PAINEWEBBER PATHFINDERS TRUST TREASURY & GROWTH STK SERS 20
485BPOS, 1999-05-03
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                                                    File No. 333-15799
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                         POST EFFECTIVE AMENDMENT NO. 2
                                       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:
      PAINEWEBBER PATHFINDERS TRUST, TREASURY AND GROWTH STOCK 
      SERIES 20
  B.  Name of Depositor:
      PAINEWEBBER INCORPORATED
  C.  Complete address of Depositor's principal executive office:
      PAINEWEBBER INCORPORATED
      1285 Avenue of the Americas
      New York, New York 10019
  D.  Name and complete address of agents for service:
      PAINEWEBBER INCORPORATED
      Attention: Mr. Robert E. Holley
      1200 Harbor Blvd.
      Weehawken, New Jersey 07087
  (x) Check if it is proposed that this filing should become effective        
      (immediately upon filing or on April 29, 1999) pursuant to paragraph    
      (b) of Rule 485.                                                        
  E.  Total and amount of securities being registered:                        
      An indefinite number of units of Beneficial Interest pursuant to Rule   
      24f-2 under the Investment Company Act of 1940.                         
  F.  Proposed maximum offering price to the public of the securities being   
      registered:                                                             
      Indefinite pursuant to Rule 24f-2
  G.  Amount of filing fee, computed at one-thirty-fourth of 1 percent of the
      proposed maximum aggregate offering price to the public:
      In accordance with Rule 24f-2, a fee in the amount of $0 was paid on 
      March 29, 1999 in connection with the filing of the Rule 24f-2 Notice 
      for the Trust's most recent fiscal year.
  H.  Approximate date of proposed sale to public:
      AS SOON AS PRACTICABLE AFTER THE EFFECTIVE DATE OF THE
      REGISTRATION STATEMENT.
    
                          PAINEWEBBER PATHFINDERS TRUST,
                       TREASURY AND GROWTH STOCK SERIES 20
Cross Reference Sheet
       Pursuant to Rule 404(c) of Regulation C under the Securities Act of
                                      1933
        (Form N-8B-2 Items required by Instruction 1 as to Prospectus on
                                    Form S-6)
  Form N-8B-2                                                          Form S-6
  Item Number                                             Heading in Prospectus
  I.       Organization and General Information
  1.    (a)Name of Trust                )  Front Cover
        (b)Title of securities issued   )
  2.    Name and address of             )  Back Cover
        Depositor
  3.    Name and address of             )  Back Cover
        Trustee
  4.    Name and address of             )  Back Cover
        Principal
        Underwriter                     )
  5.    Organization of Trust           )  The Trust
  6.    Execution and                   )  The Trust
        termination of
        Trust Agreement                 )  Termination of the Trust
  7.    Changes of name                 )  *
  8.    Fiscal Year                     )  *
  9.    Litigation                      )  *
  II.       General Description of the Trust and Securities of the Trust
  10.   General Information             )  The Trust;
        regarding
        Trust's Securities and          )  Rights of Unit
        Rights
        of Holders                      )  holders
  (a)   Type of Securities              )  The Trust
        (Registered or Bearer)          )
  (b)   Type of Securities              )  The Trust
        (Registered or Bearer)          )
  *     Not applicable, answer
        negative or not required.
 
  (c)   Rights of Holders as to         )  Rights of Unit
        Withdrawal or                   )  holders
        Redemption
                                        )  Redemption;
                                        )  Public Offering of Units-
                                        )  Secondary Market for Units
  (d)   Rights of Holders as to         )  Secondary Market for
        conversion, transfer, etc.      )  Units Exchange Option
  (e)   Rights of Trust issues          )
        periodic payment plan           )  *
        certificates                    )
  (f)   Voting rights as to             )  Rights of Unit
        Securi-
        ties, under the Indenture       )  holders
  (g)   Notice to Holders as to         )
        change in                       )
        (1)Assets of Trust              )  Amendment of the
                                           Indenture
        (2)Terms and Conditions         )  Administration of the
                                           Trust-Portfolio Supervision
           of Trust's Securities        )  Investments
        (3)Provisions of Trust          )  Amendment of the
                                           Indenture
        (4)Identity of Depositor and    )  Administration of the Trust
           Trustee
  (h)   Consent of Security             )
        Holders
        required to change              )
        (1)Composition of assets        )  Amendment of the
                                           Indenture
           of Trust                     )
        (2)Terms and conditions         )  Amendment of the
                                           Indenture
           of Trust's Securities        )
        (3)Provisions of Indenture      )  Amendment of the
                                           Indenture
        (4)Identity of Depositor        )  Administration of the Trust
           and Trustee                  )
  11.   Type of Securities              )  The Trust
        Comprising Units
  12.   Type of securities              )  *
        comprising
        periodic payment                )
        certificates
  13.   (a)Load, fees, expenses, etc.   )  Public Offering of
                                        )  Units; Expenses of the
                                        )  Trust
  *     Not applicable, answer
        negative or not required.
 
        (b)Certain information          )  *
           regarding periodic payment   )  *
           certificates                 )
        (c)Certain percentages          )  *
        (d)Certain other fees, etc.     )  Expenses of the Trust
           payable by holders           )  Rights of Unitholders
        (e)Certain profits receivable   )  Public Offering of
           by depositor, principal      )  Units
           underwriters, trustee or     )  Public Offering of Units
           affiliated persons           )  Market for Units
        (f)Ratio of annual charges to   )  *
           income                       )
  14.   Issuance of Trust's             )  The Trust
        securities
                                        )  Public Offering of Units
  15.   Receipt and handling of         )  *
        payments from                   )
        purchasers
  16.   Acquisition and                 )  The Trust; Administration
        disposition of
        underlying securities           )  of the Trust; Termination
                                        )  of Trust
  17.   Withdrawal or                   )  Redemption
        redemption
                                        )  Public offering of Units
                                        )  -Secondary Market for
                                        )  -Exchange Option
                                        )  -Conversion Option
  18.   (a)Receipt and disposition of   )  Distributions of
           income                       )  Unitholders
        (b)Reinvestment of              )  *
           distributions
        (c)Reserves or special fund     )  Distributions to
                                        )  Unitholders; Expenses of
                                           Trust
        (d)Schedule of distribution     )  *
  19.   Records, accounts and           )  Distributions
        report
                                        )  Administration
                                        )  of the Trust
  20.   Certain miscellaneous           )  Administration of the Trust
        pro-
        visions of Trust                )
        agreement
  21.   Loans to security               )  *
        holders
  22.   Limitations on liability        )  Sponsor, Trustee
  23.   Bonding arrangements            )  Included in Form N-8B-2
  24.   Other material                  )  *
        provisions of
        trust agreement                 )
  *     Not applicable, answer
        negative or not required.
 
  III.        Organization
  Personnel and        Affiliated
  Persons of Depositor
  25.   Organization of                 )  Sponsor
        Depositor
  26.   Fees received by                )  Public Offering of
        Depositor
                                        )  Units Expenses of the Trust
  27.   Business of Depositor           )  Sponsor
  28.   Certain information as to       )  Sponsor
        officials and affiliated        )
        persons of Depositor            )
  29.   Voting securities of            )  *
        Depositor
  30.   Persons controlling             )  Sponsor
        Depositor
  31.   Payments by Depositor           )  *
        for
        certain other services          )
        rendered to Trust               )
  32.   Payments by Depositor           )  *
        for
        certain other services          )
        rendered to Trust               )
  33.   Remuneration of                 )  *
        employees of
        Depositor for certain           )
        services
        rendered to Trust               )
  34.   Remuneration of other           )  *
        persons
        for certain services            )
        rendered
        to Trust                        )
  IV.        Distribution and Redemption of Securities
  35.   Distribution of Trust's         )  Public Offering of Units
        securities by states            )
  36.   Suspension of sales of          )  *
        Trust's
        securities                      )
  37.   Revocation of authority         )  *
        to
        distribute                      )
  38.   (a)Method of distribution       )  Public Offering of Units
        (b)Underwriting agreements      )
        (c)Selling agreements           )  Sponsor
  *     Not applicable, answer
        negative or not required.
 
  39.   (a)Organization of principal    )  Sponsor
           underwriter                  )
        (b)N.A.S.D. membership of       )  Sponsor
           principal underwriter        )
  40.   Certain fees received by        )  Public Offering Price of
        principal underwriter           )  Units
  41.   (a)Business of principal        )  Sponsor
           underwriter                  )
        (b)Branch officers of           )  *
           principal underwriter        )
        (c)Salesman of principal        )  *
           underwriter                  )
  42.   Ownership of Trust's            )  *
        securities
        by certain persons              )
  43.   Certain brokerage               )  *
        commissions
        received by principal           )
        underwriter                     )
  44.   (a)Method of valuation          )  Public Offering Price of
                                        )  Units
        (b)Schedule as to offering      )  *
           price                        )
        (c)Variation in Offering        )  Public Offering Price of
           price to certain persons     )  Units
  45.   Suspension of                   )  *
        redemption rights
  46.   (a)Redemption valuation         )  Public Offering of Units
                                        )  -Secondary Market for Units
                                        )  -Valuation
        (b)Schedule as to redemption    )
           price                        )
  V.        Information concerning the Trustee or Custodian
  47.   Maintenance of position         )  Public Offering of Units
        in
        underlying securities           )  Redemption
                                        )  Trustee
                                        )  Evaluation of the Trust
  48.   Organization and                )
        regulation of
        Trustee                         )  Trustee
  49.   Fees and expenses of            )  Expenses of the Trust
        Trustee
  50.   Trustee's lien                  )  Expenses of the Trust
  *     Not applicable, answer
        negative or not required.
 
  VI.        Information
  concerning Insurance of
  Holders of Securities
  51.   (a)Name and address of          )  *
           Insurance Company            )
        (b)Type of policies             )  *
        (c)Type of risks insured and    )  *
           excluded                     )
        (d)Coverage of policies         )  *
        (e)Beneficiaries of policies    )  *
        (f)Terms and manner of          )  *
           cancellation                 )
        (g)Method of determining        )  *
           premiums                     )
        (h)Amount of aggregate          )  *
           premiums paid                )
        (i)Who receives any part of     )  *
           premiums                     )
        (j)Other material provisions    )  *
           of the Trust relating to     )
           insurance                    )
  VII.       Policy of Registrant
  52.   (a)Method of selecting and      )  The Trust;
           eliminating securities       )  Administration of the Trust
           from the Trust               )
        (b)Elimination of securities    )  *
           from the Trust               )
        (c)Policy of Trust regarding    )  Portfolio Supervision
                                        )  Administration of Trust
           substitution and
           elimination of securities    )
        (d)Description of any funda-    )  Administration of
           mental policy of the Trust   )  Trust
                                        )  Portfolio Supervision
  53.   (a)Taxable status of the        )  Tax status of the Trust
           Trust                        )
        (b)Qualification of the Trust   )  Tax status of the Trust
           as a mutual investment       )
           company                      )
  *     Not applicable, answer
        negative or not required.
 
  VIII.       Financial and
  Statistical Information
  54.   Information regarding           )  *
        the
        Trust's past ten fiscal         )
        years
  55.   Certain information             )  *
        regarding
        periodic payment plan           )
        certificates                    )
  56.   Certain information             )  *
        regarding
        periodic payment plan           )
        certificates                    )
  57.   Certain information             )  *
        regarding
        periodic payment plan           )
        certificates                    )
  58.   Certain information             )  *
        regarding
        periodic payment plan           )
        certi-
        ficates                         )
  59.   Financial statements            )  Statement of Financial
        (Instruction 1(c) to            )  Condition
        Form S-6)
  *     Not applicable, answer
        negative or not required.
   
PAINEWEBBER PATHFINDERS TRUST
TREASURY AND GROWTH STOCK SERIES TWENTY
(A Unit Investment Trust)
 21,400,000 Units

Portfolio of "Zero-Coupon" U.S. Treasury 
    Obligations and Common Stocks
Designed for Preservation of Capital and 
    Potential Capital Appreciation

 This Prospectus consists of two parts: Part A and 
Part B. Parts A and B should both be attached for 
this Prospectus to be complete.

The Securities and Exchange Commission has not 
approved or disapproved these Securities or 
passed upon the adequacy of this prospectus.  Any 
representation to the contrary is a criminal 
offense.

SPONSOR:
PAINEWEBBER INCORPORATED
PROSPECTUS PART A DATED APRIL 29, 1999

No person is authorized to give any information 
or make any representations about this Trust not 
contained in this Prospectus, and you should not 
rely on any other information. Read and keep both 
parts of this prospectus for future reference.

Table of Contents
Part A                                                Page
Brief Description of the Trust's Investment Portfolio A - 3
Is this Trust Appropriate for You?                    A - 4
Summary of Risks                                      A - 4
Essential Information Regarding the Trust             A - 7
Report of Independent Auditors                        A - 8
Statement of Financial Condition                      A - 9
Statement of Operations                               A - 10
Statement of Changes in Net Assets                    A - 11
Notes to Financial Statements                         A - 12
Schedule of Investments                               A - 13
Part B
The Composition of the Trust's Portfolio              B - 1
About the Trust                                       B - 1
Risk Factors and Special Considerations               B - 2
Federal Income Taxes                                  B - 4
Public Offering of Units                              B - 6
  Public Offering Price                               B - 6
  Sales Charge and Volume Discount                    B - 6
  Employee Discount                                   B - 7
  Exchange Option                                     B - 7
  Conversion Option                                   B - 9
  Distribution of Units                               B - 9
  Secondary Market for Units                          B - 9
  Sponsor's Profits                                   B - 9
Redemption                                            B - 10
Valuation                                             B - 11
Comparison of Public Offering Price and
Redemption Value                                      B - 11
Expenses of the Trust                                 B - 12
Rights of Unitholders                                 B - 13
Distributions                                         B - 13
Administration of the Trust                           B - 13
  Accounts                                            B - 13
  Reports and Records                                 B - 13
  Portfolio Supervision                               B - 14
  Reinvestment                                        B - 14
Amendment of the Indenture                            B - 15
Termination of the Trust                              B - 15
Sponsor                                               B - 15
Trustee                                               B - 16
Independent Auditors                                  B - 16
Legal Opinions                                        B - 16

PAINEWEBBER PATHFINDERS TRUST, TREASURY AND 
GROWTH STOCK
SERIES TWENTY  -  PART A

Brief Description of the Trust's Investment 
Portfolio

1. The Trust's Objective.

The Trust seeks to provide preservation of 
capital and potential capital appreciation 
through an investment in a portfolio of stripped 
"zero-coupon" United States Treasury Obligations 
maturing on August 15, 2007 and common stocks. 
Because the maturity value of the Treasury 
Obligations is backed by the full faith and 
credit of the United States, the Sponsor believes 
that the Trust provides an attractive combination 
of safety and appreciation for purchasers who 
hold Units until August 30, 2007, the Trust's 
"Mandatory Termination Date".

As of the date of this Prospectus Part A, 49% of 
the Trust's Portfolio was invested in interest-
only portions of United States Treasury 
Obligations and the remaining 51% was invested in 
common stocks as described briefly below.

The stripped "zero-coupon" U.S. Treasury 
Obligations make no payment of current interest, 
but rather make a single payment upon their 
stated maturity. PaineWebber chose the stocks in 
the Trust's Portfolio for their capital 
appreciation potential, not for their income 
potential. Many of the stocks currently pay 
little or no dividend income.

The Trust has been formulated so that the portion 
of the Trust invested in stripped Treasury 
Obligations is designed to provide an approximate 
return of principal invested on the Mandatory 
Termination Date for purchasers on the Initial 
Date of Deposit.  (See "Essential Information- 
Distributions".)  Therefore, even if the Stocks 
are valueless upon termination of the Trust, and 
if the Treasury Obligations are held until their 
maturity in proportion to the Units outstanding, 
purchasers will receive, at the termination of 
the Trust, $1,000 per 1,000 Units purchased.  
This feature of the Trust provides that 
Unitholders who purchased their Units at or below 
$1,000 per 1,000 Units and who hold their units 
to the Mandatory Termination Date will receive 
the same amount as they originally invested, 
although they would have foregone earning any 
interest on the amounts involved and will not 
protect their principal on a present value basis, 
assuming the Stocks are valueless.

2. Brief Description of the Trust's Portfolio.

The Trust is a unit investment trust which means 
that, unlike a mutual fund, the Trust's Portfolio 
is not managed and the Trust Portfolio's 
investments are not sold because of market 
changes.

Unless terminated sooner, the Trust is scheduled 
to terminate on or about August 30, 2007 
regardless of market conditions at the time. The 
Trust plans to hold until its termination the 
U.S. Treasury Obligations maturing August 15, 
2007 and a diversified group of stocks, all as 
shown on the "Schedule of Investments" in this 
Prospectus Part A.

The main objective of PaineWebber in constructing 
the portfolio of stocks to be included in the 
Trust was to select a group of stocks which, in 
PaineWebber's view, would be capable of, over the 
long term, closely tracking the performance of 
the market as measured by the S&P 500. The S&P 
500 is an unmanaged index of 500 stocks 
calculated under the auspices of Standard & 
Poor's, which, in PaineWebber's view, is a 
broadly diversified, representative segment of 
the market of all publicly traded stocks in the 
United States.

On December 31, 1998, the aggregate market value 
of the Trust Portfolio was $29,134,641.

When the Trust's Portfolio was constructed in 
1997, a computer program was generated against 
the 500 S&P stocks to identify a combination of 
40 S&P 500 stocks (excluding General Electric and 
those stocks rated "Unattractive" or "Sell" by 
PaineWebber Equity Research) which, when equally 
weighted, have the highest correlation with the 
S&P 500 Index with the smallest tracking error. 

As of December 31, 1998, the Trust Portfolio 
holds 43 stocks.

The common stocks in the Trust's Portfolio have 
been issued by companies who receive income and 
derive revenues from multiple industry sources, 
but whose primary industry is listed in the table 
below and in the "Schedule of Investments" in 
this Prospectus Part A.
                                  Approximate
                                  Percent
                                  of Aggregate
                                  Market Value
Primary Industry Source           of the Trust
Aerospace/Defense                 1.38%
Automobile                        2.46%
Beverages                         1.94%
Chemicals                          .84%
Computer Peripheral Equipment     2.56%
Computer Processing & 
  Data Preparation                 .69%
Computer Software                 2.40%
Electronics/Semi-Conductor        3.32%
Entertainment                     1.04%
Financial Institutions/Banks      6.38%
Household Products                1.32%
Insurance                         1.85%
Manufacturing                      .72%
Metals                             .66%
Office/Business Equipment         2.00%
Oil/Gas                           5.09%
Pharmaceuticals                   5.94%
Publishing/Printing               1.39%
Restaurants                       1.50%
Retail-Variety Stores             2.93%
Telecommunications                4.07%
Transportation                     .95%

Is this Trust Appropriate for You?

Yes, if you are a long-term investor 
seeking capital protection combined with 
potential capital appreciation over the life of 
the Trust. You will benefit from a professionally 
selected portfolio whose risk is reduced by 
investing in stocks of several different issuers.

No, if you want a speculative investment 
that changes to take advantage of market 
movements, if you are unable or unwilling to 
assume the risks involved generally with equity 
investment or if you need current income.

Summary of Risks

You can lose money by investing in the 
Trust.  This can happen for various reasons.  A 
further discussion of the risks summarized below 
can be found in Part B of this Prospectus.

1. Risks of Investing in the Trust

Certain risks are involved with an 
investment in a unit trust which holds stripped 
"zero-coupon" U.S. Treasury Obligations and 
common stocks.  For example:

The Trust, unlike a mutual fund, is not 
"managed", so neither the U.S. Treasury 
Obligations nor the stocks will be sold by the 
Trust to take advantage of market fluctuations.

The Trust Portfolio may not remain constant 
during the life of the Trust.  The Trustee may be 
required to sell stocks to pay Trust expenses, to 
tender stocks under certain circumstances or to 
sell stocks in the event certain negative events 
occur.

The sale of stocks from the Trust in the period 
prior to termination and upon termination may 
result in a lower amount than might otherwise be 
realized if such sale were not required at such 
time due to impending or actual termination of 
the Trust.  For this reason, among others, the 
amount you receive upon termination may be less 
than the amount you paid.

If many investors sell their Units, the Trust 
will have to sell Portfolio Securities.  This 
could reduce the diversification of your 
investment and increase your share of Trust 
expenses.

The price of your Units depends upon the full 
range of economic and market influences including 
the prices of bonds and equity securities, 
current interest rates, the condition of the bond 
and stock markets and other economic influences 
that affect the global or United States economy.

Assuming no changes occur in the prices of the 
U.S. Treasury Obligations and the stocks held by 
the Trust, the price you paid for your Units will 
generally be less than the price you paid because 
your purchase price included a sales charge.

The stocks in the Trust's Portfolio will 
generally trade on a domestic stock exchange or 
in the over-the-counter market.  We cannot assure 
you that a liquid trading market will exist.  The 
value of the Trust's Portfolio, and of your 
investment, may be reduced if trading in one or 
more stocks is limited or absent.

Additional stocks and U.S. Treasury Obligations 
may be acquired by the Trust when additional 
Units are to be offered to the public.  Costs 
incurred in acquiring such additional stocks and 
Treasury Obligations will be borne by the Trust.  
Unitholders will experience a dilution of their 
investment as a result of such brokerage fees and 
other expenses paid by the Trust during the 
additional deposits of securities purchased by 
the Trustee with cash or cash equivalents.

Investing always involves risk.  The risks 
described below are the most significant risks 
associated with investing in the U.S. Treasury 
Obligations and stocks held by the Trust.

2. Risks of Investing in Stripped "Zero-Coupon" 
U.S. Treasury Obligations

The stripped Treasury Securities in the 
Trust were purchased at a deep discount and do 
not make any periodic payments of interest. 
Instead, the entire payment of proceeds will be 
made upon maturity of such Treasury Obligations.  
Owners of deep discount bonds which make no 
current interest payments earn a fixed yield not 
only on the original investment but also on all 
earned discount during the life such obligation.  
This implicit reinvestment of earnings at the 
same, fixed rate eliminates the owner's ability 
to reinvest at higher rates in the future.  For 
this reason, sale of Units prior to the 
termination date of the Trust will involve 
substantially greater price fluctuations during 
periods of changing market interest rates than 
would be experienced in connection with sale of 
Units of a Trust which held Treasury Obligations 
which made scheduled interest payments on a 
current basis.

3. Risks of Investing in Stocks

Holders of common stocks such as those held by 
the Trust have rights that are generally inferior 
to the holders of debt obligations or preferred 
stocks.

Common stocks are not obligations of the issuer. 
Therefore, they do not provide any assurance of 
income or provide the degree of protection of 
debt securities.

The stocks held by the Trust can be expected to 
fluctuate in value depending on a wide variety of 
factors, such as economic and market influences 
affecting corporate profitability, financial 
condition of issuers, changes in worldwide or 
national economic conditions, the prices of 
equity securities in general and the Trust's 
stocks in particular.

Certain of the stocks in the Trust may be 
American Depositary Receipts or "ADRs" which are 
subject to additional risks.  (See "Schedule of 
Investments" herein.)  ADRs are subject to 
certain investment risks that are different from 
those experienced by Stocks issued by domestic 
issuers.  These investment risks include 
potential future political and economic 
developments and the potential establishment of 
exchange controls, new or higher levels of 
taxation, or other governmental actions which 
might adversely affect the payment or receipt of 
payment of dividends on the common stock of 
foreign issuers underlying such ADRs. ADRs may 
also be subject to current foreign taxes, which 
could reduce the yield on such securities.

The securities underlying the ADRs held in the 
Trust are generally denominated, and pay 
dividends, in foreign currency and are therefore 
subject to currency exchange rate risk.  Currency 
exchange rate risk occurs because the U.S. dollar 
value of the shares underlying the ADRs and of 
their dividends will vary with the fluctuations 
in the U.S. dollar foreign exchange rates for the 
relevant currency in which the shares underlying 
the ADRs are denominated.  Exchange rate 
fluctuations are dependent on a number of 
economic factors including the world economy and 
the economic conditions within the relevant 
country, supply and demand of the relevant 
currency, interest rate differentials between 
currencies, the balance of imports and exports of 
goods and services, monetary and fiscal policies 
of the relevant country, perceived political 
stability and investor psychology, especially 
that of institutional investors predicting the 
future relative strength or weakness of a 
particular currency.

Year 2000 Problem Risk

 Many computer systems were designed in such a 
way that they may be unable to distinguish 
between the year 2000 and the year 1900 and 
therefore may not properly process and calculate 
date-related information and data (commonly know 
as the "Year 2000 Problem").  As with all 
investment and financial companies, the Year 2000 
Problem may have an adverse impact upon the 
Trust.  The Sponsor and the Trustee are taking 
steps to address the year 2000 Problem with 
respect to the computer systems they use and to 
obtain reasonable assurances that similar steps 
are being taken by the Trust's other service 
providers.  At this time, however, there can be 
no assurance that these steps will be sufficient 
to avoid any adverse impact to the Trust. The 
year 2000 Problem is expected to have an impact 
on all corporations, including those whose stocks 
are contained in the Trust's Portfolio. The 
Sponsor cannot predict what impact, if any, the 
year 2000 Problem will have on the stocks in the 
Trust.
<TABLE>
ESSENTIAL INFORMATION REGARDING THE TRUST
<CAPTION>
As of December 31, 1998
Sponsor:   PaineWebber Incorporated
Co-Trustees:   Investors Bank & Trust Co. and
   The First National Bank of Chicago
Initial Date of Deposit: January 30, 1997
<S>                                                                   <C>
Aggregate Market Value of Securities in Trust:                        $29,134,641                               
Number of Units:                                                      21,400,000                                
Minimum Purchase:                                                     $250                                      
Fractional Undivided Interest in the Trust Represented by                                                       
Each Unit:                                                            1/21,400,000th                            
Calculation of Public Offering Price Per Unit:                                                                  
Value of Net Assets in Trust                                          $29,136,963                               
Divided by 21,400,000 Units                                           $1.3615                                   
Plus Sales Charge of 4.75% of Public Offering Price                   $.0679                                    
Public Offering Price per Unit                                        $1.4294                                   
Redemption Value per Unit                                             $1.3615                                   
Excess of Public Offering Price over Redemption Value per Unit:       $.0679                                    
Sponsor's Repurchase Price per Unit                                   $1.3615                                   
Excess of Public Offering over Sponsor's Repurchase Price per Unit:   $.0679                                    
Evaluation Time:                                                      4 P.M. New York Time                      
Distribution Dates*:                                                  Quarterly on January 20, April 20,        
                                                                      July 20 and October 20.                   
Record Date:                                                          March 31, June 30, September 30           
                                                                      and December 31.                          
Mandatory Termination Date:                                           August 30, 2007 (15 days after            
                                                                      maturity of the TreasuryObligations).
Discretionary Liquidation Amount:                                     20% of the value of the Securities        
                                                                      upon completion of the deposit of         
                                                                      the Securities                            
Estimated Expenses of the Trust * *:                                  $.00270 per Unit                          

   * See " Distributions " 
* * See " Expenses of Trust ". Estimated 
dividends from the Growth Stocks, based upon last 
dividends 
 actually paid, are expected by the Sponsor to 
be sufficient to pay Estimated Expenses of the 
Trust.
</TABLE>
<TABLE>
            REPORT OF INDEPENDENT AUDITORS
<C>                                   <S>
THE UNITHOLDERS, SPONSOR AND CO-TRUSTEES
THE PAINEWEBBER PATHFINDERS TRUST, TREASURY AND 
GROWTH STOCK SERIES TWENTY: 
 We have audited the accompanying statement of 
financial condition, including the schedule of 
investments, of The PaineWebber Pathfinders 
Trust, Treasury and Growth Stock Series Twenty as 
of December 31, 1998 and the related statements 
of operations and changes in net assets for the 
year ended December 31, 1998 and for the period 
from January 30, 1997 (initial date of deposit) 
to December 31, 1997. These financial statements 
are the responsibility of the Co-Trustees. Our 
responsibility is to express an opinion on these 
financial statements based on our audits. 

 We conducted our audits 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 statements are free of 
material misstatement. An audit includes 
examining, on a test basis, evidence supporting 
the amounts and disclosures in the financial 
statements. Our procedures included confirmation 
of the securities owned as of December 31, 1998, 
as shown in the statement of financial condition 
and schedule of investments, by correspondence 
with the Co-Trustees. An audit also includes 
assessing the accounting principles used and 
significant estimates made by the Co-Trustees, as 
well as evaluating the overall financial 
statement presentation. We believe that our 
audits provide a reasonable basis for our 
opinion. 

 In our opinion, the financial statements 
referred to above present fairly, in all material 
respects, the financial position of The 
PaineWebber Pathfinders Trust, Treasury and 
Growth Stock Series Twenty at December 31, 1998 
and the results of its operations and changes in 
its net assets for the year ended December 31, 
1998 and for the period from January 30, 1997 to 
December 31, 1997, in conformity with generally 
accepted accounting principles. 
                         ERNST & YOUNG LLP
New York, New York 
April 15, 1999
</TABLE>
<TABLE>
           THE PAINEWEBBER PATHFINDERS TRUST
        TREASURY AND GROWTH STOCK SERIES TWENTY 
           STATEMENT OF FINANCIAL CONDITION
               December 31, 1998
<CAPTION>
                     ASSETS
<S>                                                           <C>                  <C>
Treasury Obligation - at market value (Cost $11,400,384)                  
(note A and note 1 to schedule of investments)                 $14,150,515
Common Stock - at market value (Cost $9,883,009)                          
(note 1 to schedule of investments)                            14,984,126 
Accrued dividends receivable                                   12,435     
Cash                                                           17,063     
Prepaid Organizational Expenses                                58,705     
Total Assets                                                   $29,222,844
                 LIABILITIES AND NET ASSETS
Distribution payable (note E)                                                     $43,014    
Accrued expenses payable                                                          42,867     
Total Liabilities                                                                 $85,881    
Net Assets (21,400,000 units of fractional undivided interest outstanding):                  
Cost to investors (note B)                                                        $22,344,770
Less gross underwriting commissions (note C)                                      (1,061,377)
                                                                                  21,283,393 
Net unrealized market appreciation (note D)                                       7,851,248  
Net amount applicable to unitholders                                              29,134,641 
Undistributed investment income-net                                               1,902      
Undistributed proceeds from securities sold                                       420        
Net Assets                                                                        29,136,963 
Total Liabilities and Net Assets                                                  $29,222,844
Net Asset Value per unit                                                          $1.3615    
  See accompanying notes to financial statements.
</TABLE>
<TABLE>
           THE PAINEWEBBER PATHFINDERS TRUST
       TREASURY AND GROWTH STOCK SERIES TWENTY 
              STATEMENT OF OPERATIONS
<CAPTION>
                                                                                For the Period    
                                                                                from January 30,  
                                                                                1997 (initial date
                                                             Year Ended         of deposit) to    
                                                             December 31,       December 31,      
                                                             1998               1997              
<S>                                                          <C>                <C>
Operations:                                                                                       
Investment income:                                                                                
Accretion on Treasury Obligation                             $956,133           $1,000,149        
Dividend Income                                              260,789            278,344           
    Total investment income                                  1,216,922          1,278,493         
Less expenses:                                                                                    
Trustee's fees, evaluator's expense and other expenses       84,600             120,820           
    Total expenses                                           84,600             120,820           
Investment income-net                                        1,132,322          1,157,673         
Realized and unrealized gain on investments-net:                                                  
Net realized gain on securities transactions                 1,839,822          393,348           
Net change in unrealized market appreciation                 3,459,250          4,391,998         
Net gain on investments                                      5,299,072          4,785,346         
Net increase in net assets resulting from operations         $6,431,394         $5,943,019        
 See accompanying notes to financial statements.
</TABLE>
<TABLE>
           THE PAINEWEBBER PATHFINDERS TRUST
TREASURY AND GROWTH STOCK SERIES TWENTY 
STATEMENT OF CHANGES IN NET ASSETS
<CAPTION>
                                                                              For the Period    
                                                                              from January 30,  
                                                                              1997 (initial date
                                                           Year Ended         of deposit) to    
                                                           December 31,       December 31,      
                                                           1998               1997              
<S>                                                        <C>                <C>
Operations:                                                                                     
Investment income-net                                      $1,132,322         $1,157,673        
Net realized gain on securities transactions               1,839,822          393,348           
Net change in unrealized market appreciation               3,459,250          4,391,998         
Net increase in net assets resulting from operations       6,431,394          5,943,019         
Less: Distributions to Unitholders (Note E)                                                     
Investment income-net                                      166,859            166,071           
    Total Distributions                                    166,859            166,071           
Less: Units Redeemed by Unitholders (Note F)                                                    
Value of units at date of redemption                       12,690,506         5,980,102         
Accrued dividends at date of redemption                    11,210             6,190             
Accreted discount at date of redemption                    474,294            99,838            
    Total Redemptions                                      13,176,010         6,086,130         
    Decrease in net assets                                 (6,911,475)        (309,182)         
Net Assets:                                                                                     
Beginning of Period                                        36,048,438         ---               
Supplemental Deposits (Note F)                             ---                36,357,620        
End of Period                                              $29,136,963        $36,048,438       
  See accompanying notes to financial statements.
</TABLE>
<TABLE>
           THE PAINEWEBBER PATHFINDERS TRUST
       TREASURY AND GROWTH STOCK SERIES TWENTY 
            NOTES TO FINANCIAL STATEMENTS
               December 31, 1998
 (A) The financial statements of the Trust are 
prepared on the accrual basis of accounting. 
Security transactions are accounted for on the 
date the securities are purchased or sold. The 
original issue discount on the Treasury 
Obligation is accreted on a level yield basis. 
The amount of discount included in the cost of 
the Treasury Obligation held as of December 31, 
1998 is $1,375,420.
 (B) Cost to investors represents the initial 
public offering price as of the initial date of 
deposit, and the value of units through 
supplemental deposits computed on the basis set 
forth under "Public Offering Price of Units" in 
Part B, adjusted for accretion on United States 
Treasury Obligations and for securities sold 
since the date of deposit. 
 (C) Sales charge of the Public Offering Price 
per Unit is computed on the basis set forth under 
"Public Offering of Units - Sales Charge and 
Volume Discount" in Part B. 
 (D) At December 31, 1998, the gross unrealized 
market appreciation was $8,006,449 and the gross 
unrealized market depreciation was ($155,201). 
The net unrealized market appreciation was 
$7,851,248. 
 (E) Regular distributions of net income, 
excluding accretion income and principal receipts 
not used for redemption of units are made 
quarterly. Special distributions may be made when 
the Sponsor and Co-Trustee deem necessary. Income 
with respect to the accretion of original issue 
discount is not distributed although the 
unitholder is subject to tax, where applicable, 
as if the distribution had occurred. Accretion 
income earned by the Trust increases a 
unitholder's cost basis in the underlying 
security.
 (F) The following units were redeemed with 
proceeds of securities sold as follows:
<CAPTION>
                                                                            For the Period    
                                                                            From January 30,  
                                                                            1997 (initial date
                                                         Year Ended         of deposit) to    
                                                         December 31,       December 31,      
                                                         1998               1997              
<S>                                                      <C>                <C>
Number of units redeemed                                 10,800,000         5,700,000         
Redemption amount                                        $13,176,010        $6,086,130        
The following units were sold through supplemental                                            
deposits:                                                                                     
Number of units sold                                     ---                36,900,000        
Value of amount, net of sales charge                     ---                $35,405,120       
</TABLE>
<TABLE>
THE PAINEWEBBER PATHFINDERS TRUST
TREASURY AND GROWTH STOCK SERIES TWENTY 
SCHEDULE OF INVESTMENTS
<CAPTION>
As of December 31, 1998
TREASURY OBLIGATIONS (48.57%)
Name of Security                               Coupon   Maturity Value   Maturity Date     Market Value(1)
<C>                                            <C>   <C> <C>             <C><C>            <C>
U.S. Treasury Interest Payments (2) (48.57%)   0%       $21,400,000      August 15, 2007   $14,150,515 
COMMON STOCKS (51.43%)
Name of Issuer                                       Number of Shares       
Market Value(1)
Aerospace/Defense: (1.38%)                                                                 
Raytheon Company (3)                                 253                    $13,077        
United Technologies Corporation                      3,570                  388,238        
Automobile: (2.46%)                                                                        
Ford Motor Company                                   7,345                  431,060        
General Motors Corporation                           3,989                  285,463        
Beverages: (1.94%)                                                                         
The Coca-Cola Company                                4,200                  280,875        
PepsiCo, Inc.                                        6,928                  283,615        
Chemicals: (.84%)                                                                         
DuPont (E.I.) De Nemours & Company                   4,618                  245,043        
Computer Peripheral Equipment: (2.56%)                                                     
Cisco Systems, Inc.*                                 8,030                  745,284        
Computer Processing & Data Preparation: (.69%)                                             
First Data Corporation                               6,299                  199,600        
Computer Software: (2.40%)                                                                 
Microsoft Corporation*                               5,041                  699,124        
Electronics/Semi-Conductor: (3.32%)                                                        
Emerson Electric Company                             5,041                  303,720        
Hewlett-Packard Company                              4,620                  315,604        
Intel Corp                                           2,940                  348,574        
Entertainment: (1.04%)                                                                     
The Walt Disney Company                              10,079                 302,370        
Financial Institutions/Banks: (6.38%)                                                      
Associates First Capital Corporation (5)             3,852                  163,228        
BankAmerica Corporation (6)                          4,618                  277,657        
Chase Manhattan Corporation                          5,459                  371,553        
Citigroup Inc. (7)                                   5,251                  259,924        
Fannie Mae                                           6,089                  450,586        
Wells Fargo & Company                                8,412                  335,954        
Household Products: (1.32%)                                                               
Procter & Gamble Company                             4,200                  383,513        
Insurance: (1.85%)                                                                        
Aetna Inc.                                           2,943                  231,393        
Allstate Corporation                                 7,981                  308,266        
Manufacturing: (.72%)                                                                      
Minnesota Mining & Manufacturing Co.                 2,943                  209,321        
Metals: (.66%)                                                                             
Alcan Aluminum Ltd.                                  7,139                  193,199        
Office/Business Equipment: (2.00%)                                                         
Pitney Bowes, Inc.                                   8,819                  582,605        
Oil/Gas: (5.09%)                                                                           
Amoco Corporation                                    5,461                  329,708        
Chevron Corporation                                  3,779                  313,421        
Exxon Corporation                                    4,617                  337,618        
Royal Dutch Petroleum Company ~                      5,877                  281,361        
Texaco Inc.                                          4,201                  222,128        
(Continued)
</TABLE>
<TABLE>
THE PAINEWEBBER PATHFINDERS TRUST
TREASURY AND GROWTH STOCK SERIES TWENTY 
SCHEDULE OF INVESTMENTS
<CAPTION>
As of December 31, 1998
COMMON STOCKS (51.43%)                                                     
Name of Issuer                       Number of Shares       Market Value(1)
<C>                                  <C>                    <C>
Pharmaceuticals: (5.94%)                                                   
Abbott Laboratories                  9,239                  $452,711       
Bristol-Myers Squibb Company         3,781                  505,945        
Johnson & Johnson                    4,408                  369,721        
Merck & Co., Inc.                    2,731                  403,335        
Publishing/Printing: (1.39%)                                               
Gannett Company, Inc.                6,298                  406,221        
Restaurants: (1.50%)                                                       
McDonald's Corporation               5,251                  402,358        
Tricon Global Restaurants*(4)        691                    34,636         
Retail-Variety Stores: (2.93%)                                             
Wal-Mart Stores, Inc.                10,498                 854,931        
Telecommunications: (4.07%)                                                
AT & T Corporation                   6,299                  474,000        
Bell Atlantic Corporation            6,717                  356,001        
GTE Corporation                      5,457                  354,705        
Transportation: (.95%)                                                     
Burlington Northern Santa Fe         8,192                  276,480        
TOTAL COMMON STOCKS                                         $14,984,126    
TOTAL INVESTMENTS                                           $29,134,641    
(1) Valuation of Securities was made by the 
Co-Trustees as described in "Valuation". 
(2) This security does not pay current 
interest.  On the maturity date thereof, the 
entire maturity value becomes
 due and payable. Generally, a fixed yield is 
earned on such security which takes into account 
the semi-annual
 compounding of accrued interest.  (See "The 
Trust" and "Federal Income Taxes" herein).
(3) Hughes Aircraft, a General Motors spin-
off, now merged into the Raytheon Company.
(4) Spin-off of PepsiCo's Restaurant Division.
(5) Spin-off of Ford Motor Company.
(6) Formerly NationsBank Corporation.
(7) Formerly Citicorp.
  * Non-income producing. 
 ~ American Depositary Receipts.
</TABLE>

            PAINEWEBBER PATHFINDERS TRUST
TREASURY AND GROWTH STOCK SERIES 20
               PROSPECTUS PART B 
PART B OF THIS PROSPECTUS MAY NOT BE 
DISTRIBUTED
            UNLESS ACCOMPANIED BY PART A.

Part B contains a description of the important 
features of the PaineWebber Pathfinders Trust 
Treasury and Growth Stock Series 20 and also 
includes a more detailed discussion of the 
investment risks that a Unitholder might face 
while holding Trust Units.

           THE COMPOSITION OF THE PORTFOLIO

 PaineWebber understands the importance of long-
term financial goals such as planning for 
retirement, funding a child's education, or 
trying to build wealth toward some other 
objective. 

 In PaineWebber's view, one of the most important 
investment decisions an investor faces may be 
determining how to best allocate his investments 
to capture growth opportunities without exposing 
his portfolio to undue risk. For long-term 
capital growth, many investment experts recommend 
stocks. As with all investments, the higher 
return potential of equities is typically 
associated with higher risk. With this in mind, 
PaineWebber designed a portfolio to meet the 
needs of investors interested in building wealth 
prudently over a long-term time horizon by 
pairing the security of U.S. Treasury bonds with 
the growth potential of Stocks. The Trust is a 
balanced portfolio with approximately equal 
portions in U.S. Treasury bonds and Stocks. 
Therefore, should interest rates decline 
significantly prior to maturity, there is a 
potential for achieving greater returns by 
liquidating the portfolio before the final 
maturity date. Unitholders can sell units at any 
time at the then current net asset value with no 
additional sales charge. (See Public Offering of 
Units--Secondary Market for Units and 
Redemption.) 

 The main objective of PaineWebber in 
constructing the portfolio of stocks to be 
included in the Trust was to select a group of 
stocks which, in PaineWebber's view, would be 
capable of, over the long term, closely tracking 
the performance of the market as measured by the 
S&P 500 Index. The S&P 500 Index is an unmanaged 
index of 500 stocks the value of which is 
calculated by Standard & Poor's Corporation, 
which, in PaineWebber's view, is a broadly 
diversified, representative segment of the market 
of all publicly traded stocks in the United 
States.

 In constructing the Trust's portfolio, a 
computer program was generated against the 500 
S&P stocks to identify a combination of 40 S&P 
500 Index stocks (excluding General Electric and 
those stocks rated "Unattractive" or "Sell" by 
PaineWebber Equity Research) which, when equally 
weighted, are highly correlated (97%) with the 
S&P 500 Index within a 3% tracking error.

 The Trust portfolio, in PaineWebber's opinion, 
is comprised of a diversified group of large, 
well-known companies representing various 
industries. These are common stocks issued by 
companies who may receive income and derive 
revenues from multiple industry sources but whose 
primary source is listed in the table in Part A 
above. For a list of the individual common stocks 
comprising each industry group listed below, 
investors should consult the "Schedule of 
Investments" herein.

 The Sponsor anticipates that, based upon last 
dividends actually paid, dividends from the Stock 
will be sufficient (i) to pay expenses of the 
Trust (see "Expenses of the Trust" herein), and 
(ii) after such payment, to make distributions of 
such to Unitholders as described below under 
"Distributions".

                ABOUT THE TRUST

 The Trust is one of a series of similar but 
separate unit investment trusts created by the 
Sponsor pursuant to a Trust Indenture and 
Agreement* (the "Indenture") dated as of the 
Initial Date of Deposit, among PaineWebber 
Incorporated, as Sponsor and the Investors Bank & 
Trust Company and The First National Bank of 
Chicago, as Co-Trustees (the "Co-Trustees" or 
"Trustee"). The objective of the Trust is 
preservation of capital and capital appreciation 
through an investment in Treasury Obligations and 
Stocks.


*Reference is hereby made to said Trust Indenture 
and Agreement and any statements contained herein 
are qualified in their entirety by the provisions 
of said Trust Indenture and Agreement.
These are equity stocks, which, in Sponsor's 
opinion on the Initial Date of Deposit, are 
capable of, over the long term, closely tracking 
the performance of the market as measured by the 
S&P 500 Index. The Stocks contained in the Trust 
are representative of a number of different 
industries. Dividends, if any, received will be 
held by the Trustee in non-interest bearing 
accounts until used to pay expenses or 
distributed to Unitholders on the next 
Distribution Date and to the extent that funds 
are held therein will benefit the Trustee.

 On the Initial Date of Deposit, the Sponsor 
deposited with the Trustee the confirmations of 
contracts for the purchase of Securities together 
with an irrevocable letter or letters of credit 
of a commercial bank or banks in an amount at 
least equal to the purchase price. The value of 
the Securities was determined on the basis 
described under "Valuation". In exchange for the 
deposit of the contracts to purchase Securities, 
the Trustee delivered to the Sponsor a registered 
certificate for Units representing the entire 
ownership of the Trust. On the Initial Date of 
Deposit the fractional undivided interest in the 
Trust represented by a Unit was as set forth in 
"Essential Information Regarding the Trust".

 With the deposit on the Initial Date of Deposit, 
the Sponsor established a proportionate 
relationship between the maturity value of the 
Treasury Obligations and the number of shares of 
each Stock in the Trust. The Sponsor may, from 
time to time, cause the deposit of additional 
Securities in the Trust when additional Units are 
to be offered to the public, replicating, the 
original percentage relationship between the 
maturity value of the Treasury Obligations and 
the number of shares of Stock deposited on the 
Initial Date of Deposit and replicating any cash 
or cash equivalents held by the Trust (net of 
expenses). The original proportionate 
relationship is subject to adjustment to reflect 
the occurrence of a stock split or other 
corporate action which affects the capital 
structure of the issuer of a Stock but which does 
not affect the Trust's percentage ownership of 
the common stock equity of such issuer at the 
time of such event. Taxable Stock dividends 
received by the Trust, if any, will be sold by 
the Trustee and the proceeds will be treated as 
income to the Trust.

 The Treasury Obligations consist of U.S. 
Treasury obligations which have been stripped of 
their unmatured interest coupons or interest 
coupons stripped from the U.S. Treasury 
Obligations. The obligor with respect to the 
Treasury Obligations is the United States 
Government. U.S. Government backed obligations 
are considered the safest investment.

 On the Initial Date of Deposit each Unit 
represented the fractional undivided interest in 
the Securities and net income of the Trust set 
forth under "Essential Information Regarding the 
Trust". However, if additional Units are issued 
by the Trust (through the deposit of additional 
Securities for purposes of the sale of additional 
Units), the aggregate value of Securities in the 
Trust will be increased and the fractional 
undivided interest represented by each Unit in 
the balance will be decreased. If any Units are 
redeemed, the aggregate value of Securities in 
the Trust Will be reduced, and the fractional 
undivided interest represented by each remaining 
Unit in the balance will be increased. Units will 
remain outstanding until redeemed upon tender to 
the Trustee by any Unitholder (which may include 
the Sponsor) or until the termination of the 
Trust. (See "Termination of the Trust".) 

RISK FACTORS AND SPECIAL CONSIDERATIONS

Risk Factors 

 An investment in the Trust should be made with 
the understanding of the risks inherent in an 
investment in deep discount or "zero-coupon" debt 
obligations and the risks associated with an 
investment in common stocks in general. 

 The Trust contains stripped Treasury Securities 
described below (see "Schedule of Investments"). 
Stripped Treasury Securities consist of 
"interest-only" or "principal-only" portions of 
Treasury Obligations. Interest-only portions of 
Treasury Obligations represent the rights only to 
payment of interest on a date certain, and 
principal-only portions of Treasury Obligations 
represent the rights only to payment of principal 
at a stated maturity. Interest-only and 
principal-only portions of Treasury Obligations 
are deep discount obligations that are 
economically identical to zero-coupon 
obligations; that is, all such instruments are 
debt obligations which make no periodic payment 
of interest prior to maturity. The stripped 
Treasury Securities in the Trust were purchased 
at a deep discount and do not make any periodic 
payments of interest. Instead, the entire payment 
of proceeds will be made upon maturity of such 
Treasury Obligations. The effect of owning deep 
discount bonds which do not make current interest 
payments (such as the stripped Treasury 
Obligations in the Trust Portfolio) is that a 
fixed yield is earned not only on the original 
investment but also, in effect, on all earned 
discount during the life of the discount 
obligation. This implicit reinvestment of 
earnings at the same rate eliminates the risk of 
being unable to reinvest the income on such 
obligations at a rate as high as the implicit 
yield on the discount obligation, but at the same 
time eliminates the holder's ability to reinvest 
at higher rates in the future. For this reason, 
while the full faith and credit of the United 
States government provides a high degree of 
protection against credit risks, sale of Units 
prior to the termination date of the Trust will 
involve substantially greater price fluctuations 
during periods of changing market interest rates 
than would be experienced in connection with sale 
of Units of a Trust which held Treasury 
Obligations which made scheduled interest 
payments on a current basis.

 An investment in Units of the Trust should also 
be made with an understanding of the risks 
inherent in an investment in common stocks in 
general. The general risks are associated with 
the rights to receive payments from the issuer 
which are generally inferior to creditors of, or 
holders of debt obligations or preferred stocks 
issued by, the issuer. Holders of common stocks 
have a right to receive dividends only when and 
if, and in the amounts, declared by the issuer's 
board of directors and to participate in amounts 
available for distribution by the issuer only 
after all other claims against the issuer have 
been paid or provided for. By contrast, holders 
of preferred stocks have the right to receive 
dividends at a fixed rate when and as declared by 
the issuer's board of directors, normally on a 
cumulative basis, but do not participate in other 
amounts available for distribution by the issuing 
corporation. Dividends on cumulative preferred 
stock must be paid before any dividends are paid 
on common stock. Preferred stocks are also 
entitled to rights on liquidation which are 
senior to those of common stocks. For these 
reasons, preferred stocks generally entail less 
risk than common stocks. 

 Common stocks do not represent an obligation of 
the issuer. Therefore they do not offer any 
assurance of income or provide the degree of 
protection of debt securities. The issuance of 
debt securities or even preferred stock by an 
issuer will create prior claims for payment of 
principal, interest and dividends which could 
adversely affect the ability and inclination of 
the issuer to declare or pay dividends on its 
common stock or the rights of holders of common 
stock with respect to assets of the issuer upon 
liquidation or bankruptcy. Unlike debt securities 
which typically have a stated principal amount 
payable at maturity common stocks do not have a 
fixed principal amount or a maturity. 
Additionally, the value of the Stocks, like the 
Treasury Obligations, in the Trust may be 
expected to fluctuate over the life of the Trust 
to values higher or lower than those prevailing 
on the Initial Date of Deposit. The Stocks may 
appreciate or depreciate in value (or pay 
dividends) depending on the full range of 
economic and market influences affecting 
corporate profitability, the financial condition 
of issuers and the prices of equity securities in 
general and the Stocks in particular. 

 Certain of the Stock in the Trust may be ADRs 
which are subject to additional risks. (See 
"Schedule of Investments" herein.) ADRs evidence 
American Depositary Shares ("ADS"), which, in 
turn, represent common stock of foreign issuers 
deposited with a custodian in a depositary. (For 
purposes of this Prospectus, the term "ADR" 
generally includes "ADS".) ADRs involve certain 
investment risks that are different from those 
experienced by Stocks issued by domestic issuers. 
These investment risks include potential future 
political and economic developments and the 
potential establishment of exchange controls, new 
or higher levels of taxation, or other 
governmental actions which might adversely affect 
the payment or receipt of payment of dividends on 
the common stock of foreign issuers underlying 
such ADRs. ADRs may also be subject to current 
foreign taxes, which could reduce the yield on 
such securities. Also, certain foreign issuers 
are not subject to reporting requirements under 
certain U.S. securities laws and therefore may 
make less information publicly available than 
that afforded by their domestic counterparts. 
Further, foreign issuers are not necessarily 
subject to uniform financial reporting, auditing 
and accounting standards, requirements and 
practices such as are applicable to domestic 
issuers. 

 In addition, the securities underlying the ADRs 
held in the Trust are generally denominated, and 
pay dividends, in foreign currency. An investment 
in securities denominated and principally traded 
in foreign currencies involves investment risk 
substantially different than an investment in 
securities that are denominated and principal 
traded in U.S. dollars. This is due to currency 
exchange rate risk, because the U.S. dollar value 
of the shares underlying the ADRs and of their 
dividends will vary with the fluctuations in the 
U.S. dollar foreign exchange rates for the 
relevant currency in which the shares underlying 
the ADRs are denominated. The Trust, however, 
will compute its income in United States dollars, 
and to the extent any of the Stocks in the Trust 
pay income or dividends in foreign currency, the 
Trust's computation of income will be made on the 
date of its receipt by the Trust at the foreign 
exchange rate in effect on such date. PaineWebber 
observes that, in the recent past, most foreign 
currencies have fluctuated widely in value 
against the U.S. dollar for many reasons, 
including the soundness of the world economy, 
supply and demand of the relevant currency, and 
the strength of the relevant regional economy as 
compared to the economies of the United States 
and other countries. Exchange rate fluctuations 
are also dependent, in part, on a number of 
economic factors including economic conditions 
within the relevant country, interest rate 
differentials between currencies, the balance of 
imports and exports of goods and services, and 
transfer of income and capital from one country 
to another. These economic factors in turn are 
influenced by a particular country's monetary and 
fiscal policies, perceived political stability 
(particularly with respect to transfer of 
capital) and investor psychology, especially that 
of institutional investors predicting the future 
relative strength or weakness of a particular 
currency. As a general rule, the currency of a 
country with a low rate of inflation and a 
favorable balance of trade should increase in 
value relative to the currency of a country with 
a high rate of inflation and deficits in the 
balance of trade. 

 There is no assurance that the Trust's objective 
will be achieved. Until distributed, dividends 
and principal received upon the sale of Stocks 
may be reinvested, until the next applicable 
distribution date, in current interest-bearing 
United States Treasury Obligations. (See 
"Administration of the Trust--Reinvestment".) 
(The Treasury Obligations, the current interest-
bearing United States Treasury Obligations if 
any, and the Stocks may be collectively referred 
to as "Securities" herein.) The value of the 
Securities and, therefore, the value of Units may 
be expected to fluctuate. 

 Investors should note that the creation of 
additional Units subsequent to the Initial Date 
of Deposit may have an effect upon the value of 
previously existing Units. To create additional 
Units the Sponsor may deposit cash (or cash 
equivalents, e.g., a bank letter of credit in 
lieu of cash) with instructions to purchase 
Securities in amounts sufficient to maintain, to 
the extent practicable, the percentage 
relationship among the Securities based on the 
price of the Securities at the Evaluation Time on 
the date the cash is deposited. To the extent the 
price of a Security (or the relevant foreign 
currency exchange rate, if applicable) increases 
or decreases between the time cash is deposited 
with instructions to purchase the Security and 
the time the cash is used to purchase the 
Security, Units will represent less or more of 
that Security and more or less of the other 
Securities in the Trust. Unitholders will be at 
risk because of price (and currency) fluctuations 
during this period since if the price of shares 
of a Security increases, Unitholders will have an 
interest in fewer shares of that Security, and if 
the price of a Security decreases, Unitholders 
will have an interest in more shares of that 
Security, than if the Security had been purchased 
on the date cash was deposited with instructions 
to purchase the Security. In order to minimize 
these effects, the Trust will attempt to purchase 
Securities as close as possible to the Evaluation 
Time or at prices as close as possible to the 
prices used to evaluate the Trust at the 
Evaluation Time. Thus price (and currency) 
fluctuations during this period will affect the 
value of every Unitholder's Units and the income 
per Unit received by the Trust. In addition, 
costs incurred in connection with the acquisition 
of Securities not listed on any national 
securities exchange (due to differentials between 
bid and offer prices for the Securities) and 
brokerage fees, stamp taxes and other costs 
incurred in purchasing stocks will be at the 
expense of the Trust and will affect the value of 
every Unitholder's Units.

 Because the Trust is organized as a unit 
investment trust, rather than as a management 
investment company, the Trustee and the Sponsor 
do not have authority to manage the Trust's 
assets fully in an attempt to take advantage of 
various market conditions to improve the Trust's 
net asset value, but may dispose of Securities 
only under limited circumstances. (See 
"Administration of the Trust--Portfolio 
Supervision".) 

 Certain of the Stocks may be attractive 
acquisition candidates pursuant to mergers, 
acquisitions and tender offers. In general, 
tender offers involve a bid by an issuer or other 
acquiror to acquire a stock pursuant to the terms 
of its offer. Payment generally takes the form of 
cash, securities (typically bonds or notes), or 
cash and securities. Pursuant to federal law a 
tender offer must remain open for at least 20 
days and withdrawal rights apply during the 
entire offering period. Frequently offers are 
conditioned upon a specified number of shares 
being tendered and upon the obtaining of 
financing. There may be other conditions to the 
tender offer as well. Additionally, an offeror 
may only be willing to accept a specified number 
of shares. In the event a greater number of 
shares is tendered, the offeror must take up and 
pay for a pro rata portion of the shares 
deposited by each depositor during the period the 
offer remains open. The Agreement contains 
provisions permitting Stocks to be either held or 
sold in the event of a tender offer, merger or 
reorganization involving one or more of the 
Stocks in the Trust (see "Administration of the 
Trust-Portfolio Supervision" herein). 

              FEDERAL INCOME TAXES

 In the opinion of Carter, Ledyard & Milburn, 
counsel for the Sponsor, under existing law:

 1. The Trust is not an association taxable as a 
corporation for federal income tax purposes.  
Under the Internal Revenue Code of 1986, as 
amended (the "Code"), each Unitholder will be 
treated as the owner of a pro rata portion of the 
Trust, and income of the Trust will be treated as 
income of the Unitholder.

 2. Each Unitholder will have a taxable event 
when the Trust disposes of a Security (whether by 
sale, exchange, redemption, or payment at 
maturity) or when the Unitholder sells its Units 
or redeems its Units for cash. The total tax cost 
of each Unit to a Unitholder is allocated among 
each of the Securities in accordance with the 
proportion of the Trust comprised by each 
Security to determine the per Unit tax cost for 
each Security.

 3. The Trust is not an association taxable as a 
corporation for New York State income tax 
purposes.  Under New York State law, each 
Unitholder will be treated as the owner of a pro 
rata portion of the Trust and the income of the 
Trust will be treated as income of the 
Unitholders.

 The following general discussion of the federal 
income tax treatment of an investment in Units of 
the Trust is based on the Code and Treasury 
Regulations promulgated thereunder as in effect 
on the date of this Prospectus.  The federal 
income tax treatment applicable to a Unitholder 
may depend upon the Unitholder's particular tax 
circumstances. The tax treatment of non-U.S. 
investors is not addressed.  Future legislative, 
judicial or administrative changes could modify 
the statements below and could affect the tax 
consequences to Unitholders.  Accordingly, each 
Unitholder is advised to consult its own tax 
advisor concerning the effect of an investment in 
Units.

 General.  Each Unitholder must report on its 
federal income tax return a pro rata share of the 
entire income of the Trust, derived from 
dividends on Stocks, original issue discount or 
interest on Treasury Obligations, gains or losses 
upon sales of Securities by the Trust and a pro 
rata share of the expenses of the Trust.  
Unitholders should note that their taxable income 
from an investment in Units will exceed cash 
distributions because taxable income will include 
accretions of original issue discount on the 
Treasury Obligations, as well as amounts that are 
not distributed to Unitholders but are used by 
the Trust to pay expenses.

 Distributions with respect to Stock, to the 
extent they do not exceed current or accumulated 
earnings and profits of the distributing 
corporation, will be treated as dividends to the 
Unitholders and will be subject to income tax at 
ordinary rates.  Corporate Unitholders may be 
entitled to the dividends-received deduction 
discussed below.

 To the extent distributions with respect to a 
Stock were to exceed the issuing corporation's 
current and accumulated earnings and profits, 
they would not constitute dividends.  Rather, 
they would be treated as a tax free return of 
capital and would reduce a Unitholder's tax basis 
for such Stock.  This reduction in basis would in 
effect increase any gain, or reduce any loss, 
realized by the Unitholder on any subsequent sale 
or other disposition of Units.  After the tax 
cost has been reduced to zero, any additional 
distributions in excess of current and 
accumulated earnings and profits would be taxable 
as gain from sale of Stock.

 A Unitholder who is an individual, estate or 
trust may be disallowed certain itemized 
deductions described in Code Section 67, 
including compensation paid to the Trustee and 
administrative expenses of the Trust, to the 
extent these itemized deductions, in the 
aggregate, do not exceed two percent of the 
Unitholder's adjusted gross income.  Thus, a 
Unitholder's taxable income from an investment in 
Units may exceed amounts distributed to the 
extent amounts are used by the Trust to pay 
expenses.

 Corporate Dividends-Received Deduction.  
Corporate holders of Units may be eligible for 
the dividends-received deduction with respect to 
distributions treated as dividends, subject to 
the limitations provided in Section 246 and 246A 
of the Code.  The dividends-received deduction 
generally equals 70 percent of the amount of the 
dividend.  The alternative minimum tax may have 
the effect of reducing the benefit of the 
deduction.  Individuals, partnerships, trusts, S 
corporations and certain other entities are not 
eligible for the dividends-received deduction.

 Unitholders will be taxed in the manner 
described above regardless of whether 
distributions from the Trust are actually 
received by the Unitholder or are reinvested 
pursuant to the reinvestment plan.

 Original Issue Discount. The Trust will contain 
principal or interest portions of stripped "zero-
coupon" United States Treasury Obligations which 
are treated as bonds that were originally issued 
at a discount ("original issue discount").  
Original issue discount represents interest for 
federal income tax purposes and can generally be 
defined as the difference between the price at 
which a bond was issued and its stated redemption 
price at maturity.  For purposes of the preceding 
sentence, stripped obligations, such as the 
Treasury Obligations, which variously consist 
either of the right to receive payments of 
interest or the right to receive payments of 
principal, are treated by each successive 
purchaser as originally issued on their purchase 
dates at an issue price equal to their respective 
purchase prices thereof.  The market value of the 
Trust assets will be provided to a Unitholder 
upon request in order to enable the Unitholder to 
calculate the original issue discount 
attributable to each of the Treasury Obligations.  
Original issue discount on Treasury Obligations 
(which were issued or treated as issued on or 
after July 2, 1982) is deemed earned over the 
life of such obligation, taking into account the 
compounding of accrued interest at least 
annually, resulting in an increasing amount of 
income in each year.  Each Unitholder is required 
to include in income each year the amount of 
original issue discount which accrues on its pro 
rata portion of each Treasury Obligation which 
(with respect to such Unitholder) has original 
issue discount.  The amount of accrued original 
issue discount included in income with respect to 
a Unitholder's  interest in Treasury Obligations 
is thereupon added to the tax cost for such 
obligations.

 Gain or Loss on Sale.  If a Unitholder sells or 
otherwise disposes of a Unit, the Unitholder 
generally will recognize gain or loss in an 
amount equal to the difference between the amount 
realized on the disposition allocable to the 
Securities and the Unitholder's adjusted tax 
bases in the Securities.  In general, such 
adjusted tax bases will equal the Unitholder's 
aggregate cost for the Unit increased by any 
accrued original issue discount.  Such gain or 
loss will be capital gain or loss if the Unit and 
underlying Securities were held as capital 
assets, except that such gain will be treated as 
ordinary income to the extent of any accrued 
original issue discount not previously reported.  
Each Unitholder generally will also recognize 
taxable gain or loss when all or part of its pro 
rata portion of a Security is sold or otherwise 
disposed of for an amount greater or less than 
its per Unit tax cost therefor.

 Capital gains realized by non-corporate 
taxpayers are generally taxable at a maximum rate 
of 20% if the taxpayer has a holding period of 
more than 12 months.

 Withholding For Citizen or Resident Investors. 
In the case of any non-corporate Unitholder that 
is a citizen or resident of the United States a 
31 percent "backup" withholding tax may apply to 
certain distributions of the Trust unless the 
Unitholder properly completes and files, under 
penalties of perjury, IRS Form W-9 (or its 
equivalent).

 The foregoing discussion is a general summary 
and relates only to certain aspects of the 
federal income tax consequences of an investment 
in the Trust.  Unitholders, may also be subject 
to state and local taxation.  Each Unitholder 
should consult its own tax advisor regarding the 
federal, state and local tax consequences to it 
of ownership of Units.

 Investment in the Trust may be suited for 
purchase by funds and accounts of individual 
investors that are exempt from federal income 
taxes such as Individual Retirement Accounts, 
tax-qualified retirement plans including Keogh 
Plans, and other tax-deferred retirement plans.  
Unitholders desiring to purchase Units for tax-
deferred plans and IRA's should consult their 
PaineWebber Investment Executive for details on 
establishing such accounts.  Units may also be 
purchased by persons who already have self-
directed accounts established under tax-deferred 
retirement plans.

             PUBLIC OFFERING OF UNITS

 Public Offering Price. The public offering price 
in the secondary market will be the Trust Fund 
Evaluation per Unit next determined after receipt 
of a purchase order, determined with respect to 
the Treasury Obligations on the bid side of the 
market, plus the applicable sales charge. (See 
"Valuation".)

 Sales Charge and Volume Discount. Sales charges 
during the initial public offering period and for 
secondary market sales are set forth below. A 
discount in the sales charge is available to 
volume purchasers of Units due to economies of 
scales in sales effort and sales related expenses 
relating to volume purchases. The sales charge 
applicable to volume purchasers of Units is 
reduced on a graduated scale for sales to any 
person of at least $50,000 or 50,000 Units, 
applied on whichever basis is more favorable to 
the purchaser.

Initial Public Offering Period and Secondary Market 
Through January 30, 1999
                        Percent of        Percent of
Aggregate Dollar        Public Offering   Net Amount
Value of Units*         Price             Invested  
Less than $50,000       4.75%             4.99%     
$50,000 to $99,999      4.50              4.71      
$100,000 to $199,999    4.00              4.17      
$200,000 to $399,999    3.50              3.63      
$400,000 to $499,999    3.00              3.09      
$500,000 to $999,999    2.50              2.56      
$1,000,000 or more      2.00              2.04      
_____________
* The sales charge applicable to volume 
purchasers according to the table above will be 
applied on either a dollar or Unit basis, 
depending upon which basis provides a more 
favorable purchase price to the purchaser.

Secondary Market From January 31, 1999 Through 
January 30, 2001
                        Percent of        Percent of
Aggregate Dollar        Public Offering   Net Amount
Value of Units*         Price             Invested  
Less than $50,000       4.25%             4.44%     
$50,000 to $99,999      4.00              4.17      
$100,000 to $199,999    3.50              3.63      
$200,000 to $399,999    3.00              3.09      
$400,000 to $499,999    2.50              2.56      
$500,000 to $999,999    2.00              2.04      
$1,000,000 or more      1.75              1.78      
_____________
* The sales charge applicable to volume 
purchasers according to the table above will be 
applied on either a dollar or Unit basis, 
depending upon which basis provides a more 
favorable purchase price to the purchaser.

Secondary Market From January 31, 2001 
    Through January 30, 2003 
Percent of 
Public             Percent of 
Offering           Net Amount 
Price              Invested 
3.25%              3.36%    

Secondary Market on and After
January 31, 2003
Percent of
Public            Percent of 
Offering          Net Amount
Price             Invested 
2.25%             2.30%

 The volume discount sales charge shown above 
will apply to all purchases of Units on any one 
day by the same person in the amounts stated 
herein, and for this purpose purchases of Units 
of this Trust will be aggregated with concurrent 
purchases of any other trust which may be offered 
by the Sponsor. Units held in the name of the 
purchaser's spouse or in the name of a 
purchaser's child under the age of 21 are deemed 
for the purposes hereof to be registered in the 
name of the purchaser. The reduced sales charges 
are also applicable to a trustee or other 
fiduciary purchasing Units for a single trust 
estate or single fiduciary account. 

 Employee Discount. Due to the realization of 
economies of scale in sales effort and sales 
related expenses with respect to the purchase of 
Units by employees of the Sponsor and its 
affiliates, the Sponsor does not intend to impose 
a sales charge on such employee sales.

 Exchange Option. Unitholders may elect to 
exchange any or all of their Units of this series 
for units of one or more of any series of 
PaineWebber Municipal Bond Fund Series (the 
"PaineWebber Series"); The Municipal Bond Trust, 
(the "National Series"); The Municipal Bond 
Trust, Multi-State Program (the "Multi-State 
Series); The Municipal Bond Trust, California 
Series (the "California Series"); The Municipal 
Bond Trust, Insured Series (the "Insured 
Series"); The Corporate Bond Trust, (the 
"Corporate Series"); The PaineWebber Pathfinders 
Trust, (the "Pathfinders Series"), The 
PaineWebber Federal Government Trust, (the 
"Government Series") or the PaineWebber Equity 
Trust, (the "Equity Series") (collectively 
referred to as the "Exchange Trusts"), at a 
Public Offering Price for the units of the 
Exchange Trusts to be acquired based on a reduced 
sales charge of $15 per unit. Unitholders of this 
Trust are not eligible for the Exchange Option 
into (1) any Exchange Trust designated as a 
rollover series for the 30 day period prior to 
termination of such Trust or (2) any Exchange 
Trust subject to a deferred sales charge. The 
purpose of such reduced sales charge is to permit 
the Sponsor to pass on to the Unitholder who 
wishes to exchange Units the cost savings 
resulting from such exchange of Units. The cost 
savings result from reductions in time and 
expense related to advice, financial planning and 
operational expense required for the Exchange 
Option. Each Exchange Trust has different 
investment objectives, therefore a Unitholder 
should read the prospectus for the applicable 
Exchange Trust carefully prior to exercising this 
option. Exchange Trusts having as their objective 
the receipt of tax-exempt interest income would 
not be suitable for tax-deferred investment plans 
such as Individual Retirement Accounts. A 
Unitholder who purchased Units of a series and 
paid a per unit sales charge that was less than 
the per Unit sales charge of the series of 
Exchange Trusts for which such Unitholder desires 
to exchange into, will be allowed to exercise the 
Exchange Option at the Unit Offering Price plus 
the reduced sales charge, provided the Unitholder 
has held the Units for at least five months. Any 
such Unitholder who has not held the Units to be 
exchanged for the five-month period will be 
required to exchange them at the Unit Offering 
Price plus a sales charge based on the greater of 
the reduced sales charge, or an amount which, 
together with the initial sales charge paid in 
connection with the acquisition of the Units 
being exchanged, equals the sales charge of the 
series of the Exchange Trust for which such 
Unitholder desires to exchange into, determined 
as of the date of the exchange.

 The Sponsor will permit exchanges at the reduced 
sales charge provided there is either a primary 
market for Units or secondary market maintained 
by the Sponsor in both the Units of this series 
and units of the applicable Exchange Trust and 
there are units of the applicable Exchange Trust 
available for sale. While the Sponsor has 
indicated that it intends to maintain a market 
for the Units of the respective Trusts, there is 
no obligation on its part to maintain such a 
market. Therefore, there is no assurance that a 
market for Units will in fact exist on any given 
date at which a Unitholder wishes to sell his 
Units of this series and thus there is no 
assurance that the Exchange Option will be 
available to a Unitholder. Exchanges will be 
effected in whole Units only. Any excess proceeds 
from Unitholders' Units being surrendered will be 
returned. Unitholders will be permitted to 
advance new money in order to complete an 
exchange to round up to the next highest number 
of Units. An exchange of Units pursuant to the 
Exchange Option will normally constitute a 
"taxable event" under the Code and a Unitholder 
will generally recognize a tax gain or loss at 
the time of exchange in the same manner as upon a 
sale of Units. Unitholders are urged to consult 
their own tax advisors as to the tax consequences 
to them of exchanging Units in particular cases. 

 The Sponsor reserves the right to modify, 
suspend or terminate this Exchange Option at any 
time without further notice to Unitholders. In 
the event the Exchange Option is not available to 
a Unitholder at the time he wishes to exercise 
it, the Unitholder will be immediately notified 
and no action will be taken with respect to his 
Units without further instruction from the 
Unitholder.

 To exercise the Exchange Option, a Unitholder 
should notify the Sponsor of his desire to 
exercise the Exchange Option and to use the 
proceeds from the sale of his Units to the 
Sponsor of this series to purchase Units of one 
or more of the Exchange Trusts from the Sponsor. 
If Units of the applicable outstanding series of 
the Exchange Trust are at that time available for 
sale, and if such Units may lawfully be sold in 
the state in which the Unitholder is resident, 
the Unitholder may select the series or group of 
series for which he desires his investment to be 
exchanged. The Unitholder will be provided with a 
current prospectus or prospectuses relating to 
each series in which he indicates interest. 

 The exchange transaction will operate in a 
manner essentially identical to any secondary 
market transaction, i.e., Units will be 
repurchased at a price based on the market value 
of the Securities in the portfolio of the Trust 
next determined after receipt by the Sponsor of 
an exchange request and properly endorsed 
Certificate. Units of the Exchange Trust will be 
sold to the Unitholder at a price based upon the 
next determined market value of the Securities in 
the Exchange Trust plus the reduced sales charge. 
Exchange transactions will be effected only in 
whole units; thus, any proceeds not used to 
acquire whole units will be paid to the selling 
Unitholder. 

 For example, assume that a Unitholder, who has 
three thousand units of a trust with a current 
price of $1.30 per unit, desires to sell his 
units and seeks to exchange the proceeds for 
units of a series of an Exchange Trust with a 
current price of $890 per unit based on the bid 
prices of the underlying securities. In this 
example, which does not contemplate any rounding 
up to the next highest number of Units, the 
proceeds from the Unitholder's units would 
aggregate $3,900. Since only whole units of an 
Exchange Trust may be purchased under the 
Exchange Option, the Unitholder would be able to 
acquire four units in the Exchange Trust for a 
total cost of $3,620 ($3,560 for the units and 
$60 for the sales charge). If all 3,000 units 
were tendered, the remaining $280 would be 
returned to the Unitholder. 

 Conversion Option. Owners of units of any 
registered unit investment trust sponsored by 
another sponsor which was initially offered at a 
maximum applicable sales charge of at least 3.0% 
(a "Conversion Trust") may elect to apply the 
cash proceeds of the sale or redemption of those 
units directly to acquire available units of any 
Exchange Trust at a reduced sales charge of $15 
per Unit (or per 100 Units in the case of 
Exchange Trusts having a Unit price of 
approximately $10, or per 1,000 Units in the case 
of Exchange Trusts having a Unit price of 
approximately $1), subject to the terms and 
conditions applicable to the Exchange Option 
(except that no secondary market is required for 
Conversion Trust units). To exercise this option, 
the owner should notify his retail broker. He 
will be given a prospectus for each series in 
which he indicates interest and for which units 
are available. The dealer must sell or redeem the 
units of the Conversion Trust. Any dealer other 
than PaineWebber must certify that the purchase 
of units of the Exchange Trust is being made 
pursuant to and is eligible for the Conversion 
Option. The dealer will be entitled to two thirds 
of the applicable reduced sales charge. The 
Sponsor reserves the right to modify, suspend or 
terminate the Conversion Option at any time 
without further notice, including the right to 
increase the reduced sales charge applicable to 
this option (but not in excess of $5 more per 
Unit (or per 100 Units or per 1,000 Units, as 
applicable) than the corresponding fee then being 
charged for the Exchange Option). For a 
description of the tax consequences of a 
conversion reference is made to the Exchange 
Option section of the prospectus.

 Distribution of Units. The minimum purchase is 
$250. Only whole Units may be purchased.

 The Sponsor is the sole underwriter of the 
Units. Sales may, however, be made to dealers who 
are members of the National Association of 
Securities Dealers, Inc. ("NASD") at prices which 
include a concession of $.03 per Unit, during the 
initial offering period and one-half of the 
highest applicable sales charge during the 
secondary market, subject to change from time to 
time. The difference between the sales charge and 
the dealer concession will be retained by the 
Sponsor. In the event that the dealer concession 
is 90% or more of the sales charge per Unit, 
dealers taking advantage of such concession may 
be deemed to be underwriters under the Securities 
Act of 1933. 

 The Sponsor reserves the right to reject, in 
whole or in part, any order for the purchase of 
Units. The Sponsor intends to qualify the Units 
in all states of the United States, the District 
of Columbia and the Commonwealth of Puerto Rico. 

 Secondary Market for Units. While not obligated 
to do so, the Sponsor intends to maintain a 
secondary market for the Units and continuously 
offer to purchase Units at the Trust Fund 
Evaluation per Unit next computed after receipt 
by the Sponsor of an order from a Unitholder. The 
Sponsor may cease to maintain such a market at 
any time, and from time to time, without notice. 
In the event that a secondary market for the 
Units is not maintained by the Sponsor, a 
Unitholder desiring to dispose of Units may 
tender such Units to the Trustee for redemption 
at the price calculated in the manner set forth 
under "Redemption". Redemption requests in excess 
of $100,000 may be redeemed "in kind" as 
described under "Redemption." The Sponsor does 
not in any way guarantee the enforceability, 
marketability, value or price of any stocks in 
the Trust, nor that of the Units. 

 The Trust Fund Evaluation per Unit at the time 
of sale or tender for redemption may be less than 
the price at which the Unit was purchased. 

 The Sponsor may redeem any Units it has 
purchased in the secondary market if it 
determines for any reason that it is undesirable 
to continue to hold these Units in its inventory. 
Factors which the Sponsor may consider in making 
this determination will include the number of 
units of all series of all trusts which it holds 
in its inventory, the saleability of the Units 
and its estimate of the time required to sell the 
Units and general market conditions. 

 Sponsor's Profits. In addition to the applicable 
sales charge, the Sponsor realizes a profit (or 
sustains a loss) in the amount of any difference 
between the cost of the Securities to the Sponsor 
and the price (including foreign currency rates, 
if any) at which it deposits the Securities in 
the Trust, which is the value of the Securities, 
determined by the Trustee as described under 
"Valuation," at the close of business on the 
business day prior to the Initial Date of 
Deposit. The cost of Securities to the Sponsor 
includes the amount paid by the Sponsor for 
brokerage commissions. These amounts are an 
expense of the Trust.  Cash, if any, received 
from Unitholders prior to the settlement date for 
the purchase of Units or prior to the payment for 
Securities upon their delivery may be used in the 
Sponsor's business subject to the limitations of 
Rule 15c3-3 under the Securities and Exchange Act 
of 1934 and may be of benefit to the Sponsor. 

 In selling any Units in the initial public 
offering after the Initial Date of Deposit, the 
Sponsor may realize profits or sustain losses 
resulting from fluctuations in the net asset 
value of outstanding Units during that period. In 
maintaining a secondary market for the Units, the 
Sponsor may realize profits or sustain losses in 
the amount of any differences between the price 
at which it buys Units and the price at which it 
resells or redeems such Units.

                 REDEMPTION

 Units may be tendered to Investors Bank & Trust 
Company for redemption at its office in person, 
or by mail at Hancock Towers, 200 Clarendon 
Street, Boston, MA 02116 upon payment of any 
transfer or similar tax which must be paid to 
effect the redemption. At the present time there 
are no such taxes. No redemption fee will be 
charged by the Sponsor or the Trustee. If Units 
are represented by a certificate, it must be 
properly endorsed accompanied by a letter 
requesting redemption. If held in uncertificated 
form, a written instrument of redemption must be 
signed by the Unitholder. Unitholders must sign 
exactly as their names appear on the records of 
the Trustee with signatures guaranteed by an 
eligible guarantor institution or in such other 
manner as may be acceptable to the Trustee. In 
certain instances the Trustee may require 
additional documents such as, but not limited to, 
trust instruments, certificates of death, 
appointments as executor or administrator, or 
certificates of corporate authority. Unitholders 
should contact the Trustee to determine whether 
additional documents are necessary. Units 
tendered to the Trustee for redemption will be 
cancelled, if not repurchased by the Sponsor. 

 Units will be redeemed at the Redemption Value 
per Unit next determined after receipt of the 
redemption request in good order by the Trustee. 
The Redemption Value per Unit is determined by 
dividing the Trust Fund Evaluation by the number 
of Units outstanding. (See "Valuation.") 

 A redemption request is deemed received on the 
business day (See "Valuation" for a definition of 
business day) when such request is received prior 
to 4:00 p.m. If it is received after 4:00 p.m., 
it is deemed received on the next business day. 
During the period in which the Sponsor maintains 
a secondary market for Units, the Sponsor may 
repurchase any Unit presented for tender to 
Investors Bank & Trust Company for redemption no 
later than the close of business on the second 
business day following such presentation and 
Unitholders will receive the Redemption Value 
next determined after receipt by the Trustee of 
the redemption request. Proceeds of a redemption 
will be paid to the Unitholder on the seventh 
calendar day following the date of tender (or if 
the seventh calendar day is not a business day on 
the first business day prior thereto). 

 With respect to cash redemptions, amounts 
representing income received shall be withdrawn 
from the Income Account, and, to the extent such 
balance is insufficient, from the Capital 
Account. The Trustee is empowered, to the extent 
necessary, to sell Securities in such manner as 
is directed by the Sponsor, which direction shall 
be given so as to maximize the objectives of the 
Trust. In the event that no such direction is 
given by the Sponsor, the Trustee is empowered to 
sell Securities as follows: Treasury Obligations 
will be sold so as to maintain in the Trust 
Treasury Obligations in an amount which, upon 
maturity, will equal at least $1.00 per Unit 
outstanding after giving effect to such 
redemption and Stocks having the greatest amount 
of capital appreciation will be sold first. (See 
"Administration of the Trust".) However, with 
respect to redemption requests in excess of 
$100,000, the Sponsor may determine in its 
discretion to direct the Trustee to redeem Units 
"in kind" by distributing Securities to the 
redeeming Unitholder. When Stock is distributed, 
a proportionate amount of Stock will be 
distributed, rounded to avoid the distribution of 
fractional shares and using cash or checks where 
rounding is not possible. The Sponsor may direct 
the Trustee to redeem Units "in kind" even if it 
is then maintaining a secondary market in Units 
of the Trust. Securities will be valued for this 
purpose as set forth under "Valuation". A 
Unitholder receiving a redemption "in kind" may 
incur brokerage or other transaction costs in 
converting the Securities distributed into cash. 
The availability of redemption "in-kind" is 
subject to compliance with all applicable laws 
and regulations, including the Securities Act of 
1933, as amended. 

 To the extent that Securities are redeemed in 
kind or sold, the size and diversity of the Trust 
will be reduced. Sales will usually be required 
at a time when Securities would not otherwise be 
sold and may result in lower prices than might 
otherwise be realized. The price received upon 
redemption may be more or less than the amount 
paid by the Unitholder depending on the value of 
the Securities in the portfolio at the time of 
redemption. In addition, because of the minimum 
amounts in which Securities are required to be 
sold, the proceeds of sale may exceed the amount 
required at the time to redeem Units; these 
excess proceeds will be distributed to 
Unitholders on the Distribution Dates. 

 The Trustee may, in its discretion, and will, 
when so directed by the Sponsor, suspend the 
right of redemption, or postpone the date of 
payment of the Redemption Value, for more than 
seven calendar days following the day of tender 
for any period during which the New York Stock 
Exchange, Inc. is closed other than for weekend 
and holiday closings; or for any period during 
which the Securities and Exchange Commission 
determined that trading on the New York Stock 
Exchange, Inc. is restricted or for any period 
during which an emergency exists as a result of 
which disposal or evaluation of the Securities is 
not reasonably practicable; or for such other 
period as the Securities and Exchange Commission 
may by order permit for the protection of 
Unitholders. The Trustee is not liable to any 
person or in any way for any loss or damages 
which may result from any such suspension or 
postponement, or any failure to suspend or 
postpone when done in the Trustee's discretion.

                 VALUATION

 The Trustee will calculate the Trust's value 
(the "Trust Fund Evaluation") per Unit at the 
Evaluation Time set forth under "Essential 
Information Regarding the Trust" (1) on each June 
30 and December 31 (or the last business day 
prior thereto), (2) on each business day as long 
as the Sponsor is maintaining a bid in the 
secondary market, (3) on the business day on 
which any Unit is tendered for redemption and (4) 
on any other day desired by the Sponsor or the 
Trustee, by adding (a) the aggregate value of the 
Securities and other assets determined by the 
Trustee as set forth below, (b) cash on hand in 
the Trust, income accrued on the Treasury 
Obligations but not distributed or held for 
distribution and dividends receivable on Stocks 
trading ex-dividend (other than any cash held in 
any reserve account established under the 
Indenture) and (c) accounts receivable for 
securities sold and any other assets of the Trust 
Fund not included in (a) and (b) above and 
deducting therefrom the sum of (v) taxes or other 
governmental charges against the Trust not 
previously deducted, (w) accrued fees and 
expenses of the Trustee and the Sponsor 
(including legal and auditing expenses) and other 
Trust expenses, (x) cash allocated for 
distribution to Unitholders, and (y) accounts 
payable for units tendered for redemption and any 
other liabilities of the Trust Fund not included 
in (v), (w) , (x) and (y) above. The per Unit 
Trust Fund Evaluation is calculated by dividing 
the result of such computation by the number of 
Units outstanding as of the date thereof. 
Business days do not include Saturdays, Sundays, 
New Year's Day, Martin Luther King, Jr.'s Day, 
Presidents' Day, Good Friday, Memorial Day, 
Independence Day, Labor Day, Thanksgiving Day and 
Christmas Day and other days that the New York 
Stock Exchange is closed. The U.S. dollar value 
of Stock denominated in foreign currency, if any, 
contained in the Trust, will be based on the 
applicable foreign currency exchange rate 
calculated at the Evaluation Time. 

 The value of Stocks shall be determined by the 
Trustee in good faith in the following manner: 
(1) if the Securities are listed on one or more 
national securities exchanges, such evaluation 
shall be based on the closing sale price on that 
day (unless the Trustee deems such price 
inappropriate as a basis for evaluation) on the 
exchange which is the principal market thereof 
(deemed to be the New York Stock Exchange if the 
Securities are listed thereon) (2) if there is no 
such appropriate closing sale price on such 
exchange, at the mean between the closing bid and 
asked prices on such exchange (unless the Trustee 
deems such price inappropriate as a basis for 
evaluation), (3) if the Securities are not so 
listed or, if so listed and the principal market 
therefor is other than on such exchange or there 
are no such appropriate closing bid and asked 
prices available, such evaluation shall be made 
by the Trustee in good faith based on the closing 
sale price on the over-the-counter market (unless 
the Trustee deems such price inappropriate as a 
basis for evaluation) or (4) if there is no such 
appropriate closing price, then (a) on the basis 
of current bid prices, (b) if bid prices are not 
available, on the basis of current bid prices for 
comparable securities, (c) by the Trustee's 
appraising the value of the Securities in good 
faith on the bid side of the market or (d) by any 
combination thereof. 

 Treasury Obligations are valued on the basis of 
bid prices. The aggregate bid prices of the 
Treasury Obligations, is the price obtained from 
investment dealers or brokers (which may include 
the Sponsor) who customarily deal in Treasury 
Obligations; or, if there is no market for the 
Treasury Obligations, and bid prices are not 
available, on the basis of current bid prices for 
comparable securities; or by appraisal; or by any 
combination of the above, adjusted to reflect 
income accrued. 

COMPARISON OF PUBLIC OFFERING PRICE AND REDEMPTION VALUE

 While the Public Offering Price of Units during 
the initial offering period is determined on the 
basis of the current offering prices of the 
Treasury Obligations, the Public Offering Price 
of Units in the secondary market and the 
Redemption Value is determined on the basis of 
the current bid prices of the Treasury 
Obligations. The Stocks are valued on the same 
basis for the initial and secondary markets and 
for purposes of redemptions. On the business day 
prior to the Initial Date of Deposit, the Public 
Offering Price per Unit (which figure includes 
the sales charge) exceeded the Redemption Value, 
(see: "Essential Information"). The bid and 
offering prices of the Treasury Obligations is 
expected to vary. For this reason and others, 
including the fact that the Public Offering Price 
includes the sales charge, the amount realized by 
a Unitholder upon redemption of Units may be less 
than the price paid by the Unitholder for such 
Units.

              EXPENSES OF THE TRUST

 The cost of the preparation and printing of the 
Certificates, the Indenture and this Prospectus, 
the initial fees of the Trustee and the Trustee's 
counsel, and expenses incurred in establishing 
the Trust including legal and auditing fees and 
initial SEC and state registration fees (the 
"Organizational Expenses"), will be paid by the 
Trust, as is common for mutual funds. 
Historically, the Sponsors of Unit Investment 
Trusts have paid all organizational expenses. The 
Sponsor will receive no fee from the Trust for 
its services in establishing the Trust. 

 The Sponsor will receive a fee, which is earned 
for portfolio supervisory services, and which is 
based upon the largest number of Units 
outstanding during the calendar year. The 
Sponsor's fee, which is initially $.00035 per 
Unit, may exceed the actual costs of providing 
portfolio supervisory services for the Trust, but 
at no time will the total amount it receives for 
portfolio supervisory services rendered to all 
series of the PaineWebber Pathfinders Trust in 
any calendar year exceed the aggregate cost to it 
of supplying such services in such year. 

 For its services as Trustee and Evaluator, the 
Trustee will be paid in monthly installments, 
annually $.00145 per Unit computed monthly based 
upon the largest number of Units outstanding in 
the Trust during the preceding month. In 
addition, the regular and recurring expenses of 
the Trust are estimated to be $.00090 per Unit 
annually which include, but are not limited to 
Organizational Expenses of $.00080 per Unit and 
certain mailing, printing, and audit expenses. 
Expenses in excess of this estimate will be borne 
by the Trust. The Trustee could also benefit to 
the extent that it may hold funds in non-interest 
bearing accounts created by the Indenture. 

 The Sponsor's fee and Trustee's fee may be 
increased without approval of the Unitholders by 
an amount not exceeding a proportionate increase 
in the category entitled "All Services Less Rent" 
in the Consumer Price Index published by the 
United States Department of Labor or if the Price 
Index is no longer published, a similar index as 
determined by the Trustee and Sponsor. 

 In addition to the above, the following charges 
are or may be incurred by each Trust and paid 
from the Income Account, or, to the extent funds 
are not available in such Account, from the 
Capital Account (see "Administration of the 
Trust-Accounts"): (1) fees for the Trustee for 
extraordinary services; (2) expenses of the 
Trustee (including legal and auditing expenses) 
and of counsel; (3) various governmental charges; 
(4) expenses and costs of any action taken by the 
Trustee to protect the trusts and the rights and 
interests of the Unitholders; (5) indemnification 
of the Trustee for any loss, liabilities or 
expenses incurred by it in the administration of 
the Trust without gross negligence, bad faith or 
wilful misconduct on its part; (6) brokerage 
commissions and other expenses incurred in 
connection with the purchase and sale of 
Securities; and (7) expenses incurred upon 
termination of the Trust. In addition, to the 
extent then permitted by the Securities and 
Exchange Commission, the Trust may incur expenses 
of maintaining registration or qualification of 
the Trust or the Units under Federal or state 
securities laws so long as the Sponsor is 
maintaining a secondary market (including, but 
not limited to, legal, auditing and printing 
expenses). 

 The accounts of the Trust shall be audited not 
less than annually by independent auditors 
selected by the Sponsor. The expenses of the 
audit shall be an expense of the Trust. So long 
as the Sponsor maintains a secondary market, the 
Sponsor will bear any audit expense which exceeds 
$.00050 per Unit. Unitholders covered by the 
audit during the year may receive a copy of the 
audited financial statements upon request. 

 The fees and expenses set forth above are 
payable out of the Trust and when unpaid will be 
secured by a lien on the Trust. Based upon the 
last dividend paid prior to the Initial Date of 
Deposit, dividends on the Stocks are expected to 
be sufficient to pay the estimated expenses of 
the Trust. To the extent that dividends paid with 
respect to the Stocks are not sufficient to meet 
the expenses of the Trust, the Trustee is 
authorized to sell Securities in the same manner 
as provided in "Redemption" herein.

              RIGHTS OF UNITHOLDERS

 Ownership of Units is evidenced by recordation 
on the books of the Trustee. In order to avoid 
additional operating costs and for investor 
convenience, certificates will not be issued 
unless a request, in writing with signature 
guaranteed by an eligible guarantor institution 
or in such other manner as may be acceptable to 
the Trustee, is delivered by the Unitholder to 
the Sponsor. Issued Certificates are transferable 
by presentation and surrender to the Trustee at 
its office in Boston, Massachusetts properly 
endorsed or accompanied by a written instrument 
or instruments of transfer. Uncertificated Units 
are transferable by presentation to the Trustee 
at its office of a written instrument of 
transfer. 

 Certificates may be issued in denominations of 
one Unit or any integral multiple thereof as 
deemed appropriate by the Trustee. A Unitholder 
may be required to pay $2.00 per certificate 
reissued or transferred, and shall be required to 
pay any governmental charge that may be imposed 
in connection with each such transfer or 
interchange. For new certificates issued to 
replace destroyed, mutilated, stolen or lost 
certificates, the Unitholder must furnish 
indemnity satisfactory to the Trustee and must 
pay such expenses as the Trustee may incur. 
Mutilated certificates must be surrendered to 
Investors Bank & Trust Company for replacement. 

                DISTRIBUTIONS

 The Trustee will distribute any net income 
received, if any, from the Income Account, 
quarterly on the Distribution Dates to 
Unitholders of record on the preceding Record 
Date. Income with respect to the original issue 
discount on the Treasury Obligations will not be 
distributed although Unitholders will be subject 
to tax as if a distribution had occurred. 
Distributions from the Capital Account will be 
made on quarterly Distribution Dates to 
Unitholders of record on the preceding Record 
Date, provided however, that distributions of 
less than $.00500 per Unit need not be made from 
the Capital Account on any Distribution Date. See 
"Federal Income Taxes". 

 Within a reasonable period after the Trust is 
terminated, each Unitholder will, upon surrender 
of his Certificates for cancellation, receive his 
pro rata share of the amounts realized upon 
disposition of the Securities plus any other 
assets of the Trust, less expenses of the Trust. 
(See "Termination.") 

             ADMINISTRATION OF THE TRUST

 Accounts. All dividends received and interest, 
if any, accrued on Securities, proceeds from the 
sale of Securities or other monies received by 
the Trustee on behalf of the Trust shall be held 
in trust in non-interest bearing accounts until 
required to be disbursed. 

 The Trustee will credit on its books to an 
Income Account any dividends (including stock 
dividends which were sold) and interest, if any, 
accrued by the Trust. All other receipts (i.e. 
return of principal, and gains) are credited on 
its books to a Capital Account. Stock dividends 
received by the Trust, if any, will be sold by 
the Trustee and the proceeds therefrom be treated 
as income to the Trust. A record will be kept of 
qualifying dividends within the Income Account. 
The pro rata share of the Income Account and the 
pro rata share of the Capital Account represented 
by each Unit will be computed by the Trustee as 
set forth under "Valuation". 

 The Trustee will deduct from the Income Account 
and, to the extent funds are not sufficient 
therein, from the Capital Account, amounts 
necessary to pay expenses incurred by the Trust. 
(See "Expenses and Charges.") In addition, the 
Trustee may withdraw from the Income Account and 
the Capital Account such amounts as may be 
necessary to cover redemption of Units by the 
Trustee. (See "Redemption.") 

 The Trustee may establish reserves (the "Reserve 
Account") within the Trust for state and local 
taxes, if any, and any other governmental charges 
payable out of the Trust. 

 Reports and Records. With the distribution of 
income from the Trust, Unitholders will be 
furnished with a statement setting forth the 
amount being distributed from each account. 

 The Trustee keeps records and accounts of the 
Trust at its office in Boston, including records 
of the names and addresses of Unitholders, a 
current list of underlying Securities in the 
portfolio and a copy of the Indenture. Records 
pertaining to a Unitholder or to the Trust (but 
not to other Unitholders) are available to the 
Unitholder for inspection at reasonable times 
during business hours. 

 Within a reasonable period of time after the end 
of each calendar year, starting with calendar 
year 1997, the Trustee will furnish each person 
who was a Unitholder at any time during the 
calendar year an annual report containing the 
following information, expressed in reasonable 
detail both as a dollar amount and as a dollar 
amount per Unit: (1) a summary of transactions 
for such year in the Income and Capital Accounts 
and any Reserves; (2) any Securities sold during 
the year and the Securities held at the end of 
such year; (3) the Trust Fund Evaluation per 
Unit, based upon a computation thereof on the 
31st day of December of such year (or the last 
business day prior thereto); and (4) amounts 
distributed to Unitholders during such year. 

 Portfolio Supervision. The portfolio of the 
Trust is not "managed" by the Sponsor or the 
Trustee; their activities described herein are 
governed solely by the provisions of the 
Indenture. The Indenture provides that the 
Sponsor may (but need not) direct the Trustee to 
dispose of a Security: 

 (1) upon the failure of the issuer to declare or 
pay anticipated dividends or interest; 

 (2) upon the institution of materially adverse 
action or proceeding at law or in equity seeking 
to restrain or enjoin the declaration or payment 
of dividends or interest on any such Securities 
or the existence of any other materially adverse 
legal question or impediment affecting such 
Securities or the declaration or payment of 
dividends or interest on the same;

 (3) upon the breach of covenant or warranty in 
any trust indenture or other document relating to 
the issuer which might materially and adversely 
affect either immediately or contingently the 
declaration or payment of dividends or interest 
on such Securities;

 (4) upon the default in the payment of principal 
or par or stated value of, premium, if any, or 
income on any other outstanding securities of the 
issuer or the guarantor of such securities which 
might materially and adversely, either 
immediately or contingently, affect the 
declaration or payment of dividends or interest 
on the Securities; 

 (5) upon the decline in price or the occurrence 
of any materially adverse market or credit 
factors, that in the opinion of the Sponsor, make 
the retention of such Securities not in the best 
interest of the Unitholder;

 (6) upon a public tender offer being made for a 
Security, or a merger or acquisition being 
announced affecting a Security that in the 
opinion of the Sponsor make the sale or tender of 
the Security in the best interests of the 
Unitholders;

 (7) upon a decrease in the Sponsor's internal 
rating of the Security; or 

 (8) upon the happening of events which, in the 
opinion of the Sponsor, negatively affect the 
economic fundamentals of the issuer of the 
Security or the industry of which it is a part. 

 The Trustee may dispose of Securities where 
necessary to pay Trust expenses or to satisfy 
redemption requests as directed by the Sponsor 
and in a manner necessary to maximize the 
objectives of the Trust, or if not so directed in 
its own discretion, provided however, that 
Treasury Obligations will be sold so as to 
maintain in the Trust Treasury Obligations in an 
amount which, upon maturity, will equal at least 
$1.00 per Unit outstanding after giving effect to 
such redemption and Stocks having the greatest 
appreciation shall be sold first. 

 Reinvestment. Cash received upon the sale of 
Stock (except for sales to meet redemption 
requests) and dividends received may, if and to 
the extent there is no legal or regulatory 
impediment, be reinvested in United States 
Treasury obligations which mature on or prior to 
the next scheduled Distribution Date. The Sponsor 
anticipates that, where permitted, such proceeds 
will be reinvested in current interest-bearing 
United States Treasury obligations unless factors 
exist such that such reinvestment would not be in 
the best interest of Unitholders or would be 
impractical. Such factors may include, among 
others, (i) short reinvestment periods which 
would make reinvestment in United States Treasury 
obligations undesirable or infeasible and (ii) 
amounts not sufficiently large so as to make a 
reinvestment economical or feasible. Any moneys 
held and not reinvested will be held in a non-
interest bearing account until distribution on 
the next Distribution Date to Unitholders of 
record. 

             AMENDMENT OF THE INDENTURE

 The Indenture may be amended by the Trustee and 
the Sponsor without the consent of any of the 
Unitholders to cure any ambiguity or to correct 
or supplement any provision thereof which may be 
defective or inconsistent or to make such other 
provisions as will not materially adversely 
affect the interest of the Unitholders. 

 The Indenture may be amended in any respect by 
the Sponsor and the Trustee with the consent of 
the holders of 51% of the Units then outstanding; 
provided that no such amendment shall (1) reduce 
the interest in the Trust represented by a Unit 
or (2) reduce the percentage of Unitholders 
required to consent to any such amendment, 
without the consent of all Unitholders. 

 The Trustee will promptly notify Unitholders of 
the substance of any amendment affecting 
Unitholders rights or their interest in the 
Trust. 

             TERMINATION OF THE TRUST

 The Indenture provides that the Trust will 
terminate within 15 days after the maturity of 
the Treasury Obligations held n the Trust. If the 
value of the Trust as shown by any evaluation is 
less than twenty percent (20%) of the market 
value of the Securities on the Initial Date of 
Deposit, the Trustee may in its discretion, and 
will when so directed by the Sponsor, terminate 
such Trust. The Trust may also be terminated at 
any time by the written consent of 51% of the 
Unitholders or by the Trustee upon the 
resignation or removal of the Sponsor if the 
Trustee determines termination to be in the best 
interest of the Unitholders. In no event will the 
Trust continue beyond the Mandatory Termination 
Date. 

 As directed by the Sponsor approximately 30 days 
prior to the maturity of the Treasury Obligations 
the Trustee will begin to sell the Stocks held in 
the Trust. Stocks having the greatest amount of 
capital appreciation will be sold first. Upon 
termination of the Trust, the Trustee will sell 
any Stocks then remaining in the Trust and will 
then, after deduction of any fees and expenses of 
the Trust and payment into the Reserve Account of 
any amount required for taxes or other 
governmental charges that may be payable by the 
Trust, distribute to each Unitholder, upon 
surrender for cancellation of his Certificate 
after due notice of such termination, such 
Unitholder's pro rata share in the Income and 
Capital Accounts. Monies held upon the sale of 
Securities will be held in non-interest bearing 
accounts created by the Indenture until 
distributed and will be of benefit to the 
Trustee. The sale of Stocks in the Trust in the 
period prior to termination and upon termination 
may result in a lower amount than might otherwise 
be realized if such sale were not required at 
such time due to impending or actual termination 
of the Trust. For this reason, among others, the 
amount realized by a Unitholder upon termination 
may be less than the amount paid by such 
Unitholder. 

                  SPONSOR

 The Sponsor, PaineWebber Incorporated, is a 
corporation organized under the laws of the State 
of Delaware. The Sponsor is a member firm of the 
New York Stock Exchange, Inc. as well as other 
major securities and commodities exchanges and is 
a member of the National Association of 
Securities Dealers, Inc. The Sponsor is engaged 
in a security and commodity brokerage business as 
well as underwriting and distributing new issues. 
The Sponsor also acts as a dealer in unlisted 
securities and municipal bonds and in addition to 
participating as a member of various selling 
groups or as an agent of other investment 
companies, executes orders on behalf of 
investment companies for the purchase and sale of 
securities of such companies and sells securities 
to such companies in its capacity as a broker or 
dealer in securities. 

 The Indenture provides that the Sponsor will not 
be liable to the Trustee, any of the Trusts or to 
the Unitholders for taking any action or for 
refraining from taking any action made in good 
faith or for errors in judgment, but will be 
liable only for its own wilful misfeasance, bad 
faith, gross negligence or wilful disregard of 
its duties. The Sponsor will not be liable or 
responsible in any way for depreciation or loss 
incurred by reason of the sale of any Securities 
in the Trust. 

 The Indenture is binding upon any successor to 
the business of the Sponsor. The Sponsor may 
transfer all or substantially all of its assets 
to a corporation or partnership which carries on 
the business of the Sponsor and duly assumes all 
the obligations of the Sponsor under the 
Indenture. In such event the Sponsor shall be 
relieved of all further liability under the 
Indenture. 

 If the Sponsor fails to undertake any of its 
duties under the Indenture, becomes incapable of 
acting, becomes bankrupt, or has its affairs 
taken over by public authorities, the Trustee may 
either appoint a successor Sponsor or Sponsors to 
serve at rates of compensation determined as 
provided in the Indenture or terminate the 
Indenture and liquidate the Trust.

                  TRUSTEE

 The Co-Trustees are The First National Bank of 
Chicago, a national banking association with its 
corporate trust office at One First National 
Plaza, Suite 0126, Chicago, Illinois 60670-0126 
(which is subject to supervision by the 
Comptroller of the Currency, the Federal Deposit 
Insurance Corporation and the Board of Governors 
of the Federal Reserve System) and Investors Bank 
& Trust Company, a Massachusetts trust company 
with its office at Hancock Towers, 200 Clarendon 
Street, Boston, Massachusetts 02116, toll-free 
number 1-800-356-2754 (which is subject to 
supervision by the Massachusetts Commissioner of 
Banks, the Federal Deposit Insurance Corporation 
and the Board of Governors of the Federal Reserve 
System). 

 The Indenture provides that the Trustee will not 
be liable for any action taken in good faith in 
reliance on properly executed documents or the 
disposition of moneys, Securities or Certificates 
or in respect of any valuation which it is 
required to make, except by reason of its own 
gross negligence, bad faith or wilful misconduct, 
nor will the Trustee be liable or responsible in 
any way for depreciation or loss incurred by 
reason of the sale by the Trustee of any 
Securities in the Trust. In the event of the 
failure of the Sponsor to act, the Trustee may 
act and will not be liable for any such action 
taken by it in good faith. The Trustee will not 
be personally liable for any taxes or other 
governmental charges imposed upon or in respect 
of the Securities or upon the interest thereon or 
upon it as Trustee or upon or in respect of the 
Trust which the Trustee may be required to pay 
under any present or future law of the United 
States of America or of any other taxing 
authority having jurisdiction. In addition, the 
Indenture contains other customary provisions 
limiting the liability of the Trustee. The 
Trustee will be indemnified and held harmless 
against any loss or liability accruing to it 
without gross negligence, bad faith or wilful 
misconduct on its part, arising out of or in 
connection with its acceptance or administration 
of the Trust, including the costs and expenses 
(including counsel fees) of defending itself 
against any claim of liability. 

              INDEPENDENT AUDITORS

 The Statement of Financial Condition and 
Schedule of Investments audited by Ernst & Young 
LLP, independent auditors, have been included 
herein in reliance upon their report given on 
their authority as experts in accounting and 
auditing.

                LEGAL OPINIONS

 The legality of the Units offered hereby has 
been passed upon by Carter, Ledyard & Milburn, 2 
Wall Street, New York, New York, as counsel for 
the Sponsor.
    

                       CONTENTS OF REGISTRATION STATEMENT
          This registration statement comprises the following
  documents:
          The facing sheet.
          The Prospectus.
          The signatures.
          The following exhibits:
          EX-99.C1     Opinion of Counsel as to legality of securities
                       being registered
          EX-99.C2     Consent of Independent Auditors
                             FINANCIAL STATEMENTS
          1.      Statement of Condition of the Trust as shown in
                  the current Prospectus for this series.
          2.      Financial Statements of the Depositor.
                  PaineWebber Incorporated - Financial Statements
                  incorporated by reference to Form 10-k and
                  Form 10-Q (File No. 1-7367) respectively.
  SIGNATURES
  Pursuant to the requirements of the Securities Act of 1933, the
  registrant, The PaineWebber Pathfinders Trust, Treasury and Growth
  Stock Series 20 certifies that it meets all of the
  requirements for effectiveness of this Registration Statement
  pursuant to Rule 485(b) under the Securities Act of 1933 and has
  duly caused this registration statement to be signed on its behalf
  by the undersigned thereunto duly authorized, and its seal to be 
  hereunto affixed and attested, all in the City of New York, and the
  State of New York on the 29th day of April, 1999.
                     PAINEWEBBER PATHFINDERS TRUST,
                  TREASURY AND GROWTH STOCK SERIES 20
                                  (Registrant)
                              By: PaineWebber Incorporated
                                  (Depositor)
                              /s/ ROBERT E. HOLLEY
                                  Robert E. Holley
                                  Senior Vice President
  Pursuant to the requirements of the Securities Act of 1933, this
  Registration Statement has been signed on behalf of PaineWebber
  Incorporated, the Depositor, by the following persons in the
  following capacities and in the City of New York, and State of New
  York, on this 29th day of April, 1999.
  PAINEWEBBER INCORPORATED
       Name                        Office
  Donald B. Marron            Chairman, Chief Executive Officer
                              and Director of PaineWebber Incorporated*
  Regina A. Dolan             Executive Vice President,
                              Chief Financial Officer and
                              Director of PaineWebber Incorporated*
  Joseph J. Grano, Jr.        President and
                              Director of PaineWebber Incorporated*
  Steve P. Baum               Executive Vice President and
                              Director of PaineWebber Incorporated*
  Robert H. Silver            Executive Vice President and
                              Director of PaineWebber Incorporated*
  Mark B. Sutton              Executive Vice President and
                              Director of PaineWebber Incorporated*
  Margo N. Alexander          Executive Vice President and
                              Director of PaineWebber Incorporated*
  Terry L. Atkinson           Managing Director and
                              Director of PaineWebber Incorporated*
  Brian M. Barefoot           Executive Vice President and
                              Director of PaineWebber Incorporated*
  Michael Culp                Managing Director and
                              Director of PaineWebber Incorporated*
  Edward M. Kerschner         Managing Director and
                              Director of PaineWebber Incorporated*
  James P. MacGilvray         Executive Vice President and
                              Director of PaineWebber Incorporated*
                              By:/s/ ROBERT E. HOLLEY
                                    Attorney-in-fact*
  *  Executed copies of the powers of attorney have been previously
     filed with the Securities and Exchange Commission with the Post
     Effective Amendment to the Registration Statement File No. 2-61279.
  

  April 29, 1999
  PaineWebber Incorporated
  1200 Harbor Blvd.
  Weehawken, New Jersey 07087
  Ladies and Gentlemen:
  We have served as counsel for PaineWebber Incorporated as
  sponsor and depositor (the "Depositor") of PaineWebber
  Pathfinders Trust, Treasury and Growth Stock Series 20 
  (hereinafter referred to as the "Trust"). It is proposed that 
  Post-Effective Amendment No. 2 to the Trust's registration statement
  ("Post-Effective Amendment No. 2") will be filed with the Securities
  and Exchange and dated as of the date hereof in connection with the
  continued issuance by the Trust of an indefinite number of units of
  fractional undivided interest in the Trust (hereinafter referred
  to as the "Units") pursuant to Rule 24f-2 promulgated under the
  provisions of the Investment Company Act of 1940, as amended.
  In this regard, we have examined executed originals or copies of the
  following:
  (a)  The Restated Certificate of Incorporation, as amended, and the
       By-Laws of the Depositor, as amended;
  (b)  Resolutions of the Board of Directors of the Depositor adopted on
       December 3, 1971 relating to the Trust and the sale of the Units;
  (c)  Resolutions of the Executive Committee of the Depositor adopted
       on September 24, 1984;
  (d)  Powers of Attorney referred to in the Amendment;
  (e)  Post-Effective Amendment No. 2 to the Registration Statement on
       Form S-6 (File No. 333-15799) to be filed with the Securities and
       Exchange Commission (the "Commission") in accordance with
       the Securities Act of 1933, as amended, and the rules and
       regulations of the Commission promulgated thereunder
       (collectively, the "1933 Act") proposed to be filed on or about the
       date hereof (the "Amendment");
  (f)  The Notification of Registration of the Trust filed with the
       Commission under the Investment Company Act of 1940, as
       amended (collectively, the "1940 Act") on Form N-8A, as
       amended;
  (g)  The registration of the Trust filed with the Commission under the
       1940 Act on Form N-8B-2 (File No. 811-4158), as amended;
  (h)  The prospectus included in the Amendment (the "Prospectus");
  (i)  The Standard Terms and Conditions of the Trust dated as of
       September 1, 1990, as amended, among the Depositor, and
       Investors Bank & Trust Company and the First National Bank of Chicago
       (the "Co-Trustees"), as successor Co-Trustee, (the "Standard
       Terms");
  (j)  The Trust Indenture dated as of the Initial Date of Deposit, among
       the Depositor, the Co-Trustees and the Evaluator (the "Trust
       Indenture" and, collectively with the Standard Terms, the
       "Indenture and Agreement");
  (k)  The form of certificate of ownership for units (the "Certificate") to
       be issued under the Indenture and Agreement; and
  (l)  Such other pertinent records and documents as we have deemed
       necessary.
       With your permission, in such examination, we have assumed
  the following: (a) the authenticity of original documents and the
  genuineness of all signatures; (b) the conformity to the originals of
  all documents submitted to us as copies; (c) the truth, accuracy,
  and completeness of the information, representations, and warranties
  contained in the records, documents, instruments and certificates we
  have reviewed; (d) except as specifically covered in the opinions set
  forth below, the due authorization, execution, and delivery on behalf
  of the respective parties thereto of documents referred to herein and
  the legal, valid, and binding effect thereof on such parties; and (e)
  the absence of any evidence extrinsic to the provisions of the written
  agreement(s) between the parties that the parties intended a
  meaning contrary to that expressed by those provisions. However,
  we have not examined the securities deposited pursuant to the
  Indenture and Agreement (the "Securities") nor the contracts for the
  Securities.
       We express no opinion as to matters of law in jurisdictions other
  than the State of New York (except "Blue Sky" laws) and the federal laws
  of the United States, except to the extent necessary to render the 
  opinion as to the Depositor in paragraph (i) below with respect to 
  Delaware law.  As you know we are not licensed to practice law in the 
  State of Delaware, and our opinion in paragraph (i) and (iii) as to 
  Delaware law is based solely on review of the official statutes of the 
  State of Delaware.
       Based upon such examination, and having regard for legal
  considerations which we deem relevant, we are of the opinion that:
  (i)  The Depositor is a corporation duly organized, validly existing, and
       in good standing under the laws of the State of Delaware with full
       corporate power to conduct its business as described in the
       Prospectus;
  (ii) The Depositor is duly qualified as a foreign corporation and is in
       good standing as such within the State of New York;
  (iii)The terms and provisions of the Units conform in all material
       respects to the description thereof contained in the Prospectus;
  (iv) The consummation of the transactions contemplated under the
       Indenture and Agreement and the fulfillment of the terms thereof
       will not be in violation of the Depositor's Restated Certificate of
       Incorporation, as amended, or By-Laws, as amended and will not
       conflict with any applicable laws or regulations applicable to the
       Depositor in effect on the date hereof; and
  (v)  The Certificates to be issued by the Trust, when duly executed by
       the Depositor and the Trustee in accordance with the Indenture
       and Agreement, upon delivery against payment therefor as
       described in the Prospectus will constitute fractional undivided
       interests in the Trust enforceable against the Trust in accordance
       with their terms, will be entitled to the benefits of the Indenture
       and Agreement and will be fully paid and non-assessable.
  Our opinion that any document is valid, binding, or enforceable in
  accordance with its terms is qualified as to:
  (a)  limitations imposed by bankruptcy, insolvency, reorganization,
       arrangement, fraudulent conveyance, moratorium, or other laws
       relating to or affecting the enforcement of creditors' rights
       generally;
  (b)  rights to indemnification and contribution which may be limited by
       applicable law or equitable principles; and
  (c)  general principles of equity, regardless of whether such
       enforceability is considered in a proceeding in equity or at law.
       We hereby represent that the Amendment contains no disclosure
  which would render it ineligible to become effective immediately
  upon filing pursuant to paragraph (b) of Rule 485 of the
  Commission.
       We hereby consent to the filing of this opinion as an exhibit to
  the Amendment and to the use of our name wherever it appears in
  the Amendment and the Prospectus.
  Very truly yours,
  /s/ CARTER, LEDYARD & MILBURN

  INDEPENDENT AUDITORS' CONSENT
  We consent to the reference to our firm under the caption
  "Independent Auditors" and to the use of our report dated
  April 15, 1999, in the Registration Statement and related
  Prospectus of the PaineWebber Pathfinders Trust, Treasury
  and Growth Stock Series 20
  /s/ ERNST & YOUNG LLP
  New York, New York
  April 28, 1999


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