/13          ++           A+          Aa3+                  273,376.65
   Crenshaw Cnty., AL, Indl. Rev.
   Bonds (Sister Schubert's
   Homemade Rolls, Inc. Proj.),
   Ser. 1998 (AmSouth Bank--Letter
   of Credit)(7)
6. City of David City, NE, Indl.
   Dev. Rev. Bonds (Henningsen
   Foods, Inc. Proj.), Ser. 1998
   (The Bank of Tokyo-Mitsubishi,
   Ltd., Chicago Branch--Letter of
   Credit)(7)
$30,000(6)                           3.80          9/15/99         ++           NR          A1+                    30,015.90
$1,275,000                           5.40          9/15/10         ++           NR          A1+                 1,298,434.50


General Obligation Bonds (10%):


7. $1,000,000 Central Platte Valley  5.15          12/1/13         A            A           NR                  1,004,280.00
   Metro. Dist., (Denver Cnty.,
   CO), G.O. Bonds, Ser. 1999 (ACA
   Ins.)
8. $100,000 City School Dist.,       4.125         6/15/01         AAA          NR          Aaa                   101,278.00
   Oneida, NY, Sch. Dist. Bonds,
   Ser. 1998 (FSA Ins.)(6)

</TABLE>

- ------------------------------------
(1)  Some bonds may be subject to call provisions under extraordinary
circumstances.
(2)  These ratings are ratings of the issues themselves by Fitch IBCA, Inc.
Where an 'O' appears, Fitch has not rated the issue, but has delivered an
opinion that the issue has investment grade credit characteristics. Where '++'
appears, Fitch has not rated the issue, but in the opinion of the Agent for the
Sponsors, the issue has credit characteristics comparable to investment grade
bonds.
(3)  These ratings are ratings of the bonds themselves by Standard & Poor's; '+'
indicates that this is a rating of the letter of credit securing the bond. The
symbol 'NR' indicates that Standard & Poor's did not rate the issue.
(4)  These ratings are ratings of the issues themselves by Moody's; '+'
indicates that this is a rating of the letter of credit securing the bond.
Moody's ratings have been furnished by the Evaluator but not confirmed with
Moody's. The symbol 'NR' indicates that Moody's did not rate the issue.
          ------------------------------------------------------------

 Please note that if this prospectus is used as a preliminary prospectus for a
                          future fund in this Series,
     the Portfolio will contain different bonds from those described above.
    

<PAGE>
- --------------------------------------------------------------------------------
                               Defined Portfolio
- --------------------------------------------------------------------------------
Investment Grade Portfolio--11 (BBB Quality or Better) Long-Intermediate Term
Series

<TABLE>
<CAPTION>

                                                                               Standard
                                                                     Fitch     & Poor's    Moody's
                                                                    Credit      Rating     Rating           Cost
Portfolio Title                        Coupon      Maturity (1)   Quality (2)     (3)        (4)         To Fund (5)
- ------------------------------------------------------------------------------------------------------------------------


   
Hospitals/Health Care (18%):


<S>                                   <C>          <C>              <C>          <C>        <C>          <C>
9. $1,000,000 The Oklahoma Dev.      5.75         8/15/14         O            BBB+       Baa2              1,026,560.00
   Fin. Auth., Hillcrest Healthcare
   Sys., Rev. and Rfdg. Bonds, Ser.
   1999A
10. $1,000,000 Wisconsin Hlth. and   5.375        2/15/15         A-           A-         NR                1,000,000.00
    Educl. Facs. Auth., Rev. Bonds
     (Aurora Hlth. Care, Inc.) Ser
     1999A


Housing (6%):


11. $595,000 City of Beech Grove,    5.20%        6/1/13          O            NR         Aa2        $        599,962.30
    IN, Econ. Dev. Multifamily
    Hsg., Mtge. Rev. Rfdg. Bonds
     (FHA Ins. Mtge. Loan--McGregor
     Woods Apts. Proj.), Ser.
     1998A(7)


Lease Rental (6%):


12. $665,000 Shawnee Cnty, KS,       4.90-5.00    7/1/10-13       ++           NR         NR                  658,596.25
    Certs. of Part. (Shawnee Cmnty.
    Mental Hlth. Ctr., Inc. Proj.),
    Ser. 1999A


Municipal Electric Utility (1%):


13. $25,000 City of Alexandria, LA,  4.20         5/1/00          AAA          AAA        Aaa                  25,224.50
    Util. Rev. Rfdg. Bonds, Ser.
    1993 (Financial Guaranty
    Ins.)(6)


Natural Resources (10%):


14. $1,035,000 City of Nekoosa, WI,  5.35         7/1/15          O            NR         Baa2              1,040,485.50
    Poll. Ctl. Funding Rev. Bonds
     (Nekoosa Papers, Inc. Proj.),
     Ser. 1999A


Special Tax (10%):


15. $1,000,000 Village of Broadview  5.375        7/1/15          BBB          NR         NR                  997,230.00
    (Cook Cnty., IL), Tax Increment
    Rev. Bonds, Ser. 1999


University/College (4%):


16. $450,000 Illinois Dev. Fin.      5.35         12/1/14         ++           NR         NR                  455,422.50
    Auth., Rev. Bonds (Illinois
    Association of Sch. Bus.
    Officials Proj.), Ser. 1998
                                                                                                     -------------------
                                                                                                     $     10,579,454.25
                                                                                                     -------------------
                                                                                                     -------------------

</TABLE>

- ------------------------------------
(5)  Approximately 74% of the bonds were deposited at a premium, 10% at par and
     16% at a discount from par. Sponsors' profit on deposit was $101,248.10.
(6)  The interest and principal on these bonds will be used to pay the deferred
     sales charge obligations of the investors, and these amounts are not
     included in the calculation of Estimated Current and Long Term Returns.
(7)  These bonds are subject to Alternative Minimum Tax.
          ------------------------------------------------------------

 Please note that if this prospectus is used as a preliminary prospectus for a
                          future fund in this Series,
     the Portfolio will contain different bonds from those described above.
    

<PAGE>


   
       4.  What are the Significant Risks?
           You can lose money by investing in the Fund. This can
           happen for various reasons, including:
        o  The Portfolio contains bonds rated in the BBB category by
           Fitch, which is the lowest 'investment grade' rating
           assigned by the rating agency and may contain bonds which
           are not rated. These bonds may have speculative
           characteristics and changes in economic conditions or other
           circumstances are more likely to lead to a weakened
           capacity to make principal and interest payment on these
           bonds than is the case with higher rated securities.
o          The opinions provided to the Agent for the Sponsors by the
           Credit Consultant on unrated bonds will not be traditional
           ratings because:
           -- they will generally not be based on the level of
              information or access to officials generally utilized in
              connection with a traditional credit rating;
           -- they are likely to be given on an expedited basis; and
           -- the opinion will generally not be based on formal
              procedures normally associated with traditional credit
              ratings, such as the use of a rating committee.
           Therefore, the Credit Consultant's opinions on credit
           quality are likely to have less certainty than traditional
           credit ratings.
        o  The Credit Consultant will render an opinion only when in
           the judgement of its analysts it has sufficient information
           to determine whether a bond has investment grade credit
           characteristics.
        o  Rising interest rates, an issuer's worsening financial
           condition or a drop in bond ratings can reduce the price of
           your units.
        o  Because the Fund is concentrated in financial institution
           bonds, adverse developments in this sector may affect the
           value of your Units.
        o  Assuming no changes in interest rates, when you sell your
           units, they will generally be worth less than your cost
           because your cost included a sales fee.
        o  The Fund will receive early returns of principal if bonds
           are called or sold before they mature. If this happens your
           income will decline and you may not be able to reinvest the
           money you receive at as high a yield or as long a maturity.
       5.  Is this Fund Appropriate for You?
           Yes, if you want regular income free from regular federal
           income tax. You will benefit from a professionally selected
           and supervised portfolio whose risk is reduced by investing
           in bonds of several different issuers.
           The Fund is not appropriate for you if you want a
           speculative investment that changes to take advantage of
           market movements, if you do not want a tax-advantaged
           investment, if you are subject to AMT or if you cannot
           tolerate any risk.



           Defining Your Income
           and Estimating Your Return



           What You May Expect
           First payment per 1,000 units (11/25/99)          $   28.34
           Regular Semi-Annual Income per 1,000 units
           (each May and November beginning 5/25/00):        $   25.90
           Annual Income per 1,000 units:                    $   51.80
           Record Day: 10th day of each May and November
           These figures are estimates on the business day before the
           initial date of deposit; actual payments may vary.



           Estimated Current Return                                  5.00%
           Estimated Long Term Return                                4.88%
           These returns will vary (see page 7)



       6.  What are the Fund's Fees and Expenses?
           This table shows the costs and expenses you may pay,
           directly or indirectly, when you invest in the Fund.
           Investor Fees
           Maximum Sales Fee (Load) on new
           purchases (as a percentage of $1,000 invested) 2.75%
           You will pay an up-front sales fee of 1.00%, as well as a
           total deferred sales fee of $17.50 per 1,000 units over a
           two-year period ($2.19 per 1,000 units quarterly in the
           first six quarters and $2.18 per 1,000 units quarterly in
           the next two quarters). Employees of some of the Sponsors
           and their affiliates may be charged a reduced sales fee of
           no less than $5.00 per 1,000 Units.
    


                                       4
<PAGE>
           The maximum sales fee is reduced if you invest at least
           $100,000, as follows:


                                                 Your maximum
                                                    sales fee
                     If you invest:                  will be:
           -----------------------------------  -----------------
           Less than $100,000                            2.75%
           $100,000 to $249,999                          2.50%
           $250,000 to $499,999                          2.25%
           $500,000 to $999,999                          2.00%
           $1,000,000 and over                           1.75%
           Maximum Exchange Fee                          1.75%


           Estimated Annual Fund Operating Expenses


                                           As a % of       Amount
                                              $1,000    Per 1,000
                                            Invested        Units
                                           ----------  -----------
                                                .062%   $    0.63
           Trustee's Fee
                                                .050%   $    0.50
           Portfolio Supervision,
           Bookkeeping,
           Administrative
           (including updating
           expenses) and Credit
           Consultant's Fees
                                                .012%   $    0.13
           Evaluator's Fee
                                                .020%   $    0.20
           Other Operating Expenses
                                           ----------  -----------
                                                .144%   $    1.46
           Total



                                                          Amount
                                                       Per 1,000
                                                           Units
                                                 ---------------------
                                                       $    2.00
           Organizational Costs (deducted from
           Fund assets at the close of the
           initial offering period)



           The Sponsor historically paid organization costs and
           updating expenses.
           Example
           This example may help you compare the cost of investing in
           the Fund to the cost of investing in other funds.
           The example assumes that you invest $10,000 in the Fund for
           the periods indicated and sell all your units at the end of
           those periods. The example also assumes a 5% return on your
           investment each year and that the Fund's operating expenses
           stay the same. Although your actual costs may be higher or
           lower, based on these assumptions your costs would be:



            1 Year     3 Years    5 Years   10 Years
             $309       $341       $375       $476



           You will pay the following expenses if you do not sell
           your units:



            1 Year     3 Years    5 Years   10 Years
             $222       $341       $375       $476



       7.  Is the Fund Managed?
           Unlike a mutual fund, the Fund is not managed and bonds are
           not sold because of market changes. Rather, experienced
           Defined Asset Funds financial analysts regularly review the
           bonds in the Fund. The Fund may sell a bond if certain
           adverse credit or other conditions exist.
       8.  How do I Buy Units?
           You can buy units from any of the Sponsors and other
           broker-dealers. The Sponsors are listed later in this
           prospectus. Some banks may offer units for sale through
           special arrangements with the Sponsors, although certain
           legal restrictions may apply.
           The minimum investment is $250.
           Unit Price per 1,000 Units           $1,036.83
           (as of April 22, 1999)
           Unit price is based on the net asset value of the Fund plus
           the up-front sales fee. An amount equal to any principal
           cash, as well as net accrued but undistributed interest on
           the unit, is added to the unit price. Unit price also
           includes the estimated organization costs shown on the
           previous page, to which no sales fee has been applied. An
           independent evaluator prices the bonds at 3:30 p.m. Eastern
           time every business day. Unit price changes every day with
           changes in the prices of the bonds in the Fund.
           Unit Par Value                               $1.00
           Unit par value means the total amount of money you should
           generally receive on each unit by the termination of the
           Fund (other than interest and premium on the bonds). This
           total amount assumes that all bonds in the Fund are either
           paid at maturity or called by the issuer at par or are sold
           by the Fund at par. If you sell your units before the Fund
           terminates, you may receive more or less than the unit par
           value.

       9.  How do I Sell Units?
           You may sell your units at any time to any
           Sponsor or the Trustee for the net asset
           value determined at the close of business on
           the date of sale, less any remaining deferred
           sales fee. You will not pay any other fee
           when you sell your units.


                                       5
<PAGE>
   
      10.  How are Distributions Made and Taxed?
           The Fund pays income twice a year. In the opinion of bond
           counsel when each bond was issued, interest on the bonds in
           this Fund is generally 100% exempt from regular federal
           income tax. However, interest on approximately 40% of the
           bonds will be a preference item for Alternative Minimum
           Tax. A portion of the income may also be exempt from state
           and local personal income taxes, depending on where you
           live.
           You will also receive principal payments if bonds are sold
           or called or mature, when the cash available is more than
           $10.00 per 1,000 units. You will be subject to tax on any
           gain realized by the Fund on the disposition of bonds.
      11.  What Other Services are Available?
           Reinvestment
           You will receive your income in cash unless you choose to
           compound your income by reinvesting at no sales fee in the
           Municipal Fund Investment Accumulation Program, Inc. This
           program is an open-end mutual fund with a comparable
           investment objective. Income from this program will
           generally be subject to state and local income taxes. For
           more complete information about the program, including
           charges and fees, ask the Trustee for the program's
           prospectus. Read it carefully before you invest. The
           Trustee must receive your written election to reinvest at
           least 10 days before the record day of an income payment.
           Exchange Privileges
           You may exchange units of this Fund for units of certain
           other Defined Asset Funds. You may also exchange into this
           Fund from certain other funds. We charge a reduced sales
           fee on exchanges.
    

                                       6
<PAGE>
- --------------------------------------------------------------------------------
    Tax-Free vs. Taxable Income: A Comparison Of Taxable and Tax-Free Yields

<TABLE>
<CAPTION>

                                  Effective
Taxable Income 1999*               % Tax                         Tax-Free Yield of
  Single Return    Joint Return   Bracket    3%     3.5%     4%     4.5%     5%     5.5%     6%     6.5%
                                                        Is Equivalent to a Taxable Yield of
- ----------------------------------------------------------------------------------------------------------
<S>        <C>    <C>       <C>      <C>       <C>    <C>      <C>    <C>      <C>     <C>     <C>     <C>
 $      0- 25,750 $      0- 43,050   15.00     3.53   4.12     4.71   5.29     5.88    6.47    7.06    7.65
- ----------------------------------------------------------------------------------------------------------
$ 25,751- 62,450 $ 43,051-104,050   28.00     4.17   4.86     5.56   6.25     6.94    7.64    8.33    9.03
- ----------------------------------------------------------------------------------------------------------
$ 62,451-130,250 $104,051-158,550   31.00     4.35   5.07     5.80   6.52     7.25    7.97    8.70    9.42
- ----------------------------------------------------------------------------------------------------------
$130,251-283,150 $158,551-283,150   36.00     4.69   5.47     6.25   7.03     7.81    8.59    9.38   10.16
- ----------------------------------------------------------------------------------------------------------
Over $283,151       Over $283,151   39.60     4.97   5.79     6.62   7.45     8.28    9.11    9.93   10.76
- ----------------------------------------------------------------------------------------------------------
</TABLE>


To compare the yield of a taxable security with the yield of a federally
tax-free security, find your taxable income and read across. The table
incorporates 1999 federal income tax rates and assumes that all income would
otherwise be taxed at a U.S. investor's highest tax rate. Yield figures are for
example only.

*Based upon net amount subject to federal income tax after deductions and
exemptions. This table does not reflect the possible effect of other tax
factors, such as alternative minimum tax, personal exemptions, the phase-out of
exemptions, itemized deductions, the possible partial disallowance of deductions
or state and local taxation. Consequently, investors are urged to consult their
own tax advisers in this regard.

                Municipal Bonds and The Alternative Minimum Tax


      INCOME+        MAXIMUM 'PREFERENCE' INCOME
                        WITHOUT TRIGGERING AMT
                       (state income tax rates)
Single ++ Joint ++      0%        7%       11%
- --------------------------------------------------
          $50,000    $21,000   $16,000   $13,000
- --------------------------------------------------
$30,000              $20,000   $16,000   $14,000
- --------------------------------------------------
          $100,000   $25,000   $16,000   $11,000
- --------------------------------------------------
$55,000              $22,000   $16,000   $13,000
- --------------------------------------------------
          $225,000   $30,000   $13,000   $ 4,000
- --------------------------------------------------
$205,000             $30,000   $14,000   $ 6,000
- --------------------------------------------------


Notes:
+ Regular taxable income plus state income
  taxes and personal exemptions.
 ++ Assuming no dependents.
     Under federal tax law, interest income on certain municipal bonds, although
exempt from regular income tax, is treated as a 'preference' item for purposes
of AMT. The table above shows amounts of such municipal bond 'preference'
interest income, assuming no other 'preference' or similar items apply, that
individual taxpayers could receive in 1999 without becoming subject to the AMT.
The table gives information for single and joint returns of U.S. individuals
having no dependents. The table provides three income levels and three
hypothetical state income tax rates. The table further assumes that the stated
amount of municipal bond 'preference' interest income is subject to state income
taxes.

                                       7
<PAGE>
What You Can Expect From Your Investment

Income Twice A Year

The Fund will pay you regular income twice a year. Your income may vary because
of:
   o elimination of one or more bonds from the Fund's portfolio because of
     calls, redemptions or sales;
   o a change in the Fund's expenses; or
   o the failure by a bond's issuer to pay interest.

Changes in interest rates generally will not affect your income because the
portfolio is fixed.

Along with your income, you will receive your share of any available bond
principal.

Return Figures

We cannot predict your actual return, which will vary with unit price, how long
you hold your investment and changes in the portfolio, interest income and
expenses.

Estimated Current Return equals the estimated annual cash to be received from
the bonds in the Fund less estimated annual Fund expenses, divided by the Unit
Price (including the maximum sales fee):


 Estimated Annual                  Estimated
 Interest Income        -       Annual Expenses
- -------------------------------------------------
                   Unit Price


Estimated Long Term Return is a measure of the estimated return over the
estimated life of the Fund. Unlike Estimated Current Return, Estimated Long Term
Return reflects maturities, discounts and premiums of the bonds in the Fund. It
is an average of the yields to maturity (or in certain cases, to an earlier call
date) of the individual bonds in the portfolio, adjusted to reflect the Fund's
maximum sales fee and estimated expenses. We calculate the average yield for the
portfolio by weighting each bond's yield by its market value and the time
remaining to the call or maturity date.

Yields on individual bonds depend on many factors including general conditions
of the bond markets, the size of a particular offering and the maturity and
quality rating of the particular issues. Yields can vary among bonds with
similar maturities, coupons and ratings.

These return quotations are designed to be comparative rather than predictive.

Records and Reports

You will receive:
o a statement of income payments twice a year;
o a notice from the Trustee when new bonds are deposited in exchange or
  substitution for bonds originally deposited;
o an annual report on Fund activity; and
o annual tax information. This will also be sent to the IRS. You must report the
  amount of tax-exempt interest received during the year.

You may request:
o copies of bond evaluations to enable you to comply with federal and state tax
  reporting requirements; and
o audited financial statements of the Fund.

You may inspect records of Fund transactions at the Trustee's office during
regular business hours.

                                       8
<PAGE>
The Risks You Face

   
Ratings Risk

The Portfolio contains bonds rated in the BBB category by Fitch, which is the
lowest 'investment grade' rating assigned by the rating agency. The Portfolio
may also contain bonds which are not rated but which have in the opinion of the
Credit Consultant, comparable credit characteristics to bonds rated investment
grade. These bonds may have speculative characteristics and changes in economic
conditions or other circumstances are more likely to lead to a weakened capacity
to make principal and interest payments on these bonds than is the case with
higher rated bonds.

Subsequent to the initial date of deposit, a bond or other obligation of the
issuer or guarantor or bank or other entity issuing a letter of credit related
thereto may cease to be rated, its rating may be reduced or the credit
assessment of the Credit Consultant may change. None of these events requires an
elimination of that bond from the Portfolio, but the lowered rating or changed
credit assessment may be considered in the Sponsors' determination to direct the
disposal of the bond.

The opinions provided to the Agent for the Sponsors by the Credit Consultant on
unrated bonds will not be traditional ratings because:
   o they will generally not be based on the level of information or access to
     public officials generally utilized in connection with a traditional credit
     rating;
   o they are likely to be given on an expedited basis; and
   o they will generally not be based on formal procedures normally associated
     with traditional credit ratings, such as the use of a rating committee.

Therefore, the Credit Consultant's opinions on credit quality are likely to have
less certainty than traditional credit ratings. However, the Credit Consultant
will render an opinion only when in the judgement of its analysts it has
sufficient information to determine whether a bond has investment grade credit
characteristics.
    

Interest Rate Risk

Investing involves risks, including the risk that your investment will decline
in value if interest rates rise. Generally, bonds with longer maturities will
change in value more than bonds with shorter maturities. Bonds in the Fund are
more likely to be called when interest rates decline. This would result in early
returns of principal to you and may result in early termination of the Fund. Of
course, we cannot predict how interest rates may change.

Call Risk

Many bonds can be prepaid or 'called' by the issuer before their stated
maturity. For example, some bonds may be required to be called pursuant to
mandatory sinking fund provisions.

Also, an issuer might call its bonds during periods of falling interest rates,
if the issuer's bonds have a coupon higher than current market rates.

An issuer might call its bonds in extraordinary cases, including if:
   o it no longer needs the money for the original purpose;
   o the project is condemned or sold;
   o the project is destroyed and insurance proceeds are used to redeem the
     bonds;
   o any related credit support expires and is not replaced; or
   o interest on the bonds become taxable.

If the bonds are called, your income will decline and you may not be able to
reinvest the

                                       9
<PAGE>
money you receive at as high a yield or as long a maturity. An early call at par
of a premium bond will reduce your return.

Reduced Diversification Risk

If many investors sell their units, the Fund will have to sell bonds. This could
reduce the diversification of your investment and increase your share of Fund
expenses.

Liquidity Risk

   
Debt rated below investment grade or having similar credit characteristics also
tends to be more thinly traded than investment-grade debt and held primarily by
institutions, and this lack of liquidity can negatively affect the value of the
debt.
    

The bonds will generally trade in the over-the-counter market. We cannot assure
you that a liquid trading market will exist, especially since current law may
restrict the Fund from selling bonds to any Sponsor. The value of the bonds, and
of your investment, may be reduced if trading in bonds is limited or absent.

Bond Quality Risk

A reduction in a bond's rating may decrease its value and, indirectly, the value
of your investment in the Fund.

Insurance Related Risk

Some bonds are backed by insurance companies (as shown under Defined Portfolio).
Insurance policies generally make payments only according to a bond's original
payment schedule and do not make early payments when a bond defaults or becomes
taxable. Although the federal government does not regulate the insurance
business, various state laws and federal initiatives and tax law changes could
significantly affect the insurance business. The claims-paying ability of the
insurance companies is generally rated AAA by Standard & Poor's or another
nationally recognized rating organization. The insurance company ratings are
subject to change at any time at the discretion of the rating agencies.
   

Concentration Risk

Here is what you should know about the Fund's concentration in bonds of
financial institutions.

The profitability of a financial institution depends to a great extent on the
credit quality of its loan portfolio, which is affected by:
   o the institution's underwriting criteria;
   o Concentrations within its loan portfolio; and
   o general economic conditions.

A financial institution's operating performance is also impacted by:
   o changes in interest rates;
   o availability and cost of funds;
   o intensity of competition; and
   o degree of government regulation.

Litigation and Legislation Risks
    

We do not know of any pending litigation that might have a material adverse
effect upon the Fund.

Future tax legislation could affect the value of the portfolio by:
   o limiting real property taxes,
   o reducing tax rates,
   o imposing a flat or other form of tax, or
   o exempting investment income from tax.

Selling or Exchanging Units

You can sell your units at any time for a price based on net asset value. Your
net asset value is calculated each business day by:

                                       10
<PAGE>
   o adding the value of the bonds, net accrued interest, cash and any other
     Fund assets;
   o subtracting accrued but unpaid Fund expenses, unreimbursed Trustee
      advances, cash held to buy back units or for distribution to investors and
     any other Fund liabilities; and
   o dividing the result by the number of outstanding units.

Your net asset value when you sell may be more or less than your cost because of
sales fees, market movements and changes in the portfolio.

As of the close of the initial offering period, the price you receive will be
reduced to reflect estimated organization costs.

If you sell your units before the final deferred sales fee installment, the
amount of any remaining installments will be deducted from your proceeds.

Sponsors' Secondary Market

While we are not obligated to do so, we will buy back units at net asset value
without any other fee or charge other than any remaining deferred sales charge.
We may resell the units to other buyers or to the Trustee. You should consult
your financial professional for current market prices to determine if other
broker-dealers or banks are offering higher prices.

   
We have maintained a secondary market continuously for over 28 years, but we
could discontinue it without prior notice for any business reason.
    

Selling Units to the Trustee

Regardless of whether we maintain a secondary market, you can sell your units to
the Trustee at any time by sending the Trustee a letter (with any outstanding
certificates if you hold Unit certificates). You must properly endorse your
certificates (or execute a written transfer instrument with signatures
guaranteed by an eligible institution). Sometimes, additional documents are
needed such as a trust document, certificate of corporate authority, certificate
of death or appointment as executor, administrator or guardian.

Within seven days after your request and the necessary documents are received,
the Trustee will mail a check to you. Contact the Trustee for additional
information.

As long as we are maintaining a secondary market, the Trustee will sell your
units to us at a price based on net asset value. If there is no secondary
market, the Trustee may sell your units in the over-the-counter market for a
higher price, but it is not obligated to do so. In that case, you will receive
the net proceeds of the sale.

If the Fund does not have cash available to pay you for units you are selling,
the agent for the Sponsors will select bonds to be sold. Bonds will be selected
based on market and credit factors. These sales could be made at times when the
bonds would not otherwise be sold and may result in your receiving less than the
unit par value and also reduce the size and diversity of the Fund.

If you acquire 25% or more of the outstanding units of the Fund and you sell
units with a value exceeding $250,000, the Trustee may choose to pay you 'in
kind' by distributing bonds and cash with a total value equal to the price of
those units. The Trustee will try to distribute bonds in the portfolio pro rata,
but it reserves the right to distribute only one or a

                                       11
<PAGE>
few bonds. The Trustee will act as your agent in an in kind distribution and
will either hold the bonds for your account or sell them as you instruct. You
must pay any transaction costs as well as transfer and ongoing custodial fees on
sales of bonds distributed in kind.

There could be a delay in paying you for your units:
   o if the New York Stock Exchange is closed (other than customary weekend and
      holiday closings);
   o if the SEC determines that trading on the New York Stock Exchange is
     restricted or that an emergency exists making sale or evaluation of the
     bonds not reasonably practicable; and
   o for any other period permitted by SEC order.

Exchange Option

You may exchange units of certain Defined Asset Funds for units of this Fund at
a maximum exchange fee of 1.75%. You may exchange units of this Fund for units
of certain other funds at a reduced sales fee if your investment goals change.
To exchange units, you should talk to your financial professional about what
funds are exchangeable, suitable and currently available.

Normally, an exchange is taxable and you must recognize any gain or loss on the
exchange. However, the IRS may try to disallow a loss if the portfolios of the
two funds are not materially different; you should consult your own tax adviser.

We may amend or terminate this exchange option at any time without notice.

                                       12
<PAGE>
How The Fund Works

Pricing

The price of a unit includes interest accrued on the bonds, less expenses, from
the initial date of deposit up to, but not including, the settlement date, which
is usually three business days after the purchase date of the unit.

Bonds also carry accrued but unpaid interest up to the initial date of deposit.
To avoid having you pay this additional accrued interest (which earns no return)
when you buy, the Trustee advances this amount to the Sponsors. The Trustee
recovers this advance from interest received on the bonds.

In addition, a portion of the price of a unit also consists of cash to pay all
or some of the costs of organizing the Fund including:
   o cost of initial preparation of legal documents;
   o federal and state registration fees;
   o initial fees and expenses of the Trustee;
   o initial audit; and
   o legal expenses and other out-of-pocket expenses.

No sales fee is applied to these organization costs.

Evaluations

An independent Evaluator values the bonds on each business day (excluding
Saturdays, Sundays and the following holidays as observed by the New York Stock
Exchange: New Year's Day, Presidents' Day, Martin Luther King, Jr. Day, Good
Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas).
Bond values are based on current bid or offer prices for the bonds or comparable
bonds. In the past, the difference between bid and offer prices of publicly
offered tax-exempt bonds has ranged from 0.5% of face amount on actively traded
issues to 3.5% on inactively traded issues; the difference has averaged between
1 and 2%.

Income

Interest on any bonds purchased on a when-issued basis or for a delayed delivery
does not begin to accrue until the bonds are delivered to the Fund. The Trustee
may reduce its fee to provide you with tax-exempt income for this non-accrual
period. If a bond is not delivered on time and the Trustee's annual fee and
expenses do not cover the additional accrued interest, we will treat the
contract to buy the bond as failed.

The Trustee credits interest to an Income Account and other receipts to a
Capital Account. The Trustee may establish a Reserve Account by withdrawing from
these accounts amounts it considers appropriate to pay any material liability.
These accounts do not bear interest.

Expenses

The Trustee is paid monthly. It also benefits when it holds cash for the Fund in
non-interest bearing accounts. The Trustee may also receive additional amounts:
   o to reimburse the Trustee for the Fund's operating expenses;
   o for extraordinary services and costs of indemnifying the Trustee and the
      Sponsors;
   o costs of actions taken to protect the Fund and other legal fees and
     expenses;
   o expenses for keeping the Fund's registration statement current; and

                                       13
<PAGE>
   o Fund termination expenses and any governmental charges.

The Sponsors are currently reimbursed up to 45 cents per $1,000 face amount
annually for providing portfolio supervisory, bookkeeping and administrative
services and for any other expenses properly chargeable to the Fund. Legal,
typesetting, electronic filing and regulatory filing fees and expenses
associated with updating the Fund's registration statement yearly are also now
chargeable to the Fund. While this fee may exceed the amount of these costs and
expenses attributable to this Fund, the total of these fees for all Series of
Defined Asset Funds will not exceed the aggregate amount attributable to all of
these Series for any calendar year. Certain of these expenses were previously
paid for by the Sponsors. The Fund also pays the Evaluator's fees.

The Trustee's, Sponsors' and Evaluator's fees may be adjusted for inflation
without investors' approval.

Quarterly deferred sales charges you owe are paid with interest and principal
from certain bonds. If these amounts are not enough, the rest will be paid out
of distributions to you from the Fund's Capital and Income Accounts.

The Sponsors will pay advertising and selling expenses at no charge to the Fund.
If Fund expenses exceed initial estimates, the Fund will owe the excess. The
Trustee has a lien on Fund assets to secure reimbursement of Fund expenses and
may sell bonds if cash is not available.

Portfolio Changes

The Sponsors and Trustee are not liable for any default or defect in a bond; if
a contract to buy any bond fails in the first 90 days of the Fund, we generally
will deposit a replacement tax-exempt bond with a similar yield, maturity,
rating and price.

Unlike a mutual fund, the portfolio is designed to remain intact and we may keep
bonds in the portfolio even if their credit quality declines or other adverse
financial circumstances occur. However, we may sell a bond in certain cases if
we believe that certain adverse credit conditions exist or if a bond becomes
taxable.

If we maintain a secondary market in units but are unable to sell the units that
we buy in the secondary market, we will redeem units, which will affect the size
and composition of the portfolio. Units offered in the secondary market may not
represent the same face amount of bonds that they did originally.

We decide whether or not to offer units for sale that we acquire in the
secondary market after reviewing:
   o diversity of the portfolio;
   o size of the Fund relative to its original size;
   o ratio of Fund expenses to income;
   o current and long-term returns;
   o degree to which units may be selling at a premium over par; and
   o cost of maintaining a current prospectus.

Fund Termination

The Fund will terminate following the stated maturity or sale of the last bond
in the portfolio. The Fund may also terminate earlier with the consent of
investors holding 51% of

                                       14
<PAGE>
the units or if total assets of the Fund have fallen below 40% of the face
amount of bonds deposited. We will decide whether to terminate the Fund early
based on the same factors used in deciding whether or not to offer units in the
secondary market.

When the Fund is about to terminate you will receive a notice, and you will be
unable to sell your units after that time. On or shortly before termination, we
will sell any remaining bonds, and you will receive your final distribution. Any
bond that cannot be sold at a reasonable price may continue to be held by the
Trustee in a liquidating trust pending its final sale.

You will pay your share of the expenses associated with termination, including
brokerage costs in selling bonds. This may reduce the amount you receive as your
final distribution.

Certificates

Certificates for units are issued on request. You may transfer certificates by
complying with the requirements for redeeming certificates, described above. You
can replace lost or mutilated certificates by delivering satisfactory indemnity
and paying the associated costs.

Trust Indenture

The Fund is a 'unit investment trust' governed by a Trust Indenture, a contract
among the Sponsors, the Trustee and the Evaluator, which sets forth their duties
and obligations and your rights. A copy of the Indenture is available to you on
request to the Trustee. The following summarizes certain provisions of the
Indenture.

The Sponsors and the Trustee may amend the Indenture without your consent:
   o to cure ambiguities;
   o to correct or supplement any defective or inconsistent provision;
   o to make any amendment required by any governmental agency; or
   o to make other changes determined not to be materially adverse to your best
     interest (as determined by the Sponsors).
Investors holding 51% of the units may amend the Indenture. Every investor must
consent to any amendment that changes the 51% requirement. No amendment may
reduce your interest in the Fund without your written consent.

The Trustee may resign by notifying the Sponsors. The Sponsors may remove the
Trustee without your consent if:
   o it fails to perform its duties and the Sponsors determine that its
     replacement is in your best interest; or
   o it becomes incapable of acting or bankrupt or its affairs are taken over by
      public authorities.
Investors holding 51% of the units may remove the Trustee. The Evaluator may
resign or be removed by the Sponsors and the Trustee without the consent of
investors. The resignation or removal of either becomes effective when a
successor accepts appointment. The Sponsors will try to appoint a successor
promptly; however, if no successor has accepted within 30 days after notice of
resignation, the resigning Trustee or Evaluator may petition a court to appoint
a successor.

Any Sponsor may resign as long as one Sponsor with a net worth of $2 million
remains and agrees to the resignation. The remaining Sponsors and the Trustee
may appoint a replacement. If there is only one

                                       15
<PAGE>
Sponsor and it fails to perform its duties or becomes bankrupt the Trustee may:
   o remove it and appoint a replacement Sponsor;
   o liquidate the Fund; or
   o continue to act as Trustee without a Sponsor.

Merrill Lynch, Pierce, Fenner & Smith Incorporated acts as agent for the
Sponsors.

The Trust Indenture contains customary provisions limiting the liability of the
Trustee, the Sponsors and the Evaluator.

Legal Opinion

Davis Polk & Wardwell, 450 Lexington Avenue, New York, New York 10017, as
special counsel for the Sponsors, has given an opinion that the units are
validly issued.

Auditors
Deloitte & Touche LLP, 2 World Financial Center, New York, New York 10281,
independent accountants, audited the Statement of Condition included in this
prospectus.

   
Sponsors

The Sponsors and their underwriting percentages are:
Merrill Lynch, Pierce, Fenner & Smith Incorporated (a wholly-owned subsidiary of
Merrill Lynch & Co., Inc.)
P.O. Box 9051,
Princeton, NJ 08543-9051                                                  58.35%
Salomon Smith Barney Inc. (an indirectly wholly-owned subsidiary of Citigroup
Inc.)
388 Greenwich Street--23rd Floor,
New York, NY 10013                                                        14.53%
Dean Witter Reynolds Inc. (a principal operating subsidiary of Morgan Stanley
Dean Witter & Co.)
Two World Trade Center--59th Floor,
New York, NY 10048                                                        19.37%
PaineWebber Incorporated (a wholly-owned subsidiary of PaineWebber Group Inc.)
1285 Avenue of the Americas,
New York, NY 10019                                                         7.75%

                                                100.00%
    

Each Sponsor is a Delaware corporation and it, or its predecessor, has acted as
sponsor to many unit investment trusts. As a registered broker-dealer each
Sponsor buys and sells securities (including investment company shares) for
others (including investment companies) and participates as an underwriter in
various selling groups.

Trustee

   
The Chase Manhattan Bank, Unit Investment Trust Department, 4 New York
Plaza--6th Floor, New York, New York 10004, is the Trustee. It is supervised by
the Federal Deposit Insurance Corporation, the Board of Governors of the Federal
Reserve System and New York State banking authorities.
    

                                       16
<PAGE>
   
The Credit Consultant

The Credit Consultant, Fitch IBCA, Inc., is a Nationally Recognized Statistical
Rating Organization, whose primary business is to provide credit ratings on
bonds issued by states and municipalities and their instrumentalities and
political subdivisions, industrial companies, utilities, financial institutions,
and issuers of mortgage-and asset-backed securities.

The Credit Consultant is registered as an investment adviser with the Securities
and Exchange Commission ('SEC') and various states.

Fitch ratings and credit opinions are not recommendations to buy, sell, or hold
any bond.

Fitch ratings are based on information obtained from issuers, other obligors,
underwriters, their experts, and other sources Fitch believes to be reliable.
Fitch does not audit or verify the truth or accuracy of the information. Ratings
are subject to change, suspension, or withdraw.
    

Underwriters' and Sponsors' Profits

Underwriters receive sales charges when they sell units. Sponsors also realize a
profit or loss on deposit of the bonds shown under Defined Portfolio. Any cash
made available by you to the Sponsors before the settlement date for those units
may be used in the Sponsors' businesses to the extent permitted by federal law
and may benefit the Sponsors.

A Sponsor or Underwriter may realize profits or sustain losses on bonds in the
Fund which were acquired from underwriting syndicates of which it was a member.
We bought approximately    % of the bonds in the portfolio from one or more of
the Sponsors (as sole underwriter, managing underwriter or member of an
underwriting syndicate).

During the initial offering period, the Sponsors also may realize profits or
sustain losses on units they hold. In maintaining a secondary market, the
Sponsors will also realize profits or sustain losses in the amount of any
difference between the prices at which they buy units and the prices at which
they resell or redeem them.

Public Distribution

During the initial offering period, units will be distributed to the public by
the Sponsors and dealers who are members of the National Association of
Securities Dealers, Inc. This period is 30 days or less if all units are sold.
The Sponsors may extend the initial period up to 120 days.

The Sponsors do not intend to qualify units for sale in any foreign countries.
This prospectus does not constitute an offer to sell units in any country where
units cannot lawfully be sold.

In the initial offering period, the concession to dealers will be $17 per 1,000
units. We may change the concession at any time. Dealers may resell units to
other dealers with a concession not in excess of the original concession to
dealers.

Code of Ethics

Merrill Lynch, as agent for the Sponsors, has adopted a code of ethics requiring
preclearance and reporting of personal securities transactions by its employees
with access to information on portfolio transactions. The goal of the code is to
prevent fraud, deception or misconduct against the Fund and to provide
reasonable standards of conduct.

                                       17
<PAGE>
Year 2000 Issues

Many computer systems were designed in such a way that they may be unable to
distinguish between the year 2000 and the year 1900 (commonly known as the 'Year
2000 Problem'). We do not expect that the computer system changes necessary to
prepare for the Year 2000 will cause any major operational difficulties for the
Fund. The Year 2000 Problem may adversely affect the issuers of the Securities
contained in the portfolio, but we cannot predict whether any impact will be
material to the Fund as a whole.

Taxes

The following summary describes some of the important income tax consequences of
holding units. It assumes that you are not a dealer, financial institution,
insurance company or other investor with special circumstances. You should
consult your own tax adviser about your particular circumstances.

At the date of issue of each bond, counsel for the issuer delivered an opinion
to the effect that interest on the bond is exempt from regular federal income
tax. However, interest may be subject to state and local taxes and federal
alternative minimum tax. Neither we nor our counsel have reviewed the issuance
of the bonds, related proceedings or the basis for the opinions of counsel for
the issuers. We cannot assure you that the issuer (or other users of bond
proceeds) have complied or will comply with any requirements necessary for a
bond to be tax-exempt. If any of the bonds were determined not to be tax-exempt,
you could be required to pay income tax for current and prior years, and if the
Fund were to sell the bond, it might have to sell it at a substantial discount.

In the opinion of our counsel, under existing law:

General Treatment of the Fund and Your Investment

The Fund will not be taxed as a corporation for federal income tax purposes, and
you will be considered to own directly your share of each bond in the Fund.

Gain or Loss Upon Disposition

When all or part of your share of a bond is disposed of (for example, when the
Fund sells, exchanges or redeems a bond or when you sell or exchange your
units), you will generally recognize capital gain or loss. Your gain, however,
will generally be ordinary income to the extent of any accrued 'market
discount'. Generally you will have market discount to the extent that your basis
in a bond when you purchase a unit is less than its stated redemption price at
maturity (or, if it is an original issue discount bond, the issue price
increased by original issue discount that has accrued on the bond before your
purchase). You should consult your tax adviser in this regard.

If your net long-term capital gains exceed your net short-term capital losses,
the excess may be subject to tax at a lower rate than ordinary income. Any
capital gain from the Fund will be long-term if you are considered to have held
your investment on each bond for more than one year and short-term if you held
it for one year or less. If you are an individual and sell or otherwise dispose
of your units after holding them for more than one year, you may be entitled to
a 20% maximum federal tax rate

                                       18
<PAGE>
on any resulting gains. Consult your tax adviser in this regard. Because the
deductibility of capital losses is subject to limitations, you may not be able
to deduct all of your capital losses.

Your Basis in the Bonds

Your aggregate basis in the bonds will be equal to the cost of your units,
including any sales charges and the organizational expenses you pay, adjusted to
reflect any accruals of 'original issue discount,' 'acquisition premium' and
'bond premium'. You should consult your tax adviser in this regard.

Expenses

If you are not a corporate investor, you will not be entitled to a deduction for
your share of fees and expenses of the Fund. Also, if you borrowed money in
order to purchase or carry your units, you will not be able to deduct the
interest on this borrowing for federal income tax purposes. The IRS may treat
your purchase of units as made with borrowed money even if the money is not
directly traceable to the purchase of units.

State and Local Taxes

Under the income tax laws of the State and City of New York, the Fund will not
be taxed as a corporation. If you are a New York taxpayer, your income from the
Fund will not be tax-exempt in New York except to the extent that the income is
earned on bonds that are tax-exempt for New York purposes. Depending on where
you live, your income from the Fund may be subject to state and local taxation.
You should consult your tax adviser in this regard.

Supplemental Information

You can receive at no cost supplemental information about the Fund by calling
the Trustee. The supplemental information includes more detailed risk disclosure
about the types of bonds that may be in the Fund's portfolio, general risk
disclosure concerning any insurance securing certain bonds, and general
information about the structure and operation of the Fund. The supplemental
information is also available from the SEC.

                                       19
<PAGE>
   
                       REPORT OF INDEPENDENT ACCOUNTANTS

The Sponsors, Trustee and Holders of Municipal Investment Trust Fund, Investment
Grade Portfolio--11 (BBB Quality or Better), Long-Intermediate Term Series,
Defined Asset Funds (the 'Fund'):

We have audited the accompanying statement of condition and the related defined
portfolio included in the prospectus of the Fund as of April 23, 1999. This
financial statement is the responsibility of the Trustee. Our responsibility is
to express an opinion on this financial statement based on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statement is free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statement. Our procedures included
confirmation of cash and an irrevocable letter of credit deposited for the
purchase of securities, as described in the statement of condition, with the
Trustee. An audit also includes assessing the accounting principles used and
significant estimates made by the Trustee, as well as evaluating the overall
financial statement presentation. We believe that our audit provides a
reasonable basis for our opinion.

In our opinion, the financial statement referred to above presents fairly, in
all material respects, the financial position of the Fund as of April 23, 1999
in conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP
NEW YORK, N.Y.
APRIL 23, 1999
                  Statement of Condition As of April 23, 1999

Trust Property


Investments--Bonds and Contracts to purchase Bonds(1)    $      10,579,454.25
Cash                                                                80,418.72
Accrued interest to Initial Date of Deposit on underlying
  Bonds                                                             20,650.00
                                                         --------------------
           Total                                         $      10,680,522.97
                                                         --------------------
                                                         --------------------
Liabilities and Interest of Holders
Liabilities: Advance by Trustee for accrued interest (2) $          80,418.72
Reimbursement of Sponsors for organization expenses (3)             20,650.00
                                                         --------------------
Subtotal                                                           101,068.72
                                                         --------------------
Interest of Holders of 10,325,000 Units of fractional
  undivided interest outstanding:
Cost to investors (3)(4)(5)                                     10,705,316.00
Organization expenses (3) and gross underwriting
  commissions(4)                                                  (125,861.75)
                                                         --------------------
Subtotal                                                        10,579,454.25
                                                         --------------------
           Total                                         $      10,680,522.97
                                                         --------------------
                                                         --------------------


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

          (1) Aggregate cost to the Fund of the bonds listed under Defined
Portfolio is based upon the offer side evaluation determined by the Evaluator at
the evaluation time on the business day prior to the Initial Date of Deposit.
The contracts to purchase the bonds are collateralized by an irrevocable letter
of credit which has been issued by DBS Bank, New York Branch, in the amount of
$3,786,672.05 and deposited with the Trustee. The amount of the letter of credit
includes $3,773,648.75 for the purchase of $3,775,000 face amount of the bonds,
plus $13,023.30 for accrued interest.
          (2) Representing a special distribution to the Sponsors by the Trustee
of an amount equal to the accrued interest on the bonds.
          (3) A portion of the Unit Price consists of cash in an amount
sufficient to pay for costs incurred in establishing the Fund. These costs have
been estimated at $2.00 per 1,000 Units. A distribution will be made at the
close of the initial offering period to an account maintained by the Trustee
from which the organization expense obligation of the investors will be
satisfied.
          (4) Assumes the maximum up-front sales fee per 1,000 units of 1.00% of
the Unit Price. A deferred sales fee of $17.50 per 1,000 Units is payable over a
two-year period ($2.19 per 1,000 Units quarterly in the first six quarters and
$2.18 per 1,000 units quarterly in the last two quarters). Distributions will be
made to an account maintained by the Trustee from which the deferred sales fee
obligation of the investors will be satisfied. If units are redeemed prior to
the final deferred sales charge deduction, the remaining portion of the deferred
sales fee applicable to such units will be transferred to the account on the
redemption date.
          (5) Aggregate Unit Price (exclusive of interest) computed on the basis
of the offer side evaluation of the underlying bonds as of the evaluation time
on the business day prior to the Initial Date of Deposit.
    

                                       20

<PAGE>
                             Defined
                             Asset FundsSM

   


Have questions ?                         Municipal Investment Trust Fund
Request the most recent free             Investment Grade Portfolio--11
Information Supplement                   (BBB Quality or Better)
that gives more details about            Long-Intermediate Term Series
the Fund, by calling:                    (A Unit Investment Trust)
The Chase Manhattan Bank                 ---------------------------------------
1-800-323-1508                           This Prospectus does not contain
    
                                         complete information about the
                                         investment company filed with the
                                         Securities and Exchange Commission in
                                         Washington, D.C. under the:
                                         o Securities Act of 1933 (file no.
                                         333-70583) and
                                         o Investment Company Act of 1940 (file
                                         no. 811-1777).
                                         To obtain copies at prescribed rates--
                                         Write: Public Reference Section of the
                                         Commission
                                         450 Fifth Street, N.W., Washington,
                                         D.C. 20549-6009
                                         Call: 1-800-SEC-0330.
                                         Visit: http://www.sec.gov.
                                         ---------------------------------------
                                         No person is authorized to give any
                                         information or representations about
                                         this Fund not contained in this
                                         Prospectus or the Information
                                         Supplement, and you should not rely on
                                         any other information.
                                         ---------------------------------------
                                         When units of this Fund are no longer
                                         available, this Prospectus may be used
                                         as a preliminary prospectus for a
                                         future series, but some of the
                                         information in this Prospectus will be
                                         changed for that series.
                                         Units of any future series may not be
                                         sold nor may offers to buy be accepted
                                         until that series has become effective
                                         with the Securities and Exchange
                                         Commission. No units can be sold in any
                                         State where a sale would be illegal.

   

                                                           --4/99
    

<PAGE>
                                    PART II
             Additional Information Not Included in the Prospectus


A. The  following  information  relating to the  Depositors is  incorporated  by
reference  to the SEC filings  indi- cated and made a part of this  Registration
Statement.

 I. Bonding arrangements of each of the Depositors are incorporated by reference
to Item A of Part II to the Registration Statement on Form S-6 under the
Securities Act of 1933 for Municipal Investment Trust Fund, Monthly Payment
Series--573 Defined Asset Funds (Reg. No. 333-08241).

 II. The date of organization of each of the Depositors is set forth in Item B
of Part II to the Registration Statement on Form S-6 under the Securities Act of
1933 for Municipal Investment Trust Fund, Monthly Payment Series--573 Defined
Asset Funds (Reg. No. 333-08241) and is herein incorporated by reference
thereto.

III. The Charter and By-Laws of each of the Depositors are incorporated herein
by reference to Exhibits 1.3 through 1.12 to the Registration Statement on Form
S-6 under the Securities Act of 1933 for Municipal Investment Trust Fund,
Monthly Payment Series--573 Defined Asset Funds (Reg. No. 333-08241).

IV. Information as to Officers and Directors of the Depositors has been filed
pursuant to Schedules A and D of Form BD under Rules 15b1-1 and 15b3-1 of the
Securities Exchange Act of 1934 and is incorporated by reference to the SEC
filings indicated and made a part of this Registration Statement:


Merrill Lynch, Pierce, Fenner & Smith Incorporated               8-7221
Salomon Smith Barney Inc. ................................       8-8177
PaineWebber Incorporated..................................      8-16267
Dean Witter Reynolds Inc. ................................      8-14172


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

     B. The Internal Revenue Service Employer Identification Numbers of the
Sponsors and Trustee are as follows:


   
Merrill Lynch, Pierce, Fenner & Smith Incorporated             13-5674085
Salomon Smith Barney Inc. ................................     13-1912900
PaineWebber Incorporated..................................     13-2638166
Dean Witter Reynolds Inc. ................................     94-0899825
The Chase Manhattan Bank, Trustee.........................     13-4994650
    


                                  UNDERTAKING
The Sponsors undertake that they will not instruct the Trustee to accept from
(i) Asset Guaranty Reinsurance Company, Municipal Bond Investors Assurance
Corporation or any other insurance company affiliated with any of the Sponsors,
in settlement of any claim, less than an amount sufficient to pay any principal
or interest (and, in the case of a taxability redemption, premium) then due on
any Security in accordance with the municipal bond guaranty insurance policy
attached to such Security or (ii) any affiliate of the Sponsors who has any
obligation with respect to any Security, less than the full amount due pursuant
to the obligation, unless such instructions have been approved by the Securities
and Exchange Commission pursuant to Rule 17d-1 under the Investment Company Act
of 1940.

                                      II-1
<PAGE>
                         SERIES OF DEFINED ASSET FUNDS
        DESIGNATED PURSUANT TO RULE 487 UNDER THE SECURITIES ACT OF 1933


                                                                    SEC
     Series Number                                              File Number
- --------------------------------------------------------------------------------
Defined Asset Funds Municipal Defined Fund..................          333-58397


                       CONTENTS OF REGISTRATION STATEMENT
The Registration Statement on Form S-6 comprises the following papers and
documents:

     The facing sheet of Form S-6.

     The Cross-Reference Sheet (incorporated by reference to the Cross-Reference
Sheet to the Registration Statement of Defined Asset Funds Municipal Series,
1933 Act File No. 33-54565).

     The Prospectus.

     Additional Information not included in the Prospectus (Part II).

The following exhibits:


 1.1    --Form of Trust Indenture (incorporated by reference to Exhibit 1.1 to
          the Registration Statement of Municipal Defined Fund Series 2, 1933
          Act File No. 333-61285).
 1.1.1  --Form of Standard Terms and Conditions of Trust Effective October 21,
          1993 (incorporated by reference to Exhibit 1.1.1 to the Registration
          Statement of Municipal Investment Trust Fund, Multistate Series-48,
          1933 Act File No. 33-50247).
 1.2    --Form of Master Agreement Among Underwriters (incorporated by reference
          to Exhibit 1.2 to the Registration Statement of The Corporate Income
          Fund, One Hundred Ninety-Fourth Monthly Payment Series, 1933 Act File
          No. 2-90925).
 2.1    --Form of Certificate of Beneficial Interest (included in Exhibit
        1.1.1).
 3.1    --Opinion of counsel as to the legality of the securities being issued
          including their consent to the use of their name under the headings
          'How The Fund Works--'Legal Opinion' in the Prospectus.
 4.1    --Consent of the Evaluator.
 5.1    --Consent of independent accountants.
 9.1    --Information Supplement (incorporated by reference to Exhibit 9.1 to
          the Registration Statement of Municipal Investment Trust Fund,
          Multistate Series--30, 1933 Act File No. 333-49353).


                                      R-1
<PAGE>
                              DEFINED ASSET FUNDS
                        MUNICIPAL INVESTMENT TRUST FUND
                                   SIGNATURES

     The registrant hereby identifies the series number of Defined Asset Funds
listed on page R-1 for the purposes of the representations required by Rule 487
and represents the following:

     1) That the portfolio securities deposited in the series as to which this
        registration statement is being filed do not differ materially in type
        or quality from those deposited in such previous series;

     2) That, except to the extent necessary to identify the specific portfolio
        securities deposited in, and to provide essential information for, the
        series with respect to which this registration statement is being filed,
        this registration statement does not contain disclosures that differ in
        any material respect from those contained in the registration statements
        for such previous series as to which the effective date was determined
        by the Commission or the staff; and

     3) That it has complied with Rule 460 under the Securities Act of 1933.

   
     Pursuant to the requirements of the Securities Act of 1933, the Registrant
has duly caused this Registration Statement or Amendment to the Registration
Statement to be signed on its behalf by the undersigned thereunto duly
authorized in the City of New York and State of New York on the 23rd day of
April, 1999.
    

               Signatures appear on pages R-3, R-4, R-5 and R-6.

     A majority of the members of the Board of Directors of Merrill Lynch,
Pierce, Fenner & Smith Incorporated has signed this Registration Statement or
Amendment to the Registration Statement pursuant to Powers of Attorney
authorizing the person signing this Registration Statement or Amendment to the
Registration Statement to do so on behalf of such members.

     A majority of the members of the Board of Directors of Salomon Smith Barney
Inc. has signed this Registration Statement or Amendment to the Registration
Statement pursuant to Powers of Attorney authorizing the person signing this
Registration Statement or Amendment to the Registration Statement to do so on
behalf of such members.

     A majority of the members of the Executive Committee of the Board of
Directors of PaineWebber Incorporated has signed this Registration Statement or
Amendment to the Registration Statement pursuant to Powers of Attorney
authorizing the person signing this Registration Statement or Amendment to the
Registration Statement to do so on behalf of such members.

     A majority of the members of the Board of Directors of Dean Witter Reynolds
Inc. has signed this Registration Statement or Amendment to the Registration
Statement pursuant to Powers of Attorney authorizing the person signing this
Registration Statement or Amendment to the Registration Statement to do so on
behalf of such members.

                                      R-2
<PAGE>
               MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
                                   Depositor


By the following persons, who constitute  Powers of Attorney have been filed
  a majority of                             under
  the Board of Directors of Merrill         Form SE and the following 1933 Act
  Lynch, Pierce,                            File
  Fenner & Smith Incorporated:              Number: 333-70593


      HERBERT M. ALLISON, JR.
      GEORGE A. SCHIEREN
      JOHN L. STEFFENS
      By J. DAVID MEGLEN
       (As authorized signatory for Merrill Lynch, Pierce,
       Fenner & Smith Incorporated and
       Attorney-in-fact for the persons listed above)

                                      R-3
<PAGE>
                           SALOMON SMITH BARNEY INC.
                                   Depositor


By the following persons, who constitute a majority of      Powers of Attorney
  the Board of Directors of Salomon Smith Barney Inc.:        have been filed
                                                              under the 1933 Act
                                                              File Numbers:
                                                              333-63417 and
                                                              333-63033


      MICHAEL A. CARPENTER
      DERYCK C. MAUGHAN

      By GINA LEMON
       (As authorized signatory for
       Salomon Smith Barney Inc. and
       Attorney-in-fact for the persons listed above)

                                      R-4
<PAGE>
                            PAINEWEBBER INCORPORATED
                                   Depositor


By the following persons, who constitute  Powers of Attorney have been filed
  the Board of Directors of PaineWebber     under
  Incorporated:                             the following 1933 Act File
                                            Number: 2-61279


      MARGO N. ALEXANDER
      TERRY L. ATKINSON
      BRIAN M. BAREFOOT
      STEVEN P. BAUM
      MICHAEL CULP
      REGINA A. DOLAN
      JOSEPH J. GRANO, JR.
      EDWARD M. KERSCHNER
      JAMES P. MacGILVRAY
      DONALD B. MARRON
      ROBERT H. SILVER
      MARK B. SUTTON
      By
       ROBERT E. HOLLEY
       (As authorized signatory for
       PaineWebber Incorporated
       and Attorney-in-fact for the persons listed above)

                                      R-5
<PAGE>
                           DEAN WITTER REYNOLDS INC.
                                   Depositor


By the following persons, who constitute  Powers of Attorney have been filed
  a majority of                             under Form SE and the following 1933
  the Board of Directors of Dean Witter     Act File Numbers: 33-17085 and
  Reynolds Inc.:                            333-13039


      RICHARD M. DeMARTINI
      ROBERT J. DWYER
      CHRISTINE A. EDWARDS
      JAMES F. HIGGINS
      MITCHELL M. MERIN
      STEPHEN R. MILLER
      RICHARD F. POWERS III
      PHILIP J. PURCELL
      THOMAS C. SCHNEIDER
      WILLIAM B. SMITH
      By
       MICHAEL D. BROWNE
       (As authorized signatory for
       Dean Witter Reynolds Inc.
       and Attorney-in-fact for the persons listed above)

                                      R-6

<PAGE>
                                                                     EXHIBIT 3.1
                             DAVIS POLK & WARDWELL
                              450 LEXINGTON AVENUE
                            NEW YORK, NEW YORK 10017
                                 (212) 450-4000
                                                                  APRIL 23, 1999

Municipal Investment Trust Fund,
Investment Grade Portfolio--11
(BBB Quality or Better)
Long-Intermediate Term Series
Defined Asset Funds

Merrill Lynch, Pierce, Fenner & Smith Incorporated
Salomon Smith Barney Inc.
PaineWebber Incorporated
Dean Witter Reynolds Inc.
c/o Merrill Lynch, Pierce, Fenner & Smith Incorporated
    Defined Asset Funds
    P.O. Box 9051
    Princeton, NJ 08543-9051

Dear Sirs:

     We have acted as special counsel for you, as sponsors (the Sponsors) of
Municipal Investment Trust Fund, Investment Grade Portfolio--11 (BBB Quality or
Better), Long-Intermediate Term Series, Defined Asset Funds (the 'Fund'), in
connection with the issuance of units of fractional undivided interest in the
Fund (the 'Units') in accordance with the Trust Indenture relating to the Fund
(the 'Indenture').

     We have examined and are familiar with originals or copies, certified or
otherwise identified to our satisfaction, of such documents and instruments as
we have deemed necessary or advisable for the purpose of this opinion.

     Based upon the foregoing, we are of the opinion that (i) the execution and
delivery of the Indenture and the issuance of the Units have been duly
authorized by the Sponsors and (ii) the Units, when duly issued and delivered by
the Sponsors and the Trustee in accordance with the Indenture, will be legally
issued, fully paid and non-assessable.

     We hereby consent to the use of this opinion as Exhibit 3.1 to the
Registration Statement relating to the Units filed under the Securities Act of
1933 and to the use of our name in such Registration Statement and in the
related prospectus under the heading 'How the Fund Works--Legal Opinion'.

                                          Very truly yours,

                                          DAVIS POLK & WARDWELL

<PAGE>
                                                                     EXHIBIT 4.1

KENNY INFORMATION SYSTEMS,
A Division of J. J. Kenny Co., Inc.
65 Broadway
New York, New York 10006
Telephone: 212-770-4422
Fax: 212-797-8681
Frank A. Ciccotto, Jr.
Vice President

                                                                  April 23, 1999

Merrill Lynch Pierce Fenner & Smith
Incorporated
Defined Asset Funds
P.O. Box 9051
Princeton, NJ 08543-9051
The Chase Manhattan Bank
Unit Investment Trust Division
4 New York Plaza--6th Floor
New York, NY 10004

Re: Municipal Investment Trust Fund,
    Investment Grade Portfolio--11
    (BBB Quality or Better)
    Long-Intermediate Term Series
    Defined Asset Funds

Gentlemen:

     We have examined the Registration Statement File No. 333-70583 for the
above-captioned fund. We hereby acknowledge that Kenny Information Systems, a
Division of J. J. Kenny Co., Inc. is currently acting as the evaluator for the
fund. We hereby consent to the use in the Registration Statement of the
reference to Kenny Information Systems, a Division of J. J. Kenny Co., Inc. as
evaluator.

     In addition, we hereby confirm that the ratings indicated in the
Registration Statement for the respective bonds comprising the trust portfolio
are the ratings indicated in our KENNYBASE database as of the date of the
Evaluation Report.

     You are hereby authorized to file a copy of this letter with the Securities
and Exchange Commission.

                                          Sincerely,

                                          FRANK A. CICCOTTO, JR.
                                          VICE PRESIDENT

<PAGE>
                                                                     Exhibit 5.1
                       CONSENT OF INDEPENDENT ACCOUNTANTS
The Sponsors and Trustee of Municipal Investment Trust Fund, Investment Grade
Portfolio--11 (BBB Quality or Better), Long-Intermediate Term Series, Defined
Asset Funds:

We consent to the use in this Registration Statement No. 333-70583 of our report
dated April 23, 1999 relating to the Statement of Condition of Municipal
Investment Trust Fund, Investment Grade Portfolio--11 (BBB Quality or Better),
Long-Intermediate Term Series, Defined Asset Funds, and to the reference to us
under the heading 'How the Fund Works--Auditors' in the Prospectus which is a
part of this Registration Statement.

DELOITTE & TOUCHE LLP
New York, N.Y.
April 23, 1999

<TABLE> <S> <C>

<ARTICLE> 6
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          MAR-31-1999
<PERIOD-END>                               APR-23-1999
<INVESTMENTS-AT-COST>                       10,579,454
<INVESTMENTS-AT-VALUE>                      10,579,454
<RECEIVABLES>                                   82,283
<ASSETS-OTHER>                                  20,650
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              10,682,387
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      102,933
<TOTAL-LIABILITIES>                            102,933
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    10,579,454
<SHARES-COMMON-STOCK>                       10,325,000
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                10,579,454
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                       0
<NET-INVESTMENT-INCOME>                              0
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                                0
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     10,325,000
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                               0
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                      0
<AVERAGE-NET-ASSETS>                                 0
<PER-SHARE-NAV-BEGIN>                                0
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                                  0
<EXPENSE-RATIO>                                      0
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>


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