GLENBROOK LIFE & ANNUITY CO
POS AM, 1996-03-25
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<PAGE>
   
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH 22, 1996
    
   
                                                               FILE NO. 33-62193
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                           --------------------------
 
   
                                    FORM S-1
    
 
   
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                        POST-EFFECTIVE AMENDMENT NO. 1                       /X/
    
                            ------------------------
 
                       GLENBROOK LIFE AND ANNUITY COMPANY
 
             (Exact Name of Registrant as specified in its charter)
 
   
<TABLE>
<S>                              <C>                            <C>
           ILLINOIS                          6311                  35-1113325
 (State or other jurisdiction    (Primary Standard Industrial   (I.R.S. Employer
              of                 Classification Code Number)     Identification
incorporation or organization)                                      Number)
</TABLE>
    
 
   
                               3100 Sanders Road
                           Northbrook, Illinois 60062
                    (Address of Principal Executive Office)
    
 
   
                               MICHAEL J. VELOTTA
                 VICE PRESIDENT, SECRETARY AND GENERAL COUNSEL
                       GLENBROOK LIFE AND ANNUITY COMPANY
                               3100 SANDERS ROAD
                           NORTHBROOK, ILLINOIS 60062
                                  847/402-2400
                (Name and Complete Address of Agent for Service)
    
 
                           --------------------------
 
                                   COPIES TO:
 
   
   STEPHEN E. ROTH, ESQUIRE                   JOHN R. HEDRICK, ESQUIRE
SUTHERLAND, ASBILL AND BRENNAN                ALLSTATE LIFE FINANCIAL
   1275 PENNSYLVANIA AVENUE                        SERVICES, INC.
    WASHINGTON, D.C. 20004                       3100 SANDERS ROAD
                                                NORTHBROOK, IL 60062
 
                           --------------------------
    
 
   
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
  THE ANNUITY CONTRACT COVERED BY THIS REGISTRATION STATEMENT IS TO BE ISSUED
                               PROMPTLY AND FROM
     TIME TO TIME AFTER THE EFFECTIVE DATE OF THIS REGISTRATION STATEMENT.
    
 
   
 If any of the securities being registered on this Form are to be offered on a
                             delayed or continuous
basis pursuant to Rule 415 under the Securities Act of 1933 check the following
                                    box: /X/
    
 
   
    If  this Form  is filed  to register  additional securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration statement  number  of  the  earlier
effective registration statement for the same offering.  / /
    
 
   
    If  this Form  is a post-effective  amendment filed pursuant  to Rule 462(c)
under the Securities Act,  check the following box  and list the Securities  Act
registration  statement number  of the earlier  effective registration statement
for the same offering.  / /
    
 
   
    If delivery of the propsectus is expected  to be made pursuant to Rule  434,
please check the following box.  / /
    
 
   
                     CALCULATION OF REGISTRATION FEE CHART
    
 
   
<TABLE>
<CAPTION>
                                                      PROPOSED MAXIMUM  PROPOSED MAXIMUM
      TITLE OF EACH CLASS OF           AMOUNT TO       OFFERING PRICE      AGGREGATE         AMOUNT OF
   SECURITIES TO BE REGISTERED       BE REGISTERED       PER SHARE       OFFERING PRICE   REGISTRATION FEE
<S>                                 <C>               <C>               <C>               <C>
Deferred Annuity Contracts and
 Participating Interests
 therein..........................         *                 *                 *                 *
</TABLE>
    
 
   
*These Contracts are not issued in predetermined amounts or units.
    
 
                           --------------------------
 
   
    A maximum aggregate offering price of $50,000,000 was previously registered.
No  additional amount of  securities is being registered  by this post effective
amendment to the registration statement.
    
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                       GLENBROOK LIFE AND ANNUITY COMPANY
                             CROSS REFERENCE SHEET
 
                    PURSUANT TO REGULATION S-K, ITEM 501(B)
 
<TABLE>
<CAPTION>
FORM S-1 ITEM NUMBER AND CAPTION                                                      HEADING IN PROSPECTUS
- -------------------------------------------------------------------  --------------------------------------------------------
<S>        <C>                                                       <C>
 1.        Forepart of the Registration Statement and Outside Front
            Cover Page of Prospectus...............................  Outside Front Cover Page
 2.        Inside Front and Outside Back Cover Pages of
            Prospectus.............................................  Inside Front Cover
 3.        Summary Information, Risk Factors and Ratio of Earnings
            to Fixed Charges.......................................  Inside Front Cover; The Accumulation Phase
 4.        Use of Proceeds.........................................  Investments
 5.        Determination of Offering Price.........................  Not Applicable
 6.        Dilution................................................  Not Applicable
 7.        Selling Security Holders................................  Not Applicable
 8.        Plan of Distribution....................................  Purchase of the Contracts; Distribution of the Contracts
 9.        Description of Securities to be Registered..............  The Purchase of the Contract; The Parties to the
                                                                     Contract; The Death Benefit Provisions; The Payout
                                                                      Phase; Federal Tax Matters; Taxation of Annuities in
                                                                      General
10.        Interests of Named Experts and Counsel..................  Not Applicable
11.        Information with Respect to the Registrant..............  The Company; Business; Selected Financial Data;
                                                                      Competition; Employees; Properties; State and Federal
                                                                      Regulation; Executive Officers and Directors of the
                                                                      Company; Executive Compensation; Legal Proceedings
12.        Disclosure of Commission Position on Indemni-fication
            for Securities Act Liabilities.........................  Not Applicable
</TABLE>
<PAGE>
             GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A
                                   OFFERED BY
                       GLENBROOK LIFE AND ANNUITY COMPANY
                             POST OFFICE BOX 94039
                         PALATINE, ILLINOIS 60094-4039
                                1-(800)776-6978
            INDIVIDUAL AND GROUP FLEXIBLE PREMIUM DEFERRED VARIABLE
                               ANNUITY CONTRACTS
                            ------------------------
 
   
    This  prospectus  describes the  AIM Lifetime  Plus-SM- Variable  Annuity, a
Flexible Premium Deferred Variable Annuity Contract ("Contract") designed to aid
you in  long-term  financial planning  and  which  can be  used  for  retirement
planning.  The  Contracts  are  issued by  Glenbrook  Life  and  Annuity Company
("Company"), a  wholly  owned subsidiary  of  Allstate Life  Insurance  Company.
Purchase  payments for the Contracts  will be allocated to  a series of Variable
Sub-accounts of  the  Glenbrook Life  and  Annuity Company  Separate  Account  A
("Variable  Account") and/or  to a  Fixed Account  option(s) funded  through the
Company's general account.
    
 
   
    The Contracts are issued as individual  Contracts or as group Contracts.  In
states  where the Contracts are available only as group Contracts, a certificate
is issued that summarizes the provisions of the group Contract. For convenience,
this prospectus refers to both Contracts and certificates as "Contracts."
    
 
    The Variable Sub-accounts invest in shares of AIM Variable Insurance  Funds,
Inc.  (the "Fund  Series"). Nine  Funds are  currently available  for investment
within the Variable  Account: (1) AIM  V.I. Capital Appreciation  Fund; (2)  AIM
V.I.  Diversified Income Fund; (3) AIM V.I.  Global Utilities Fund; (4) AIM V.I.
Government Securities Fund; (5)  AIM V.I. Growth Fund;  (6) AIM V.I. Growth  and
Income  Fund; (7) AIM V.I. International Equity  Fund; (8) AIM V.I. Money Market
Fund; and (9) AIM V.I. Value Fund.
 
    This prospectus  presents  information  you  should  know  before  making  a
decision to invest in the Contract and the available Investment Alternatives.
 
   
    The  Contract  Value  will  vary  daily  as  a  function  of  the investment
performance of  the  Sub-accounts  of  our Variable  Account  and  any  interest
credited  to  the Fixed  Account.  The Company  does  not guarantee  any minimum
Contract Value for amounts allocated to the Variable Account. Benefits  provided
by this Contract, when based on the Fixed Account, are subject to a Market Value
Adjustment,  the operation of which may result in upward or downward adjustments
in withdrawal benefits,  death benefits, settlement  values, transfers to  other
Sub-accounts, or periodic income payments.
    
 
   
    THE   CONTRACTS  MAY  BE  DISTRIBUTED   THROUGH  BROKER-DEALERS  WHICH  HAVE
RELATIONSHIPS WITH BANKS OR OTHER FINANCIAL INSTITUTIONS OR BY EMPLOYEES OF SUCH
BANKS; HOWEVER, THE CONTRACTS AND THE INVESTMENTS IN THE FUNDS ARE NOT DEPOSITS,
OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED BY ANY BANK, AND THE FUNDS'  SHARES
ARE  NOT FEDERALLY  INSURED OR  GUARANTEED BY  THE U.S.  GOVERNMENT, THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE  FEDERAL RESERVE BOARD  OR ANY OTHER  AGENCY.
INVESTMENT  IN THE CONTRACTS  INVOLVES INVESTMENT RISKS,  INCLUDING THE POSSIBLE
LOSS OF PRINCIPAL.
    
 
   
    The Company has  prepared and  filed a Statement  of Additional  Information
dated  May 1, 1996 with the U.S. Securities and Exchange Commission. If you wish
to receive the Statement of Additional  Information, you may obtain a free  copy
by calling or writing the Company at the address above. For your convenience, an
order  form for the Statement of Additional Information may be found on page B-2
of this  prospectus.  Before ordering,  you  may wish  to  review the  Table  of
Contents  of  the  Statement  of  Additional Information  on  page  B-1  of this
prospectus. The Statement  of Additional  Information has  been incorporated  by
reference into this prospectus.
    
 
    THIS  PROSPECTUS IS  VALID ONLY  WHEN ACCOMPANIED  OR PRECEDED  BY A CURRENT
PROSPECTUS FOR AIM VARIABLE INSURANCE FUNDS, INC.
 
    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION, NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
    PLEASE READ THIS PROSPECTUS CAREFULLY AND RETAIN IT FOR FUTURE REFERENCE
 
                  The Contract is not available in all states.
 
   
    At least once each Contract year, the Company will send the Owner an  annual
statement  that contains certain information pertinent to the individual Owner's
Contract. The annual statement  details values and  specific Contract data  that
applies  to  each particular  Contract. The  annual  statement does  not contain
financial statements of the Company, although the Company's Financial Statements
are on page F-1 of this Prospectus.  In addition, the Company is subject to  the
informational  requirements  of  the  Securities Exchange  Act  of  1934  and in
accordance therewith files reports and other information with the Securities and
Exchange Commission. Reports and other information  filed by the Company can  be
inspected at the public reference facilities maintained by the Commission at 450
Fifth  Street,  N.W., Washington,  D.C. 20549.  Copies of  such material  can be
obtained from the Public Reference  Section of the Commission, Washington,  D.C.
20549 at prescribed rates.
    
 
    THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFERING IN ANY JURISDICTION IN WHICH
SUCH  OFFERING MAY NOT LAWFULLY BE MADE. NO DEALER, SALESMAN, OR OTHER PERSON IS
AUTHORIZED TO GIVE  ANY INFORMATION  OR MAKE ANY  REPRESENTATIONS IN  CONNECTION
WITH  THIS OFFERING OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN
OR MADE, SUCH OTHER INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON.
 
   
                  THE DATE OF THIS PROSPECTUS IS MAY 1, 1996.
    
<PAGE>
                               TABLE OF CONTENTS
   
<TABLE>
<CAPTION>
                                                       PAGE
                                                       -----
<S>                                                 <C>
GLOSSARY..........................................           3
HIGHLIGHTS........................................           4
SUMMARY OF VARIABLE ACCOUNT EXPENSES..............           5
CONDENSED FINANCIAL INFORMATION...................           7
YIELD AND TOTAL RETURN DISCLOSURE.................           7
FINANCIAL STATEMENTS..............................           8
GLENBROOK LIFE AND ANNUITY COMPANY AND THE
 VARIABLE ACCOUNT.................................           8
  Glenbrook Life and Annuity Company..............           8
  The Variable Account............................           8
THE FUND SERIES...................................           9
  AIM Variable Insurance Funds, Inc...............           9
  Investment Advisor for the Funds................          10
FIXED ACCOUNT.....................................          10
  Example of Interest Crediting During the
   Guarantee Period...............................          10
  Withdrawals or Transfers........................          11
  Market Value Adjustment.........................          11
PURCHASE OF THE CONTRACTS.........................          12
  Purchase Payment Limits.........................          12
  Free-Look Period................................          12
  Crediting of Initial Purchase Payment...........          12
  Allocation of Purchase Payments.................          12
  Accumulation Units..............................          12
  Accumulation Unit Value.........................          12
  Transfers Among Investment Alternatives.........          12
  Dollar Cost Averaging...........................          13
  Automatic Fund Rebalancing......................          13
BENEFITS UNDER THE CONTRACT.......................          13
  Withdrawals.....................................          13
  Income Payments.................................          14
    Payout Start Date for Income Payments.........          14
    Variable Account Income Payments..............          14
    Fixed Amount Income Payments..................          14
    Income Plans..................................          14
DEATH BENEFITS....................................          15
  Distribution Upon Death Payment Provisions......          15
  Death Benefit Amount............................          15
CHARGES AND OTHER DEDUCTIONS......................          16
  Deductions from Purchase Payments...............          16
  Withdrawal Charge (Contingent Deferred Sales
   Charge)........................................          16
  Contract Maintenance Charge.....................          17
  Administrative Expense Charge...................          17
  Mortality and Expense Risk Charge...............          17
  Taxes...........................................          17
  Transfer Charges................................          17
  Fund Expenses...................................          18
 
<CAPTION>
 
                                                       PAGE
                                                       -----
<S>                                                 <C>
GENERAL MATTERS...................................          18
  Owner...........................................          18
  Beneficiary.....................................          18
  Assignments.....................................          18
  Delay of Payments...............................          18
  Modification....................................          18
  Customer Inquiries..............................          18
FEDERAL TAX MATTERS...............................          19
  Introduction....................................          19
  Taxation of Annuities in General................          19
    Tax Deferral..................................          19
    Non-natural Owners............................          19
    Diversification Requirements..................          19
    Ownership Treatment...........................          19
    Delayed Maturity Dates........................          19
    Taxation of Partial and Full Withdrawals......          19
    Taxation of Annuity Payments..................          20
    Taxation of Annuity Death Benefits............          20
    Penalty Tax on Premature Distributions........          20
    Aggregation of Annuity Contracts..............          20
    Tax Qualified Contracts.......................          20
    Restrictions Under Section 403(b) Plans.......          20
    Income Tax Withholding........................          20
DISTRIBUTION OF THE CONTRACTS.....................          21
VOTING RIGHTS.....................................          21
SELECTED FINANCIAL DATA...........................          21
MANAGEMENT'S DISCUSSION AND ANALYSIS OF
 FINANCIAL CONDITION AND RESULTS OF OPERATIONS....          22
  General.........................................          22
  Results of Operations...........................          22
  Financial Position..............................          22
  Liquidity and Capital Resources.................          23
COMPETITION.......................................          23
EMPLOYEES.........................................          23
PROPERTIES........................................          23
STATE AND FEDERAL REGULATION......................          23
EXECUTIVE OFFICERS AND DIRECTORS OF THE COMPANY...          24
EXECUTIVE COMPENSATION............................          25
LEGAL PROCEEDINGS.................................          25
EXPERTS...........................................          25
LEGAL MATTERS.....................................          25
FINANCIAL STATEMENTS..............................         F-1
APPENDIX A - Market Value Adjustment..............         A-1
STATEMENT OF ADDITIONAL INFORMATION: TABLE OF
 CONTENTS.........................................         B-1
ORDER FORM........................................         B-2
</TABLE>
    
 
                                       2
<PAGE>
                                    GLOSSARY
 
    ACCUMULATION UNIT:  A measure of your ownership interest in a Sub-account of
the Variable  Account prior  to the  Payout Start  Date. Analogous,  though  not
identical, to a share owned in a mutual fund.
 
    ACCUMULATION  UNIT  VALUE:   The value  of each  Accumulation Unit  which is
calculated each Valuation Date. Each Sub-account of the Variable Account has its
own distinct Accumulation Unit  Value. Analogous, though  not identical, to  the
share price (net asset value) of a mutual fund.
 
   
    ANNUITANT(S):  The person or persons whose life determines the latest Payout
Start  Date and the amount  and duration of any  income payments for Income Plan
options other than Guaranteed Payments for a Specified Period. Joint  annuitants
are only permitted on or after the Payout Start Date.
    
 
    BENEFICIARY(IES):   The person(s) to whom any  benefits are due when a death
benefit is payable and there is no surviving Owner.
 
    COMPANY("WE," "US"):  Glenbrook Life and Annuity Company.
 
    CONTRACT:  The Glenbrook Life and Annuity Company Flexible Premium  Deferred
Variable  Annuity  Contract,  known  as  the  "AIM  Lifetime  Plus-SM-  Variable
Annuity," that is described in this prospectus.
 
    CONTRACT ANNIVERSARY:   An anniversary  of the  date that  the Contract  was
issued.
 
    CONTRACT  VALUE:   The value of  all amounts accumulated  under the Contract
prior to the  Payout Start Date,  equivalent to the  Accumulation Units in  each
Sub-account  of the Variable  Account multiplied by  the respective Accumulation
Unit Value, plus the value in the Fixed Account.
 
    CONTRACT YEAR:  A period  of 12 months starting with  the issue date or  any
Contract Anniversary.
 
    DEATH  BENEFIT ANNIVERSARY:  Every seventh Contract Anniversary beginning on
the date that the Contract was issued. For example, the issue date, 7th and 14th
Contract Anniversaries are the first three Death Benefit Anniversaries.
 
    FIXED ACCOUNT:  All of  the assets of the Company  that are not in  separate
accounts.
 
    FIXED  SUB-ACCOUNTS:    These Sub-accounts  are  distinguished  by Guarantee
Period(s) and  the  dates  the  period(s)  begin.  The  Fixed  Sub-accounts  are
established  when purchase  payments are  allocated to  the Fixed  Account; when
previous Sub-accounts expire and  a new Guarantee Period  is selected; and  when
You transfer an amount to the Fixed Account.
 
    GUARANTEE  PERIOD:  A period of years for which a specified effective annual
interest rate is guaranteed by the Company.
 
    INCOME PLAN:  One  of several ways  in which a series  of payments are  made
after  the Payout Start  Date. Income payments  are based on  the Contract Value
adjusted by any applicable Market Value  Adjustment and applicable taxes on  the
Payout  Start Date. Income payment amounts may  vary based on any Sub-account of
the Variable Account and/or may be fixed for the duration of the Income Plan.
 
    INVESTMENT ALTERNATIVES:  The Sub-accounts  of the Variable Account and  the
Fixed Account.
 
    MARKET VALUE ADJUSTMENT:  The Market Value Adjustment is the adjustment made
to  the money distributed from a Sub-account  of the Fixed Account, prior to the
end of the Guarantee Period, to reflect the impact of changes in interest  rates
between  the time the Sub-account  of the Fixed Account  was established and the
time of distribution.
 
    NON-QUALIFIED CONTRACTS:  Contracts other than Qualified Contracts.
 
    OWNER(S)("YOU"):   The person  or persons  designated as  the Owner  in  the
Contract.
 
    PAYOUT START DATE:  The date on which income payments begin.
 
    QUALIFIED  CONTRACTS:  Contracts issued under plans that qualify for special
federal income tax treatment  under Sections 401(a), 403(a),  403(b) and 408  of
the Internal Revenue Code.
 
    VALUATION  DATE:   Each day  that the  New York  Stock Exchange  is open for
business. The  Valuation Date  does  not include  such Federal  and  non-Federal
holidays as are observed by the New York Stock Exchange.
 
    VALUATION PERIOD:  The period between successive Valuation Dates, commencing
at  the  close of  regular  trading on  the New  York  Stock Exchange  (which is
normally 4:00pm Eastern Time) and ending as  of the close of regular trading  on
the New York Stock Exchange on the next succeeding Valuation Date.
 
    VARIABLE  ACCOUNT:  Glenbrook Life and Annuity Company Separate Account A, a
separate investment account  established by  the Company to  receive and  invest
purchase payments paid under the Contracts.
 
    VARIABLE  SUB-ACCOUNT:  A portion of the Variable Account invested in shares
of a corresponding Fund. The investment performance of each Variable Sub-account
is linked directly to the investment performance of its corresponding Fund.
 
                                       3
<PAGE>
                                   HIGHLIGHTS
 
THE CONTRACT
 
   
    This  Contract is designed  for long-term financial  planning and retirement
planning. Money can be  allocated to any combination  of Funds and/or the  Fixed
Account.  You have access  to your funds either  through withdrawals of Contract
Value or through periodic income payments.  You bear the entire investment  risk
for Contract Values and income payments based upon the Variable Account, because
values  will vary  depending on  the investment  performance of  the Fund(s) you
select. See "Accumulation Unit Value," page 12 and "Income Plans," page 14.  You
will  also bear the investment risk of  adverse changes in interest rates in the
event amounts are prematurely withdrawn or transferred from Sub-accounts of  the
Fixed Account. See "Fixed Account," page 10.
    
 
FREE-LOOK
 
   
    You  may cancel the  Contract any time  within 20 days  after receipt of the
Contract and receive a full refund  of purchase payments allocated to the  Fixed
Account.  Purchase payments allocated  to the Variable  Account will be returned
after an adjustment to  reflect investment gain or  loss that occurred from  the
date of allocation through the date of cancellation, unless a refund of purchase
payments is required by state or federal law. See "Free-Look Period," page 12.
    
 
HOW TO INVEST
 
   
    Your  first  purchase  payment  must  be  at  least  $5,000  (for  Qualified
Contracts, $2,000). Subsequent purchase payments must be at least $500. Purchase
payments may  also  be made  pursuant  to  an Automatic  Addition  Program.  See
"Purchase  Payment Limits," page 10.  At the time of  your application, you will
allocate your purchase payment among the Investment Alternatives. The allocation
you specify on the  application will be  effective immediately. All  allocations
must  be in whole percents from 0% to  100% (total allocation equals 100%) or in
whole  dollars  (total  allocation  equals  entire  dollar  amount  of  purchase
payment).  Allocations may be  changed by notifying the  Company in writing. See
"Allocation of Purchase Payments," page 12.
    
 
INVESTMENT ALTERNATIVES
 
   
    The Variable Account invests in shares of AIM Variable Insurance Funds, Inc.
(the "Fund Series"). The Fund Series has  a total of nine Funds available  under
the Contract. The Funds include: (1) AIM V.I. Capital Appreciation Fund; (2) AIM
V.I.  Diversified Income Fund; (3) AIM V.I.  Global Utilities Fund; (4) AIM V.I.
Government Securities Fund; (5)  AIM V.I. Growth Fund;  (6) AIM V.I. Growth  and
Income  Fund; (7) AIM V.I. International Equity  Fund; (8) AIM V.I. Money Market
Fund; and (9) AIM V.I. Value Fund.  The assets of each Fund are held  separately
from  the other Funds  and each has distinct  investment objectives and policies
which are  described in  the accompanying  prospectus for  the Fund  Series.  In
addition  to the Variable Account, Owners can also allocate all or part of their
purchase payments to the Fixed Account. See "Fixed Account," on page 10.
    
 
TRANSFERS AMONG INVESTMENT ALTERNATIVES
 
   
    Prior to  the  Payout  Start  Date,  you  may  transfer  amounts  among  the
Investment  Alternatives. The Company reserves the  right to assess a $10 charge
on each transfer in excess of twelve per Contract Year. The Company is presently
waiving this  charge. Transfers  to the  Fixed Account  must be  at least  $500.
Certain  Fixed  Account  transfers  may  be  restricted.  See  "Transfers  Among
Investment Alternatives,"  page 11.  You may  want to  enroll in  a Dollar  Cost
Averaging  Program or  an Automatic Fund  Rebalancing Program.  See "Dollar Cost
Averaging," page 12, and "Automatic Fund Rebalancing," page 13.
    
 
CHARGES AND DEDUCTIONS
 
   
    The costs  of  the Contract  include:  a contract  maintenance  charge  ($35
annually),  a mortality  and expense  risk charge  (deducted daily,  equal on an
annual basis  to  1.35% of  the  Contract's daily  net  assets of  the  Variable
Account),  and an  administrative expense  charge (deducted  daily, equal  on an
annual basis  to  .10%  of the  Contract's  daily  net assets  of  the  Variable
Account).  The Company reserves  the right to  assess a transfer  charge ($10 on
each transfer in excess of twelve per Contract Year). Additional deductions  may
be  made  for  certain  taxes.  See  "Contract  Maintenance  Charge,"  page  17,
"Mortality and Expense Risk Charge,"  page 17, "Administrative Expense  Charge,"
page 17, "Transfer Charges," page 17, and "Taxes," page 17.
    
 
WITHDRAWALS
 
   
    You  may withdraw all or  part of the Contract  Value before the earliest of
the Payout Start Date, the death of any Owner or, if the Owner is not a  natural
person, the death of the Annuitant. Each Contract Year, no withdrawal charges or
Market  Value Adjustments will be applied to  amounts withdrawn up to 10% of the
amount of  purchase payments.  Amounts withdrawn  in excess  of the  10% may  be
subject  to  a withdrawal  charge of  0% to  6% depending  on how  long purchase
payments  have  been  invested  in  the  Contract.  Amounts  withdrawn  from   a
Sub-account of the Fixed Account, in excess of the 10%, except during the 30 day
period  after the Guarantee  Period expires, will  be subject to  a Market Value
Adjustment. See "Withdrawals," page 13, "Withdrawals or Transfers," page 11, and
"Taxation of Annuities in General," page 19.
    
 
                                       4
<PAGE>
DEATH BENEFIT
 
    The Company will pay a death benefit  prior to the Payout Start Date on  the
death  of any Owner or, if  the Owner is not a  natural person, the death of the
Annuitant. See "Death Benefit Amount," page 14.
 
INCOME PAYMENTS
 
    You will  receive periodic  income payments  beginning on  the Payout  Start
Date.  You  may choose  among several  Income  Plans to  fit your  needs. Income
payments may be received for  a specified period or  for life (either single  or
joint  life), with or  without a guaranteed  number of payments.  You can select
income payments that are fixed, variable or a combination of fixed and variable.
See "Income Payments," page 13.
 
                      SUMMARY OF VARIABLE ACCOUNT EXPENSES
 
    The following table illustrates all expenses  and fees that you will  incur.
The  expenses and  fees set forth  in the table  are based on  charges under the
Contracts and on the  expenses of the Variable  Account and the underlying  Fund
Series.
 
OWNER TRANSACTION EXPENSES (ALL SUB-ACCOUNTS)
 
<TABLE>
<S>                                                                                         <C>
Sales Load Imposed on Purchases (as a percentage of purchase payments)....................        None
Contingent Deferred Sales Charge (as a percentage of purchase payments)...................       *
</TABLE>
 
   
<TABLE>
<CAPTION>
                                                                         APPLICABLE
                                                                        SALES CHARGE
NUMBER OF COMPLETE YEARS SINCE PURCHASE                                     AS A
PAYMENT BEING WITHDRAWN WAS MADE                                         PERCENTAGE
- ----------------------------------------------------------------------  ------------
<S>                                                                     <C>
    0 years...........................................................         6%
    1 year............................................................         6%
    2 years...........................................................         5%
    3 years...........................................................         5%
    4 years...........................................................         4%
    5 years...........................................................         4%
    6 years...........................................................         3%
    7 Years or more...................................................         0%
Transfer Fee..........................................................     **
Annual Contract Fee...................................................        $35***
Variable Account Annual Expenses (as a percentage of the Contract's average net
 assets in the Variable Account)
Mortality and Expense Risk Charge.....................................      1.35%
Administrative Expense Charge.........................................      0.10%
Total Variable Account Annual Expenses................................      1.45%
</TABLE>
    
 
- ------------
 
  *  Each Contract  Year up  to 10% of  the amount  of purchase  payments may be
    withdrawn without  a contingent  deferred  sales charge  or a  Market  Value
    Adjustment.
 
 **  No charges will  be imposed on  the first twelve  transfers in any Contract
    Year. The  Company  reserves the  right  to assess  a  $10 charge  for  each
    transfer  in excess of twelve in  any Contract Year, excluding transfers due
    to dollar cost averaging and automatic fund rebalancing.
 
*** The annual Contract Fee  will be waived if total  purchase payments as of  a
    Contract  Anniversary,  or upon  a full  withdrawal, are  $50,000 or  if all
    monies are allocated to the Fixed Account.
 
                                       5
<PAGE>
                                 FUND EXPENSES
                        (AS A PERCENTAGE OF FUND ASSETS)
 
   
<TABLE>
<CAPTION>
                                                                                                           TOTAL FUND
                                                                                 MANAGEMENT     OTHER        ANNUAL
                                     FUND                                           FEES       EXPENSES     EXPENSES
- -------------------------------------------------------------------------------  ----------   ----------   ----------
<S>                                                                              <C>          <C>          <C>
AIM V.I. Capital Appreciation Fund.............................................   0.65%         .10%            .75%
AIM V.I. Growth and Income Fund................................................   0.65%         .52%           1.17%
AIM V.I. Global Utilities Fund (after expense reimbursements)..................   0.00%(1)     1.47%(2)        1.47%
AIM V.I. Diversified Income Fund...............................................   0.60%         .28%            .88%
AIM V.I. Government Securities Fund............................................   0.50%         .69%           1.19%
AIM V.I. Growth Fund...........................................................   0.65%         .19%            .84%
AIM V.I. International Equity Fund.............................................   0.75%         .40%           1.15%
AIM V.I. Value Fund............................................................   0.65%         .10%            .75%
AIM V.I. Money Market Fund.....................................................   0.40%         .13%            .53%
</TABLE>
    
 
- ------------
 
   
(1) The management fees  listed are reduced because  the Investment Advisor  for
    the  Funds,  AIM Advisors,  Inc. is  temporarily  waiving the  imposition of
    certain management fees. If this waiver  were not in effect, the  management
    fees  for the AIM V.I. Global Utilities Fund, as a percentage of each Fund's
    average net assets would be 0.65%.
    
 
   
(2) "Other  Expenses" listed  for the  AIM V.I.  Global Utilities  Fund  include
    expense  reimbursements.  Had there  been  no expense  reimbursements, other
    expenses would have been 1.79%.
    
 
EXAMPLE
 
    You (the Owner)  would pay  the following  cumulative expenses  on a  $1,000
investment, assuming a 5% annual return under the following circumstances:
 
    If  you terminate your Contract or annuitize  for a specified period of less
than 120 months at the end of the applicable time period:
 
   
<TABLE>
<CAPTION>
                                                 FUND                                                      1 YEAR       3 YEARS
- -------------------------------------------------------------------------------------------------------  -----------  -----------
<S>                                                                                                      <C>          <C>
AIM V.I. Capital Appreciation Fund.....................................................................   $      78    $     118
AIM V.I. Growth and Income Fund........................................................................   $      82    $     131
AIM V.I. Global Utilities Fund.........................................................................   $      85    $     140
AIM V.I. Diversified Income Fund.......................................................................   $      79    $     122
AIM V.I. Government Securities Fund....................................................................   $      82    $     131
AIM V.I. Growth Fund...................................................................................   $      79    $     121
AIM V.I. International Equity Fund.....................................................................   $      82    $     130
AIM V.I. Value Fund....................................................................................   $      78    $     118
AIM V.I. Money Market Fund.............................................................................   $      76    $     111
</TABLE>
    
 
    If you do not terminate  your Contract or if  you annuitize for a  specified
period of 120 months or more at the end of the applicable time period:
 
   
<TABLE>
<CAPTION>
                                                 FUND                                                      1 YEAR       3 YEARS
- -------------------------------------------------------------------------------------------------------  -----------  -----------
<S>                                                                                                      <C>          <C>
AIM V.I. Capital Appreciation Fund.....................................................................   $      24    $      73
AIM V.I. Growth and Income Fund........................................................................   $      28    $      86
AIM V.I. Global Utilities Fund.........................................................................   $      31    $      95
AIM V.I. Diversified Income Fund.......................................................................   $      25    $      77
AIM V.I. Government Securities Fund....................................................................   $      28    $      86
AIM V.I. Growth Fund...................................................................................   $      25    $      76
AIM V.I. International Equity Fund.....................................................................   $      28    $      85
AIM V.I. Value Fund....................................................................................   $      24    $      73
AIM V.I. Money Market Fund.............................................................................   $      21    $      66
</TABLE>
    
 
    THE  ABOVE  EXAMPLE SHOULD  NOT BE  CONSIDERED A  REPRESENTATION OF  PAST OR
FUTURE EXPENSE. ACTUAL  EXPENSES MAY BE  GREATER OR LESS  THAN THOSE SHOWN.  The
purpose  of the example is to assist  you in understanding the various costs and
expenses that you will  bear directly or indirectly.  Premium taxes, which  vary
from  0  - 3.5%  depending on  the state  where  the Contract  is sold,  are not
reflected in the example.
 
                                       6
<PAGE>
   
                        CONDENSED FINANCIAL INFORMATION
                      Accumulation Unit Values and Number
                     of Accumulation Units Outstanding for
                        Each Sub-Account since Inception
    
 
   
<TABLE>
<CAPTION>
                                                                                             1995
                                                                                          ----------
<S>                                                                                       <C>
AIM V.I. MONEY MARKET SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................   10.023366
  Number of Units Outstanding, End of Period............................................           0
AIM V.I. GOVERNMENT SECURITIES SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................   10.082005
  Number of Units Outstanding, End of Period............................................           0
AIM V.I. DIVERSIFIED INCOME SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................   10.067806
  Number of Units Outstanding, End of Period............................................           0
AIM V.I. GLOBAL UTILITIES SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................   10.209475
  Number of Units Outstanding, End of Period............................................           0
AIM V.I. GROWTH AND INCOME SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................    9.617647
  Number of Units Outstanding, End of Period............................................         102
AIM V.I. VALUE SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................    9.865204
  Number of Units Outstanding, End of Period............................................         957
AIM V.I. INTERNATIONAL EQUITY SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................   10.182309
  Number of Units Outstanding, End of Period............................................         927
AIM V.I. GROWTH SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................    9.932039
  Number of Units Outstanding, End of Period............................................         103
AIM V.I. CAPITAL APPRECIATION SUB-ACCOUNT
  Accumulation Unit Value, Beginning of Period..........................................   10.000000
  Accumulation Unit Value, End of Period................................................    9.911854
  Number of Units Outstanding, End of Period............................................         987
</TABLE>
    
 
   
    All Sub-Accounts commenced operations on December 4, 1995. The  Accumulation
Unit  Values in this table reflect a  Mortality and Expense Risk Charge of 1.35%
and an Administrative Expense Charge of 0.10%.
    
 
                       YIELD AND TOTAL RETURN DISCLOSURE
 
   
    From time to  time the Variable  Account may advertise  the yield and  total
return   investment  performance  of   one  or  more   Sub-accounts.  Yield  and
standardized total  return  advertisements  include  all  charges  and  expenses
attributable to the Contracts. Including these fees has the effect of decreasing
the  advertised performance of a Sub-account, so that a Sub-account's investment
performance will not be directly comparable to that of an ordinary mutual fund.
    
 
    When a Sub-account advertises its standardized total return it will  usually
be  calculated for one year, five years, and ten years or since inception if the
Sub-account has not been in existence for such periods. Total return is measured
by comparing the value  of an investment  in the Sub-account at  the end of  the
relevant period to the value of the investment at the beginning of the period.
 
                                       7
<PAGE>
    In  addition to the standardized total return, the Sub-account may advertise
a non-standardized total return. This figure will usually be calculated for  one
year,  five years, and ten years or other periods. Non-standardized total return
is measured in the same manner as the standardized total return described above,
except that  the  withdrawal  charges  under  the  Contract  are  not  deducted.
Therefore,  a non-standardized total return for a Sub-account can be higher than
a standardized total return for a Sub-account.
 
    Certain Sub-accounts may advertise yield in addition to total return. Except
in the case of the AIM V.I. Money Market Sub-account, the yield will be computed
in the following  manner: the  net investment income  per unit  earned during  a
recent  one month period  is divided by  the unit value  on the last  day of the
period, and then annualized. This figure  reflects the recurring charges at  the
separate account level.
 
    The  AIM V.I.  Money Market  Sub-account may  advertise, in  addition to the
total return, either yield or the effective yield. The yield in this case refers
to the income generated  by an investment in  that Sub-account over a  seven-day
period  net of recurring  charges at the  separate account level.  The income is
then annualized (i.e., the amount of  income generated by the investment  during
that  week is  assumed to be  generated each week  over a 52-week  period and is
shown as a  percentage of  the investment).  The effective  yield is  calculated
similarly  but when annualized,  the income earned  by an investment  in the AIM
V.I. Money Market Sub-account  is assumed to  be reinvested at  the end of  each
seven-day  period. The  effective yield will  be slightly higher  than the yield
because of the compounding effect of this assumed reinvestment during a  52-week
period.
 
    The  Variable Account  may also disclose  yield, standard  total return, and
non-standard total  return for  periods  prior to  the  date that  the  Variable
Account commenced operations. For periods prior to the date the Variable Account
commenced  operations,  performance  information for  the  Sub-accounts  will be
calculated based on the performance of  the underlying Funds and the  assumption
that  the Sub-accounts were  in existence for  the same periods  as those of the
underlying Funds, with  a level  of charges  equal to  those currently  assessed
against the Sub-accounts.
 
    Please  refer  to  the Statement  of  Additional Information  for  a further
description of the  method used  to calculate  a Sub-account's  yield and  total
return.
 
                              FINANCIAL STATEMENTS
 
   
    The  financial statements of Glenbrook Life  and Annuity Company are on page
F-1 of the prospectus.  The financial statements of  Glenbrook Life and  Annuity
Company  Separate  Account  A  may  be  found  in  the  Statement  of Additional
Information, which is incorporated by  reference into this prospectus and  which
is available upon request. (See order form on page B-2)
    
 
          GLENBROOK LIFE AND ANNUITY COMPANY AND THE VARIABLE ACCOUNT
 
GLENBROOK LIFE AND ANNUITY COMPANY
 
   
    The  Company is  the issuer  of the  Contract. The  Company is  a stock life
insurance company which was organized under the laws of the State of Illinois in
1992. The  Company was  originally organized  under  the laws  of the  State  of
Indiana  in 1965. From  1965 to 1983  the Company was  known as "United Standard
Life Assurance Company" and from 1983 to 1992 the Company was known as  "William
Penn  Life Assurance Company of America." As of the date of this prospectus, the
Company is licensed to operate in the District of Columbia and all states except
New York. The Company intends to  market the Contract in those jurisdictions  in
which  it is licensed to  operate. The Company's home  office is located at 3100
Sanders Road, Northbrook, Illinois 60062.
    
 
   
    The Company is a wholly-owned subsidiary of Allstate Life Insurance  Company
("Allstate Life"), a stock life insurance company incorporated under the laws of
the  State of Illinois.  Allstate Life is a  wholly-owned subsidiary of Allstate
Insurance Company  ("Allstate"), a  stock property-liability  insurance  company
incorporated under the laws of Illinois. All of the outstanding capital stock of
Allstate  is owned  by The Allstate  Corporation ("Corporation").  In June 1995,
Sears, Roebuck and Co.  distributed in a tax-free  dividend to its  stockholders
its 80.2% ownership in the Corporation.
    
 
   
    The  Company  and  Allstate  Life  entered  into  a  reinsurance  agreement,
effective June 5, 1992. Under the reinsurance agreement, Fixed Account  purchase
payments are automatically transferred to Allstate Life and become invested with
the  assets of Allstate  Life, and Allstate  Life accepts 100%  of the liability
under such  contracts.  However, the  obligations  of Allstate  Life  under  the
reinsurance  agreement are to the Company;  the Company remains the sole obligor
under the Contract to the Owners.
    
 
THE VARIABLE ACCOUNT
 
   
    Established on September  6, 1995,  the Glenbrook Life  and Annuity  Company
Separate Account A is a unit investment trust registered with the Securities and
Exchange  Commission under  the Investment  Company Act  of 1940.  However, such
registration does not signify that  the Commission supervises the management  or
investment  practices  or  policies  of  the  Variable  Account.  The investment
performance of  the  Variable  Account  is  entirely  independent  of  both  the
investment  performance of the Company's general  account and the performance of
any other separate account.
    
 
                                       8
<PAGE>
    The Variable Account has been divided into nine Sub-accounts, each of  which
invests  solely in its corresponding Fund  of AIM Variable Insurance Funds, Inc.
Additional Variable Sub-accounts may be added at the discretion of the Company.
 
    The assets of the Variable Account are held separately from the other assets
of the  Company.  They are  not  chargeable  with liabilities  incurred  in  the
Company's  other business operations. Accordingly, the income, capital gains and
capital losses, realized or unrealized, incurred  on the assets of the  Variable
Account  are credited to or charged against  the assets of the Variable Account,
without regard to the income, capital gains or capital losses arising out of any
other business the Company may conduct. The Company's obligations arising  under
the Contracts are general corporate obligations of the Company.
 
                                THE FUND SERIES
 
    The  Variable Account  will invest in  shares of the  AIM Variable Insurance
Funds, Inc.  (the  "Fund  Series").  The Fund  Series  is  registered  with  the
Securities and Exchange Commission as an open-end, series, management investment
company.  Registration of  the Fund Series  does not involve  supervision of its
management, investment  practices or  policies by  the Securities  and  Exchange
Commission.  The Funds are designed to  provide investment vehicles for variable
insurance contracts of various insurance companies, in addition to the  Variable
Account.
 
    Shares  of the Funds are  not deposits, or obligations  of, or guaranteed or
endorsed by any bank  and the shares  are not federally  insured by the  Federal
Deposit Insurance Corporation, the Federal Reserve Board or any other agency.
 
AIM VARIABLE INSURANCE FUNDS, INC.
 
    AIM  Variable  Insurance Funds,  Inc. offers  nine Funds  for use  with this
Contract: (1) AIM V.I Capital Appreciation Fund; (2) AIM V.I Diversified  Income
Fund;  (3) AIM  V.I. Global Utilities  Fund; (4) AIM  V.I. Government Securities
Fund; (5) AIM V.I.  Growth Fund; (6)  AIM V.I. Growth and  Income Fund; (7)  AIM
V.I. International Equity Fund; (8) AIM V.I. Money Market Fund; and (9) AIM V.I.
Value  Fund.  Each Fund  has different  investment  objectives and  policies and
operates as a separate investment fund. The following is a brief description  of
the investment objectives and programs of the Funds:
 
    AIM  V.I.  CAPITAL  APPRECIATION  FUND ("CAPITAL  APPRECIATION  FUND")  is a
diversified Fund which seeks to provide capital appreciation through investments
in common  stocks, with  emphasis on  medium-sized and  smaller emerging  growth
companies.
 
   
    AIM   V.I.  DIVERSIFIED  INCOME  FUND   ("DIVERSIFIED  INCOME  FUND")  is  a
diversified Fund which seeks to achieve a high level of current income primarily
by investing  in a  diversified portfolio  of foreign  and U.S.  government  and
corporate  debt  securities, including  lower rated  high yield  debt securities
(commonly known  as "junk  bonds"). The  risks of  investing in  junk bonds  are
described  in the accompanying  prospectus for the Fund  Series, which should be
read carefully before investing.
    
 
    AIM  V.I.   GLOBAL   UTILITIES  FUND   ("GLOBAL   UTILITIES  FUND")   is   a
non-diversified  Fund which seeks to achieve a high level of current income and,
as  a  secondary  objective,  to  achieve  capital  appreciation,  by  investing
primarily  in common  and preferred stocks  of public  utility companies (either
domestic or foreign).
 
    AIM V.I. GOVERNMENT  SECURITIES FUND  ("GOVERNMENT FUND")  is a  diversified
Fund  which seeks  to achieve  a high  level of  current income  consistent with
reasonable concern  for safety  of  principal by  investing in  debt  securities
issued, guaranteed or otherwise backed by the U.S. Government.
 
    AIM  V.I. GROWTH FUND ("GROWTH  FUND") is a diversified  Fund which seeks to
provide growth  of capital  through investments  primarily in  common stocks  of
leading U.S. companies considered by AIM to have strong earnings momentum.
 
    AIM  V.I. GROWTH AND INCOME  FUND ("GROWTH & INCOME  FUND") is a diversified
Fund which  seeks  to  provide growth  of  capital,  with current  income  as  a
secondary  objective  by investing  primarily in  dividend paying  common stocks
which have prospects for both growth of capital and dividend income.
 
    AIM V.I. INTERNATIONAL EQUITY FUND  ("INTERNATIONAL FUND") is a  diversified
Fund  which  seeks  to  provide  long-term growth  of  capital  by  investing in
international equity securities, the issuers of  which are considered by AIM  to
have strong earnings momentum.
 
    AIM V.I. MONEY MARKET FUND ("MONEY MARKET FUND") is a diversified Fund which
seeks  to provide as  high a level of  current income as  is consistent with the
preservation of capital and liquidity by investing in a diversified portfolio of
money market instruments.
 
    AIM V.I. VALUE  FUND ("VALUE  FUND") is a  diversified Fund  which seeks  to
achieve  long-term growth of capital by investing primarily in equity securities
judged by AIM to be undervalued relative to the current or projected earnings of
the companies issuing the  securities, or relative to  current market values  of
assets  owned by the companies issuing the  securities or relative to the equity
markets generally. Income is a secondary objective.
 
                                       9
<PAGE>
INVESTMENT ADVISOR FOR THE FUNDS
 
   
    AIM Advisors, Inc., ("AIM") serves as  the investment advisor to each  Fund.
AIM  was organized in 1976 and, together with its affiliates, manages or advises
38 investment company portfolios  (including the Funds). AIM  is a wholly  owned
subsidiary of AIM Management Group Inc., a holding company. AIM manages pursuant
to  a master  investment advisory agreement  dated October 18,  1993, as amended
April 28, 1994. As of February 26, 1996, total assets advised or managed by  AIM
and its affiliates were approximately $49 billion.
    
 
    There  is no  assurance that the  Funds will attain  their respective stated
objectives. Additional  information  concerning the  investment  objectives  and
policies of the Funds can be found in the current prospectus for the Fund Series
accompanying this prospectus.
 
    You will find more complete information about the Funds, including the risks
associated  with each Fund, in the  accompanying prospectus. You should read the
prospectus for the Fund Series in conjunction with this prospectus.
 
    THE FUND SERIES PROSPECTUS SHOULD BE  READ CAREFULLY BEFORE ANY DECISION  IS
MADE  CONCERNING THE  ALLOCATION OF PURCHASE  PAYMENTS TO  A PARTICULAR VARIABLE
SUB-ACCOUNT.
 
                                 FIXED ACCOUNT
 
    Purchase payments and transfers allocated to one or more of the Sub-accounts
of the Fixed Account  become part of  the general account  of the Company.  Each
Sub-account  offers a separate interest rate Guarantee Period. Guarantee Periods
will be offered at the Company's discretion and may range from one to ten years.
Presently, the Company offers Guarantee Periods  of one, three, five, seven  and
ten  years. The Owner must  select the Sub-account(s) in  which to allocate each
purchase payment and transfer.  No less than  $500 may be  allocated to any  one
Sub-account.  The Company reserves  the right to limit  the number of additional
purchase payments. The Fixed Account Investment Alternative may not be available
in all  states.  Please  consult  with your  sales  representative  for  current
information.
 
    Interest  is credited daily to each Sub-account at a rate which compounds to
the effective annual  interest rate  declared for  each Sub-account's  Guarantee
Period that has been selected.
 
    The   following  example  illustrates  how   the  Sub-account  value  for  a
Sub-account of the Fixed Account would  grow given an assumed purchase  payment,
Guarantee Period, and effective annual interest rate:
 
EXAMPLE OF INTEREST CREDITING DURING THE GUARANTEE PERIOD:
 
<TABLE>
<S>                                                                                     <C>
Purchase Payment:.....................................................................  $10,000.00
Guarantee Period:.....................................................................    5 years
Effective Annual Rate:................................................................      4.75%
</TABLE>
 
                             END OF CONTRACT YEAR:
 
<TABLE>
<CAPTION>
                                                             YEAR 1      YEAR 2      YEAR 3      YEAR 4      YEAR 5
                                                           ----------  ----------  ----------  ----------  ----------
<S>                                                        <C>         <C>         <C>         <C>         <C>
Beginning Sub-Account Value                                $10,000.00
  X (1 + Effective Annual Rate)                                1.0475
                                                           ----------
                                                           $10,475.00
Sub-Account Value at end of Contract                                   $10,475.00
  year 1 X (1 + Effective Annual Rate)                                     1.0475
                                                                       ----------
                                                                       $10,972.56
Sub-Account Value at end of Contract                                               $10,972.56
  year 2 X (1 + Effective Annual Rate)                                                 1.0475
                                                                                   ----------
                                                                                   $11,493.76
Sub-Account Value at end of Contract                                                           $11,493.76
  year 3 X (1 + Effective Annual Rate)                                                             1.0475
                                                                                               ----------
                                                                                               $12,039.71
Sub-Account Value at end of Contract                                                                       $12,039.71
  year 4 X (1 + Effective Annual Rate)                                                                         1.0475
                                                                                                           ----------
Sub-Account Value at end of Guarantee Period:                                                              $12,611.60
                                                                                                           ----------
                                                                                                           ----------
TOTAL INTEREST CREDITED IN GUARANTEE PERIOD: $2,611.60 ($12,611.60 -$10,000.00)
</TABLE>
 
NOTE:  The  above illustration assumes  no withdrawals of  any amount during the
       entire  five  year  period.  A  withdrawal  charge  and  a  Market  Value
       Adjustment  may apply  to any  amount withdrawn in  excess of  10% of the
       amount of  purchase  payments.  The hypothetical  interest  rate  is  for
       illustrative purposes only and is not intended to predict future interest
       rates to be declared under the Contract.
 
                                       10
<PAGE>
   
    The  Company has  no specific formula  for determining the  rate of interest
that it will declare  initially or in  the future. Such  interest rates will  be
reflective  of investment returns available at the time of the determination. In
addition, the management of the Company may also consider various other  factors
in  determining interest rates, including regulatory and tax requirements, sales
commissions and administrative expenses borne  by the Company, general  economic
trends,  and competitive factors. The Company guarantees that the interest rates
will never be less than the minimum  guaranteed rate shown in the Contract.  For
current  interest rate information, please  contact your sales representative or
the Company's Customer Support Unit at 1(800)776-6978.
    
 
    THE MANAGEMENT OF THE  COMPANY WILL MAKE THE  FINAL DETERMINATION AS TO  THE
INTEREST  RATES TO  BE DECLARED. THE  COMPANY CAN NEITHER  PREDICT NOR GUARANTEE
FUTURE INTEREST RATES TO BE DECLARED.
 
    Prior to the end of a Guarantee Period, a notice will be mailed to the Owner
outlining the options available at the end of a Guarantee Period. During the  30
day period after a Guarantee Period expires the Owner may:
 
    - take  no action and  the Company will  automatically renew the Sub-account
      value to a Guarantee Period of the same duration to be established on  the
      day the previous Guaranteed Period expired; or
 
    - notify  the  Company to  apply the  Sub-account value  to a  new Guarantee
      Period or periods  to be  established on  the day  the previous  Guarantee
      Period expired; or
 
    - notify  the Company to  apply the Sub-account value  to any Sub-account of
      the Variable Account on the day we receive the notification; or
 
    - receive a portion of the Sub-account value or the entire Sub-account value
      through a partial or full withdrawal that is not subject to a Market Value
      Adjustment. In this case, the amount withdrawn will be deemed to have been
      withdrawn on the day the guarantee period expired.
 
    The Automatic Laddering Program allows the Owner to choose, in advance,  one
renewal Guarantee Period for all renewing Sub-accounts. The Owner can select the
Automatic Laddering Program at any time during the accumulation phase, including
on the issue date. The Automatic Laddering Program will continue until the Owner
gives  written  notice  to  the  Company.  The  Company  reserves  the  right to
discontinue this Program. For additional information on the Automatic  Laddering
Program, please call the Company's Customer Support Unit at 1(800)776-6978.
 
WITHDRAWALS OR TRANSFERS
 
    With  the  exception of  transfers  made automatically  through  dollar cost
averaging, all withdrawals and transfers, paid  from a Sub-account of the  Fixed
Account other than during the 30 day period after a Guarantee Period expires are
subject to a Market Value Adjustment.
 
    The  amount  received by  the Owner  under a  withdrawal request  equals the
amount requested, adjusted by any  Market Value Adjustment, less any  applicable
withdrawal  charge (based  upon the amount  requested prior to  any Market Value
Adjustment), less premium taxes and withholding (if applicable).
 
MARKET VALUE ADJUSTMENT
 
    The Market  Value  Adjustment  reflects the  relationship  between  (1)  the
Treasury  Rate for the time remaining in the Guarantee Period at the time of the
request for withdrawal or transfer,  and (2) the Treasury  Rate at the time  the
Sub-account was established. As such, the Owner bears some investment risk under
the Contract. Treasury Rate means the U.S. Treasury Note Constant Maturity yield
for the preceding week as reported in Federal Reserve Bulletin Release H.15.
 
    Generally,  if the Treasury Rate for the Guarantee Period is higher than the
applicable current Treasury Rate, then  the Market Value Adjustment will  result
in  a  higher amount  payable to  the  Owner or  transferred. Similarly,  if the
Treasury Rate at  the time  the Sub-account was  established is  lower than  the
applicable Treasury Rate (interest rate for a period equal to the time remaining
in  the Sub-account), then  the Market Value  Adjustment will result  in a lower
amount payable to the Owner or transferred.
 
    For example, assume the  Owner purchases a Contract  and selects an  initial
Guarantee Period of five years and the five year Treasury Rate for that duration
is  4.75%.  Assume  that at  the  end of  3  years,  the Owner  makes  a partial
withdrawal. If, at that later time, the current two year Treasury Rate is 4.00%,
then the  Market Value  Adjustment will  be positive,  which will  result in  an
increase  in the amount payable to the Owner. Similarly, if the current two year
Treasury Rate is 7.00%, then the Market Value Adjustment will be negative, which
will result in a decrease in the amount payable to the Owner.
 
    The formula for  calculating the  Market Value  Adjustment is  set forth  in
Appendix  A to this  prospectus which also  contains additional illustrations of
the application of the Market Value Adjustment.
 
                                       11
<PAGE>
                           PURCHASE OF THE CONTRACTS
 
PURCHASE PAYMENT LIMITS
 
    Your first purchase payment must be at least $5,000 unless the Contract is a
Qualified Contract, in which  case the first purchase  payment must be at  least
$2,000. All subsequent purchase payments must be $500 or more and may be made at
any  time prior to the Payout Start  Date. Subsequent purchase payments may also
be made from your bank account  through Automatic Additions. Under an  Automatic
Additions  Program, the minimum purchase payment  for allocation to the Variable
Account is $100  and for allocation  to the Fixed  Account the minimum  purchase
payment  is $500.  Please consult  with your  sales representative  for detailed
information about Automatic Additions.
 
    We reserve  the right  to limit  the  amount of  purchase payments  we  will
accept.
 
FREE-LOOK PERIOD
 
    You  may cancel the  Contract any time  within 20 days  after receipt of the
Contract and receive a full refund  of purchase payments allocated to the  Fixed
Account.  Purchase payments allocated  to the Variable  Account will be returned
after an adjustment to  reflect investment gain or  loss that occurred from  the
date  of allocation through the date of cancellation unless a refund of purchase
payments is required by state or federal law.
 
CREDITING OF INITIAL PURCHASE PAYMENT
 
    The initial purchase  payment accompanied  by a  duly completed  application
will  be credited to the  Contract within two business days  of receipt by us at
our home office. If  an application is  not duly completed,  we will credit  the
purchase payments to the Contract within five business days or return it at that
time  unless you specifically  consent to us holding  the purchase payment until
the application is  complete. We reserve  the right to  reject any  application.
Subsequent  purchase payments will be  credited to the Contract  at the close of
the Valuation Period in which the purchase payment is received by the Company at
its home office.
 
ALLOCATION OF PURCHASE PAYMENTS
 
   
    On the application,  you instruct us  how to allocate  the purchase  payment
among  the Investment  Alternatives. Purchase payments  may be  allocated to any
Investment Alternative  in whole  percents, from  0% to  100% (total  allocation
equals  100%) or in whole dollars  (total allocation equals entire dollar amount
of purchase payments).  Unless you  notify us in  writing otherwise,  subsequent
purchase  payments are  allocated according to  the allocation  for the previous
purchase payment. Any change in allocation instructions will be effective at the
time we receive the notice in good order.
    
 
ACCUMULATION UNITS
 
    Each purchase payment allocated to the Variable Account will be credited  to
the  Contract as Accumulation Units. For  example, if a $10,000 purchase payment
is credited to the  Contract when the Accumulation  Unit value equals $10,  then
1,000  Accumulation  Units  would  be credited  to  the  Contract.  The Variable
Account, in turn, purchases shares of the corresponding Fund.
 
ACCUMULATION UNIT VALUE
 
    The Accumulation  Units in  each  Sub-account of  the Variable  Account  are
valued  separately. The value  of Accumulation Units  will change each Valuation
Period according to the investment performance  of the shares purchased by  each
Variable Sub-account and the deduction of certain expenses and charges.
 
    The  value  of  an  Accumulation  Unit in  a  Variable  Sub-account  for any
Valuation Period equals the value of the Accumulation Unit as of the immediately
preceding Valuation Period,  multiplied by  the Net Investment  Factor for  that
Sub-account  for the current  Valuation Period. The Net  Investment Factor for a
Valuation Period is a number representing  the change, since the last  Valuation
Date  in the value of Sub-account assets per Accumulation Unit due to investment
income, realized or unrealized  capital gain or loss,  deductions for taxes,  if
any, and deductions for the mortality and expense risk charge and administrative
expense charge.
 
TRANSFERS AMONG INVESTMENT ALTERNATIVES
 
   
    Amounts  may be  transferred among  Investment Alternatives,  subject to the
following restrictions. The Company reserves the right to assess a $10 charge on
each transfer in excess  of twelve per Contract  Year. The Company is  presently
waiving  this charge. Transfers to or  from more than one Investment Alternative
on the same day are treated as one transfer.
    
 
   
    Transfers among Investment Alternatives before the Payout Start Date may  be
made  at any time. See "Withdrawals or  Transfers," page 10 for the requirements
on transfers from  the Fixed  Account. After  the Payout  Start Date,  transfers
among  Sub-accounts of  the Variable  Account or  from a  variable amount income
payment to a fixed amount income payment may be made only once every six  months
and may not be made during the first six months following the Payout Start Date.
After  the Payout Start Date,  transfers from a fixed  amount income payment are
not allowed.
    
 
    Telephone transfer requests will be accepted  by the Company if received  at
1(800)776-6978  by 3:00 p.m., Central Time. Telephone transfer requests received
at any other  telephone number  or after  3:00 p.m.,  Central Time  will not  be
accepted  by the Company. Telephone transfer requests received before 3:00 p.m.,
Central Time  are effected  at the  next computed  value. The  Company  utilizes
procedures which
 
                                       12
<PAGE>
the Company believes will provide reasonable assurance that telephone authorized
transfers are genuine. Such procedures include taping of telephone conversations
with  persons purporting to authorize  such transfers and requesting identifying
information from such persons. Accordingly, the Company disclaims any  liability
for losses resulting from such transfers by reason of their allegedly not having
been properly authorized. However, if the Company does not take reasonable steps
to help ensure that such authorizations are valid, the Company may be liable for
such losses.
 
    The  minimum amount that may be transferred  into a Sub-account of the Fixed
Account is $500. Any transfer from a Sub-account of the Fixed Account at a  time
other  than during the  30 day period  after a Guarantee  Period expires will be
subject to a Market  Value Adjustment. If  any transfer reduces  the value of  a
Sub-account  of the Fixed Account to less  than $500, the Company will treat the
request as a transfer of the entire Sub-account value.
 
    The Company reserves the right to waive transfer restrictions.
 
DOLLAR COST AVERAGING
 
   
    Transfers may be made automatically  through Dollar Cost Averaging prior  to
the  Payout Start Date.  Dollar Cost Averaging  permits the Owner  to transfer a
specified amount every month from the  one year Guarantee Period Sub-account  of
the Fixed Account or any of the Variable Sub-accounts, to any Sub-account of the
Variable  Account. Dollar Cost  Averaging cannot be used  to transfer amounts to
the Fixed Account. Transfers made through Dollar Cost Averaging are not  subject
to a Market Value Adjustment. In addition, such transfers are not assessed a $10
charge and are not included in the twelve free transfers per Contract Year.
    
 
    The  theory of Dollar Cost  Averaging is that, if  purchases of equal dollar
amounts are made at fluctuating prices, the aggregate average cost per unit will
be less than the average of the unit prices on the same purchase dates. However,
participation in the  Dollar Cost  Averaging program does  not assure  you of  a
greater  profit from your  purchases under the  program; nor will  it prevent or
alleviate losses in a declining market.
 
AUTOMATIC FUND REBALANCING
 
    Transfers may be made automatically through Automatic Fund Rebalancing prior
to the Payout  Start Date. By  electing Automatic Fund  Rebalancing, all of  the
money  allocated to Sub-accounts  of the Variable Account  will be rebalanced to
the desired allocation on a quarterly basis, determined from the first date that
you  decide  to  rebalance.  Each  quarter,  money  will  be  transferred  among
Sub-accounts of the Variable Account to achieve the desired allocation.
 
    The  desired allocation  will be  the allocation  initially selected, unless
subsequently changed. You  may change the  allocation at any  time by giving  us
written  notice. The new allocation will be effective with the first rebalancing
that occurs after  we receive the  written request. We  are not responsible  for
rebalancing that occurs prior to receipt of the written request.
 
    Transfers  made through  Automatic Fund Rebalancing  are not  assessed a $10
charge and are not included in the twelve free transfers per Contract Year.
 
    Any money  allocated  to the  Fixed  Account will  not  be included  in  the
rebalancing.
 
                          BENEFITS UNDER THE CONTRACT
 
WITHDRAWALS
 
   
    You  may withdraw all or part of the Contract Value at any time prior to the
earlier of the  death of  the Owner  (or the  Annuitant if  the Owner  is not  a
natural person) or the Payout Start Date. The amount available for withdrawal is
the  Contract Value next computed  after the Company receives  the request for a
withdrawal  at  its  home  office,  adjusted  by  any  applicable  Market  Value
Adjustment,  less any withdrawal  charges, contract maintenance  charges and any
premium taxes. Withdrawals from the Variable  Account will be paid within  seven
days   of  receipt   of  the  request,   subject  to   postponement  in  certain
circumstances. See "Delay of Payments," page 18.
    
 
   
    Money can be withdrawn  from the Variable Account  or the Fixed Account.  To
complete  the partial  withdrawal from  the Variable  Account, the  Company will
redeem Accumulation  Units  in  an  amount  equal  to  the  withdrawal  and  any
applicable  withdrawal  charge  and  premium  taxes.  The  Owner  must  name the
Investment Alternatives from  which the  withdrawal is to  be made.  If none  is
named, then the withdrawal request is incomplete and cannot be honored.
    
 
    The  minimum partial withdrawal is $50.  If any withdrawal reduces the value
of any Sub-account of  the Fixed Account  to less than $500,  we will treat  the
request  as a withdrawal of the entire  Sub-account value. If the Contract Value
after a partial  withdrawal would  be less than  $1,000, then  the Company  will
treat the request as one for termination of the Contract and the entire Contract
Value,  adjusted by  any Market Value  Adjustment, less any  charges and premium
taxes, will be paid out.
 
    Partial withdrawals  may  also  be taken  automatically  through  Systematic
Withdrawals  on a  monthly, quarterly,  semi-annual or  annual basis. Systematic
Withdrawals of $50  or more may  be requested at  any time prior  to the  Payout
Start  Date.  At the  Company's discretion,  Systematic  Withdrawals may  not be
offered in conjunction with Dollar Cost Averaging or Automatic Fund Rebalancing.
 
                                       13
<PAGE>
   
    Partial and full  withdrawals may be  subject to  income tax and  a 10%  tax
penalty.  This tax and penalty  are explained in "Federal  Tax Matters," on page
19.
    
 
   
    After the Payout Start  Date, withdrawals are  only permitted when  payments
from the Variable Account are being made for a specified number of payments only
(i.e.  Income Plan  3). In  that case,  you may  terminate the  Variable Account
portion of the income payments at any time  and receive a lump sum equal to  the
commuted  balance of  the remaining variable  payments due,  less any applicable
withdrawal charge.
    
 
INCOME PAYMENTS
PAYOUT START DATE FOR INCOME PAYMENTS
 
    The Payout Start Date is the day  that income payments will start under  the
Contract.  You may  change the Payout  Start Date  at any time  by notifying the
Company in writing of the  change at least 30  days before the scheduled  Payout
Start Date. The Payout Start Date must be (a) at least one month after the issue
date;  and (b) no later than  the day the Annuitant reaches  age 90, or the 10th
anniversary of the issue date, if later.
 
VARIABLE ACCOUNT INCOME PAYMENTS
 
    The amount of Variable Account  income payments depends upon the  investment
experience  of the Sub-accounts selected by the Owner and any premium taxes, the
age and sex of the Annuitant, and the Income Plan chosen. The Company guarantees
that the  amount of  the  income payment  will not  be  affected by  (1)  actual
mortality  experience  and  (2)  the  amount  of  the  Company's  administration
expenses.
 
    The Contracts offered by this prospectus contain income payment tables  that
provide  for different benefit payments to men and women of the same age (except
in states which require unisex annuity tables). Nevertheless, in accordance with
the U.S. Supreme Court's decision in  ARIZONA GOVERNING COMMITTEE V. NORRIS,  in
certain  employment-related situations, annuity  tables that do  not vary on the
basis of sex will be used.
 
    The total  income payments  received may  be  more or  less than  the  total
purchase  payments made because  (a) Variable Account  income payments vary with
the investment results of the underlying Funds, and (b) Annuitants may not  live
as long as, or may live longer than, expected.
 
    The Income Plan option selected will affect the dollar amount of each income
payment.  For example, if an Income Plan for a Life Income is chosen, the income
payments will be greater than  income payments under an  Income Plan for a  Life
Income with Guaranteed Payments.
 
    If the actual net investment experience of the Variable Account is less than
the  assumed investment rate, then the dollar amount of the income payments will
decrease. The dollar amount of  the income payments will  stay level if the  net
investment  experience equals the assumed investment  rate and the dollar amount
of the income payments  will increase if the  net investment experience  exceeds
the  assumed  investment  rate.  For purposes  of  the  Variable  Account income
payments,  the  assumed  investment  rate  is  3  percent.  For  more   detailed
information  as to how  Variable Account income payments  are determined see the
Statement of Additional Information.
 
FIXED AMOUNT INCOME PAYMENTS
 
    Income payment amounts derived from any monies allocated to Sub-accounts  of
the  Fixed Account during the  accumulation phase are fixed  for the duration of
the Income  Plan.  The fixed  amount  income  payment amount  is  calculated  by
applying  the portion of the  Contract Value in the  Fixed Account on the Payout
Start Date, adjusted  by any  Market Value  Adjustment and  less any  applicable
premium  tax, to the  greater of the  appropriate value from  the income payment
table selected or such other value as we are offering at that time.
 
INCOME PLANS
 
    The Income Plans include:
 
    INCOME PLAN 1 -- LIFE INCOME WITH GUARANTEED PAYMENTS
 
    The Company will make payments  for as long as  the Annuitant lives. If  the
Annuitant dies before the selected number of guaranteed payments have been made,
the Company will continue to pay the remainder of the guaranteed payments.
 
    INCOME PLAN 2 -- JOINT AND SURVIVOR LIFE INCOME WITH GUARANTEED PAYMENTS
 
    The  Company will make payments for as long as either the Annuitant or Joint
Annuitant, named at the time  of Income Plan selection,  is living. If both  the
Annuitant  and the Joint Annuitant die  before the selected number of guaranteed
payments have been made, the Company will  continue to pay the remainder of  the
guaranteed payments.
 
                                       14
<PAGE>
    INCOME PLAN 3 -- GUARANTEED NUMBER OF PAYMENTS
 
    The Company will make payments for a specified number of months beginning on
the Payout Start Date. These payments do not depend on the Annuitant's life. The
number  of months guaranteed  may be from  60 to 360.  The mortality and expense
risk charge  will be  deducted  from Variable  Account assets  supporting  these
payments even though the Company does not bear any mortality risk.
 
    The  Owner may change the Income Plan  until 30 days before the Payout Start
Date. If  an Income  Plan is  chosen which  depends on  the Annuitant  or  Joint
Annuitant's  life, proof of  age will be required  before income payments begin.
Applicable premium taxes will be assessed.
 
    In the event  that an Income  Plan is  not selected, the  Company will  make
income  payments in accordance  with Income Plan 1  with Guaranteed Payments for
120 Months. At  the Company's discretion,  other Income Plans  may be  available
upon  request. The Company currently  uses sex-distinct annuity tables. However,
if legislation is  passed by Congress  or the states,  the Company reserves  the
right to use income payment tables which do not distinguish on the basis of sex.
Special rules and limitations may apply to certain qualified contracts.
 
    If  the Contract Value to be applied to  an Income Plan is less than $2,000,
or if the monthly payments determined under  the Income Plan are less than  $20,
the  Company may pay the Contract Value  adjusted by any Market Value Adjustment
and less any applicable taxes, in a lump sum or change the payment frequency  to
an interval which results in income payments of at least $20.
 
                                 DEATH BENEFITS
 
DISTRIBUTION UPON DEATH PAYMENT PROVISIONS
 
    A  distribution upon death  may be paid to  the Owner determined immediately
after the death if, prior to the Payout Start Date:
 
    - any Owner dies; or
 
    - the Annuitant dies and the Owner is not a natural person.
 
    If the Owner eligible to receive a distribution upon death is not a  natural
person,  then the Owner may elect to  receive the distribution upon death in one
or more distributions. Otherwise,  if the Owner is  a natural person, the  Owner
may  elect to receive a distribution upon  death in one or more distributions or
periodic payments through an Income Plan.
 
    A death benefit will be  paid: 1) if the Owner  elects to receive the  death
benefit  in a single payment  distributed within 180 days  of the date of death;
and 2) if the death benefit is paid as of the day the value of the death benefit
is determined.  Otherwise, the  settlement value  will be  paid. The  settlement
value  is the same amount that  would be paid in the  event of withdrawal of the
Contract Value. The Company  will calculate the settlement  value at the end  of
the Valuation Period coinciding with the requested distribution date for payment
or on the mandatory distribution date of 5 years after the date of death. In any
event,  the entire distribution upon death must be distributed within five years
after the date of death unless an Income Plan is selected or a surviving  spouse
continues the Contract in accordance with the following sections:
 
    Payments  from the  Income Plan must  begin within  one year of  the date of
death and must be payable throughout:
 
    - the life of the Owner; or
 
    - a period not to exceed the life expectancy of the Owner; or
 
    - the life of the Owner with payments guaranteed for a period not to  exceed
      the life expectancy of the Owner.
 
    If  the surviving spouse  of the deceased  Owner is the  new Owner, then the
spouse may elect one of the options listed above or may continue the Contract in
the accumulation phase as if the death  had not occurred. The Company will  only
permit  the Contract to be  continued once. If the  Contract is continued in the
accumulation phase, the  surviving spouse may  make a single  withdrawal of  any
amount  within one  year of  the date  of death  without incurring  a withdrawal
charge. However, any applicable  Market Value Adjustment,  determined as of  the
date of the withdrawal, will apply.
 
DEATH BENEFIT AMOUNT
 
    Prior  to the Payout Start Date, the  death benefit is equal to the greatest
of:
 
    (a)  the Contract  Value  on  the  date the  Company  determines  the  death
         benefit; or
 
    (b)  the  amount  that  would have  been  payable  in the  event  of  a full
         withdrawal of the Contract Value on the date the Company determines the
         death benefit; or
 
    (c)  the  Contract  Value  on  the  Death  Benefit  Anniversary  immediately
         preceding the date the Company determines the death benefit adjusted by
         any  purchase payments, withdrawals and charges made between such Death
         Benefit Anniversary  and  the date  the  Company determines  the  death
         benefit.   A  Death  Benefit  Anniversary  is  every  seventh  Contract
         Anniversary beginning with the issue date. For example, the issue date,
         7th and 14th Contract Anniversaries  are the first three Death  Benefit
         Anniversaries.
 
                                       15
<PAGE>
    In  addition to the above options, upon  purchase of the Contract, the Owner
can select one of the following enhanced death benefit options:
 
    (A)  the greatest of the anniversary values as of the date we determine  the
         death  benefit. The anniversary value is equal to the Contract Value on
         a Contract Anniversary, increased by purchase payments made since  that
         anniversary  and reduced by the amount of any partial withdrawals since
         that anniversary.  Anniversary  values  will  be  calculated  for  each
         Contract Anniversary prior to the earlier of: (i) the date we determine
         the  death benefit, or (ii)  the deceased's attained age  75 or 5 years
         after the date the Contract was established, if later; or
 
    (B)  total purchase payments minus the sum of all partial withdrawals.  Each
         purchase  payment and each partial  withdrawal will accumulate daily at
         rate equivalent to 5% per  year until the earlier  of: (i) the date  we
         determine  the  death  benefit, or  (ii)  the  first day  of  the month
         following the deceased's 75th birthday or 5 years after the issue date,
         if later.
 
    If neither option is selected by the Owner, the Contract will  automatically
include option (A).
 
    The  value  of  the death  benefit  will be  determined  at the  end  of the
Valuation Period  during  which the  Company  receives a  complete  request  for
payment of the death benefit, which includes due proof of death.
 
    The  Company will not settle any death  claim until it receives due proof of
death.
 
                          CHARGES AND OTHER DEDUCTIONS
 
DEDUCTIONS FROM PURCHASE PAYMENTS
 
    No deductions are made from purchase payments. Therefore, the full amount of
every purchase payment is invested in the Investment Alternative(s).
 
WITHDRAWAL CHARGE (CONTINGENT DEFERRED SALES CHARGE)
 
    You may withdraw the Contract Value at  any time before the earliest of  the
Payout  Start Date, the  death of any  Owner or, if  the Owner is  not a natural
person, the death of the Annuitant.
 
    There are no withdrawal charges on amounts withdrawn up to 10% of the amount
of purchase payments. Amounts withdrawn  in excess of this  may be subject to  a
withdrawal  charge. Amounts not subject to a withdrawal charge and not withdrawn
in a Contract  Year are  not carried over  to later  Contract Years.  Withdrawal
charges, if applicable, will be deducted from the amount paid.
 
   
    Free  withdrawals and other partial withdrawals will be allocated on a first
in, first out basis to purchase payments. For purposes of calculating the amount
of the withdrawal charge, withdrawals are assumed to come from purchase payments
first, beginning with the  oldest payment. Withdrawals  made after all  purchase
payments  have been withdrawn, will  not be subject to  a withdrawal charge. For
partial withdrawals, the Contract Value will  be adjusted to reflect the  amount
of  payment received by  the Owner, any withdrawal  charge, any applicable taxes
and any Market Value Adjustment.
    
 
    Withdrawals in excess  of the free  withdrawal amount will  be subject to  a
withdrawal charge as set forth below:
 
<TABLE>
<CAPTION>
                                   COMPLETE YEARS SINCE
                                  PURCHASE PAYMENT BEING                                     APPLICABLE WITHDRAWAL
                                    WITHDRAWN WAS MADE                                         CHARGE PERCENTAGE
- -------------------------------------------------------------------------------------------  ---------------------
<S>                                                                                          <C>
0 YEARS....................................................................................               6%
1 YEAR.....................................................................................               6%
2 YEARS....................................................................................               5%
3 YEARS....................................................................................               5%
4 YEARS....................................................................................               4%
5 YEARS....................................................................................               4%
6 YEARS....................................................................................               3%
7 YEARS OR MORE............................................................................               0%
</TABLE>
 
    Withdrawal  charges  will  be  used  to  pay  sales  commissions  and  other
promotional or  distribution  expenses  associated with  the  marketing  of  the
Contracts.  The Company  does not  anticipate that  the withdrawal  charges will
cover all distribution expenses in connection with the Contract.
 
   
    In addition, federal and  state income tax may  be withheld from  withdrawal
amounts.  Certain terminations may also be subject to a federal tax penalty. See
"Federal Tax Matters," page 19.
    
 
    The Company reserves the right to  waive the withdrawal charge with  respect
to   Contracts  issued  to  employees  and  registered  representatives  of  any
broker-dealer that  has  entered  into  a sales  agreement  with  Allstate  Life
Financial  Services, Inc. ("ALFS") to sell the Contracts and all wholesalers and
their employees that are under agreement with ALFS to wholesale the Contract. In
addition, the Company
 
                                       16
<PAGE>
will waive any withdrawal charge prior to  the Payout Start Date if at least  30
days  after the  Contract Date  any Owner (or  Annuitant if  the Owner  is not a
natural person) is first confined to a  long term care facility or hospital  for
at  least 90 consecutive days,  confinement is prescribed by  a physician and is
medically necessary, and the request for a withdrawal and adequate written proof
of confinement are received  by us no  later than 90  days after discharge.  The
withdrawal  charge  will also  be  waived on  withdrawals  taken to  satisfy IRS
required minimum distribution rules for this Contract.
 
CONTRACT MAINTENANCE CHARGE
 
    A contract maintenance charge is  deducted annually from the Contract  Value
to  reimburse the Company for its actual  costs in maintaining each Contract and
the Variable Account. The Company guarantees that the amount of this charge will
not exceed $35 per Contract Year over the life of the Contract. This charge will
be waived if  the total  purchase payments  are $50,000  or more  on a  Contract
Anniversary  or if all money  is allocated to the  Fixed Account on the Contract
Anniversary.
 
    Maintenance costs  include  but are  not  limited to  expenses  incurred  in
billing  and  collecting purchase  payments;  keeping records;  processing death
claims, cash  withdrawals, and  policy  changes; proxy  statements;  calculating
Accumulation  Unit and  Annuity Unit values;  and issuing reports  to Owners and
regulatory agencies. The Company does not  expect to realize a profit from  this
charge.
 
    On  each Contract Anniversary  prior to the payout  start date, the contract
maintenance charge will be deducted from Sub-accounts of the Variable Account in
the same proportion that the Owner's value  in each bears to the total value  in
all  Sub-accounts of the  Variable Account. After  the Payout Start  Date, a pro
rata share of the annual contract maintenance charge will be deducted from  each
income  payment. For  example, 1/12 of  the $35,  or $2.92, will  be deducted if
there are  twelve income  payments during  the Contract  Year. A  full  contract
maintenance  charge will be deducted  if the Contract is  terminated on any date
other than a Contract Anniversary.
 
ADMINISTRATIVE EXPENSE CHARGE
 
    The Company will deduct an administrative expense charge which is equal,  on
an  annual basis,  to .10%  of the daily  net assets  you have  allocated to the
Sub-accounts of the Variable  Account. This charge is  designed to cover  actual
administrative  expenses which exceed the revenues from the contract maintenance
charge. The Company  does not  intend to profit  from this  charge. The  Company
believes  that the administrative expense charge and contract maintenance charge
have been  set at  a level  that  will recover  no more  than the  actual  costs
associated  with administering the Contracts. There is no necessary relationship
between the amount of administrative charge imposed on a given Contract and  the
amount of expenses that may be attributable to that Contract.
 
MORTALITY AND EXPENSE RISK CHARGE
 
    The  Company will deduct a mortality and expense risk charge which is equal,
on an annual basis, to 1.35% of the  daily net assets you have allocated to  the
Sub-accounts  of  the  Variable  Account. The  Company  estimates  that  .95% is
attributable to the assumption  of mortality risks and  .40% is attributable  to
the  assumption of expense risks. The Company guarantees that the amount of this
charge will not increase over the life of the Contract.
 
    The mortality risk arises  from the Company's guarantee  to cover all  death
benefits and to make income payments in accordance with the Income Plan selected
and the Income Payment Tables.
 
    The  expense risk arises from the  possibility that the contract maintenance
and administrative expense charge, both of which are guaranteed not to increase,
will be insufficient to cover actual administrative expenses.
 
    If the  mortality and  expense  risk charge  is  insufficient to  cover  the
Company's  mortality costs and excess expenses,  the Company will bear the loss.
If the charge is more  than sufficient, the Company  will retain the balance  as
profit.  The  Company currently  expects  a profit  from  this charge.  Any such
profit, as well  as any other  profit realized by  the Company and  held in  its
general  account (which  supports insurance  and annuity  obligations), would be
available for  any proper  corporate  purpose, including,  but not  limited  to,
payment of distribution expenses.
 
TAXES
 
    The  Company will  deduct applicable  state premium  taxes or  other similar
policyholder taxes  relative  to  the  Contract  (collectively  referred  to  as
"premium  taxes") either at  the Payout Start  Date, or when  a total withdrawal
occurs. Current premium tax rates range from 0 to 3.5%. The Company reserves the
right to deduct premium taxes from the purchase payments.
 
    At the Payout Start Date, the charge for premium taxes will be deducted from
each Investment Alternative  in the  proportion that  the Owner's  value in  the
Investment Alternative bears to the total Contract Value.
 
TRANSFER CHARGES
 
    The  Company reserves the right  to assess a $10  charge on each transfer in
excess of  twelve per  Contract Year,  excluding transfers  through Dollar  Cost
Averaging  and Automatic Fund Rebalancing. The Company is presently waiving this
charge.
 
                                       17
<PAGE>
FUND EXPENSES
 
    A complete description  of the  expenses and  deductions from  the Funds  is
found  in the prospectus for the Fund  Series. This prospectus is accompanied by
the prospectus for the Fund Series.
 
                                GENERAL MATTERS
 
OWNER
 
    The Owner has the sole right to exercise all rights and privileges under the
Contract, except as otherwise provided in  the Contract. The Contract cannot  be
jointly owned by both a non-natural person and a natural person.
 
BENEFICIARY
 
    Subject  to the terms of any  irrevocable Beneficiary designation, the Owner
may change the Beneficiary at any time by notifying the Company in writing.  Any
change  will be effective at the time it  is signed by the Owner, whether or not
the Annuitant is living when the change is received by the Company. The  Company
will  not, however,  be liable  as to  any payment  or settlement  made prior to
receiving the written notice.
 
    Unless otherwise provided in the  Beneficiary designation, if a  Beneficiary
predeceases  the Owner and  there are no other  surviving beneficiaries, the new
Beneficiary will  be:  the Owner's  spouse  if living;  otherwise,  the  Owner's
children,   equally,  if   living;  otherwise,  the   Owner's  estate.  Multiple
Beneficiaries may  be  named.  Unless  otherwise  provided  in  the  Beneficiary
designation,  if more  than one  Beneficiary survives  the Owner,  the surviving
Beneficiaries will share equally in any amounts due.
 
ASSIGNMENTS
 
    The Company will not  honor an assignment  of an interest  in a Contract  as
collateral  or security  for a  loan. Otherwise,  the Owner  may assign benefits
under the Contract  prior to the  Payout Start Date.  No Beneficiary may  assign
benefits  under the  Contract until  they are due.  No assignment  will bind the
Company unless it is signed by the Owner and filed with the Company. The Company
is not responsible for the validity  of an assignment. Federal law prohibits  or
restricts  the assignment of  benefits under many types  of retirement plans and
the terms of such plans may themselves contain restrictions on assignments.
 
DELAY OF PAYMENTS
 
    Payment of any amounts due from the Variable Account under the Contract will
occur within seven days, unless:
 
    1.  The New York Stock Exchange  is closed for other than usual weekends  or
       holidays, or trading on the Exchange is otherwise restricted;
 
    2.    An  emergency  exists  as  defined  by  the  Securities  and  Exchange
       Commission; or
 
    3.  The Securities and Exchange Commission permits delay for the  protection
       of the Owners.
 
    Payments  or transfers  from the Fixed  Account may  be delayed for  up to 6
months.
 
MODIFICATION
 
    The Company may  not modify the  Contract without the  consent of the  Owner
except  to make the Contract meet the requirements of the Investment Company Act
of 1940, or to make the Contract comply with any changes in the Internal Revenue
Code or to make any changes required by the Code or by any other applicable law.
 
CUSTOMER INQUIRIES
 
    The Owner  or any  persons interested  in the  Contract may  make  inquiries
regarding  the Contract by calling or writing your representative or the Company
at:
 
                       GLENBROOK LIFE AND ANNUITY COMPANY
                             POST OFFICE BOX 94039
                         PALATINE, ILLINOIS 60094-4039
                                1-(800) 776-6978
 
                                       18
<PAGE>
                              FEDERAL TAX MATTERS
 
INTRODUCTION
 
    THE FOLLOWING DISCUSSION IS GENERAL AND  IS NOT INTENDED AS TAX ADVICE.  THE
COMPANY  MAKES  NO GUARANTEE  REGARDING  THE TAX  TREATMENT  OF ANY  CONTRACT OR
TRANSACTION  INVOLVING  A  CONTRACT.  Federal,   state,  local  and  other   tax
consequences  of ownership or receipt of distributions under an annuity contract
depend on the  individual circumstances  of each  person. If  you are  concerned
about  any tax  consequences with regard  to your  individual circumstances, you
should consult a competent tax adviser.
 
TAXATION OF ANNUITIES IN GENERAL
 
TAX DEFERRAL
 
    Generally, an  annuity contract  owner  is not  taxed  on increases  in  the
Contract Value until a distribution occurs. This rule applies only where (1) the
owner  is a  natural person,  (2) the  investments of  the Variable  Account are
"adequately diversified" in accordance with Treasury Department Regulations, and
(3) the issuing insurance company, instead  of the annuity owner, is  considered
the owner for federal income tax purposes of any separate account assets funding
the contract.
 
NON-NATURAL OWNERS
 
    As  a general rule,  annuity contracts owned by  non-natural persons such as
corporations, trusts, or other entities are not treated as annuity contracts for
federal income  tax  purposes and  the  income on  such  contracts is  taxed  as
ordinary  income received or accrued by the owner during the taxable year. There
are several exceptions to  the general rule for  contracts owned by  non-natural
persons which are discussed in the Statement of Additional Information.
 
DIVERSIFICATION REQUIREMENTS
 
    For  a Contract to be treated as an annuity for federal income tax purposes,
the investments  in the  Variable Account  must be  "adequately diversified"  in
accordance  with  the standards  provided in  the  Treasury regulations.  If the
investments in the  Variable Account  are not adequately  diversified, then  the
Contract  will not  be treated  as an  annuity contract  for federal  income tax
purposes and the Owner will  be taxed on the excess  of the Contract Value  over
the  investment in the Contract. Although the Company does not have control over
the Funds  or their  investments, the  Company  expects the  Funds to  meet  the
diversification requirements.
 
OWNERSHIP TREATMENT
 
    In  connection  with  the  issuance  of  the  regulations  on  the  adequate
diversification standards, the  Department of  the Treasury  announced that  the
regulations  do not  provide guidance  concerning the  extent to  which contract
owners may direct their  investments among Sub-accounts  of a variable  account.
The  Internal Revenue Service has previously  stated in published rulings that a
variable contract owner will be considered the owner of separate account  assets
if  the  owner possesses  incidents of  ownership  in those  assets such  as the
ability to  exercise  investment  control  over the  assets.  At  the  time  the
diversification  regulations were issued, Treasury announced that guidance would
be issued in  the future  regarding the extent  that owners  could direct  their
investments among Sub-accounts without being treated as owners of the underlying
assets  of the  Variable Account.  As of  the date  of this  prospectus, no such
guidance has been issued.
 
    The ownership rights under  this contract are similar  to, but different  in
certain respects from, those described by the Service in rulings in which it was
determined  that contract owners were not owners of separate account assets. For
example, the owner of this contract has the choice of more investment options to
which to allocate  premiums and  contract values, and  may be  able to  transfer
among investment options more frequently than in such rulings. These differences
could  result in the contract owner being treated  as the owner of the assets of
the Variable Account. In those circumstances, income and gains from the Variable
Account assets would  be includible  in the  Contract Owners'  gross income.  In
addition,  the Company  does not know  what standards  will be set  forth in the
regulations or rulings which  the Treasury Department has  stated it expects  to
issue.  It is possible  that Treasury's position,  when announced, may adversely
affect the tax treatment of existing contracts. The Company, therefore, reserves
the right to modify the  Contract as necessary to  attempt to prevent the  Owner
from  being  considered the  federal tax  owner  of the  assets of  the Variable
Account. However, the Company makes no  guarantee that such modification to  the
contract will be successful.
 
DELAYED MATURITY DATES
 
    If  the contract's scheduled maturity  date is at a  time when the annuitant
has reached an advanced age, e.g., past age 85, it is possible that the contract
would not be treated as  an annuity. In that event,  the income and gains  under
the contract could be currently includible in the owner's income.
 
TAXATION OF PARTIAL AND FULL WITHDRAWALS
 
    In  the case of a partial withdrawal under a non-qualified contract, amounts
received are taxable  to the  extent the  contract value  before the  withdrawal
exceeds  the investment in the  contract. The investment in  the contract is the
gross premium  or other  consideration  paid for  the  contract reduced  by  any
amounts  previously received from  the contract to the  extent such amounts were
properly excluded  from the  owner's gross  income.  In the  case of  a  partial
withdrawal under a qualified contract, the portion of the payment that bears the
same  ratio to  the total  payment that  the investment  in the  contract (i.e.,
nondeductible IRA  contributions, after  tax contributions  to qualified  plans)
bears
 
                                       19
<PAGE>
to  the contract  value, can  be excluded  from income.  In the  case of  a full
withdrawal under a non-qualified  contract or a  qualified contract, the  amount
received  will be taxable  only to the  extent it exceeds  the investment in the
contract. If  an  individual transfers  an  annuity contract  without  full  and
adequate  consideration to a person other than  the individual's spouse (or to a
former spouse incident to a divorce), the owner will be taxed on the  difference
between  the contract value  and the investment  in the contract  at the time of
transfer. Other than  in the  case of  certain qualified  contracts, any  amount
received  as a loan under a contract, and any assignment or pledge (or agreement
to assign or pledge) of  the contract value is treated  as a withdrawal of  such
amount  or  portion.  The contract  provides  a  death benefit  that  in certain
circumstances may exceed the greater of the payments and the contract value.  As
described  elsewhere in the prospectus, the Company imposes certain charges with
respect to the death benefit. It is possible that some portion of those  charges
could  be treated  for federal  tax purposes  as a  partial withdrawal  from the
contract.
 
TAXATION OF ANNUITY PAYMENTS
 
    Generally, the rule for income taxation of payments received from an annuity
contract provides for the  return of the owner's  investment in the contract  in
equal  tax-free amounts  over the  payment period.  The balance  of each payment
received is  taxable. In  the  case of  variable  annuity payments,  the  amount
excluded  from taxable  income is determined  by dividing the  investment in the
contract by the total number of expected payments. In the case of fixed  annuity
payments,  the  amount excluded  from income  is  determined by  multiplying the
payment by the ratio of the investment in the contract (adjusted for any  refund
feature  or period certain) to the total  expected value of annuity payments for
the term  of the  contract.  Once the  total amount  of  the investment  in  the
contract  is excluded  using these  ratios, the  annuity payments  will be fully
taxable. If annuity payments cease because of the death of the annuitant  before
the total amount of the investment in the contract is recovered, the unrecovered
amount  generally will be allowed  as a deduction to  the annuitant for his last
taxable year.
 
TAXATION OF ANNUITY DEATH BENEFITS
 
    Amounts may be distributed from an annuity contract because of the death  of
an  owner  or annuitant.  Generally, such  amounts are  includible in  income as
follows: (1) if distributed  in a lump  sum, the amounts are  taxed in the  same
manner  as a full withdrawal or (2)  if distributed under an annuity option, the
amounts are taxed in the same manner as an annuity payment.
 
PENALTY TAX ON PREMATURE DISTRIBUTIONS
 
    There is  a  10%  penalty  tax  on  the  taxable  amount  of  any  premature
distribution  from a non-qualified  annuity contract. The  penalty tax generally
applies to  any distribution  made prior  to  the owner  attaining age  59  1/2.
However,  there should be no penalty tax  on distributions to owners (1) made on
or after the owner attains age 59 1/2; (2) made as a result of the owner's death
or disability; (3) made  in substantially equal periodic  payments over life  or
life  expectancy; (4) made under an immediate annuity; or (5) attributable to an
investment in  the contract  before August  14, 1982.  Similar rules  apply  for
distributions  under certain qualified contracts. A competent tax advisor should
be consulted to determine if any other  exceptions to the penalty apply to  your
specific circumstances.
 
AGGREGATION OF ANNUITY CONTRACTS
 
    All  non-qualified deferred annuity contracts issued  by the Company (or its
affiliates) to the same  owner during any calendar  year will be aggregated  and
treated  as one annuity contract for  purposes of determining the taxable amount
of a distribution.
 
TAX QUALIFIED CONTRACTS
 
    Annuity contracts  may be  used as  investments with  certain tax  qualified
plans  such as: (1) Individual Retirement  Annuities under Section 408(b) of the
Code; (2) Simplified Employee  Pension Plans under Section  408(k) of the  Code;
(3)  Tax Sheltered Annuities under Section 403(b) of the Code; (4) Corporate and
Self Employed  Pension  and  Profit  Sharing Plans;  and  (5)  State  and  Local
Government  and Tax-Exempt Organization Deferred Compensation Plans. In the case
of certain tax qualified plans, the terms  of the plans may govern the right  to
benefits, regardless of the terms of the contract.
 
RESTRICTIONS UNDER SECTION 403(B) PLANS
 
    Section  403(b)  of the  Code provides  for tax-deferred  retirement savings
plans for  employees of  certain non-profit  and educational  organizations.  In
accordance  with the requirements  of Section 403(b),  any annuity contract used
for a  403(b)  plan  must  provide that  distributions  attributable  to  salary
reduction  contributions  made  after  12/31/88,  and  all  earnings  on  salary
reduction contributions, may be made only after the employee attains age 59 1/2,
separates from  service,  dies,  becomes  disabled or  on  account  of  hardship
(earnings  on  salary  reduction contributions  may  not be  distributed  on the
account of hardship). These  limitations do not apply  to withdrawals where  the
Company  is directed to  transfer some or  all of the  contract value to another
Section 403(b) plans.
 
INCOME TAX WITHHOLDING
 
    The Company is required to withhold federal  income tax at a rate of 20%  on
all  "eligible rollover  distributions" unless  an individual  elects to  make a
"direct rollover"  of  such amounts  to  another qualified  plan  or  Individual
Retirement  Account or Annuity (IRA).  Eligible rollover distributions generally
include all distributions  from qualified  contracts, excluding  IRAs, with  the
exception   of  (1)  required   minimum  distributions,  or   (2)  a  series  of
substantially equal periodic payments made over  a period of at least 10  years,
or the life (joint
 
                                       20
<PAGE>
lives)  of  the  participant  (and  beneficiary).  For  any  distributions  from
non-qualified annuity contracts, or distributions from qualified contracts which
are not considered eligible rollover distributions, the Company may be  required
to  withhold federal and state  income taxes unless the  recipient elects not to
have taxes withheld and properly notifies the Company of such election.
 
                         DISTRIBUTION OF THE CONTRACTS
 
   
    Allstate  Life  Financial  Services,  Inc.  ("ALFS"),  3100  Sanders   Road,
Northbrook  Illinois,  a  wholly  owned subsidiary  of  Allstate  Life Insurance
Company, acts as the principal underwriter of the Contracts. ALFS is  registered
as a broker-dealer under the Securities Exchange Act of 1934 and became a member
of  the  National Association  of  Securities Dealers,  Inc.  on June  30, 1993.
Contracts are  sold  by registered  representatives  of broker-dealers  or  bank
employees  who are  licensed insurance agents  appointed by  the Company, either
individually or  through  an  incorporated insurance  agency.  In  some  states,
Contracts  may be  sold by  representatives or employees  of banks  which may be
acting as  broker-dealers without  separate  registration under  the  Securities
Exchange Act of 1934, pursuant to legal and regulatory exceptions.
    
 
    Commissions  paid may vary,  but in aggregate are  not anticipated to exceed
6.75% of any purchase payment. In addition, under certain circumstances, certain
sellers of the Contracts  may be paid persistency  bonuses which will take  into
account, among other things, the length of time purchase payments have been held
under  a Contract, and Contract  Values. A persistency bonus  is not expected to
exceed 1.20%,  on  an  annual  basis,  of  the  Contract  Values  considered  in
connection  with the bonus. These commissions are intended to cover distribution
expenses.
 
    The underwriting agreement with ALFS provides for indemnification of ALFS by
the Company  for  liability  to  Owners arising  out  of  services  rendered  or
Contracts issued.
 
                                 VOTING RIGHTS
 
    The  Owner  or anyone  with  a voting  interest  in the  Sub-account  of the
Variable Account may instruct the Company on how to vote at shareholder meetings
of the Fund Series. The Company will solicit and cast each vote according to the
procedures set up  by the Fund  Series and to  the extent required  by law.  The
Company  reserves the  right to vote  the eligible  shares in its  own right, if
subsequently permitted by the Investment Company Act of 1940, its regulations or
interpretations thereof.
 
    Fund shares as to which no timely instructions are received will be voted in
proportion to the  voting instructions which  are received with  respect to  all
Contracts  participating in that Sub-account.  Voting instructions to abstain on
any item to  be voted upon  will be applied  on a pro-rata  basis to reduce  the
votes eligible to be cast.
 
    Before  the Payout Start  Date, the Owner  holds the voting  interest in the
Sub-account of the Variable Account (The number  of votes for the Owner will  be
determined  by dividing the Contract Value  attributable to a Sub-account by the
net asset value per share of the applicable eligible Fund.)
 
    After the Payout Start  Date, the person receiving  income payments has  the
voting  interest.  After the  Payout Start  Date, the  votes decrease  as income
payments are made and as the  reserves for the Contract decrease. That  person's
number  of votes will  be determined by  dividing the reserve  for such Contract
allocated to the applicable Sub-account by the net asset value per share of  the
corresponding eligible Fund.
 
                            SELECTED FINANCIAL DATA
 
   
    The  following selected  financial data  for the  Company should  be read in
conjunction with the  1995 financial  statements and notes  thereto included  in
this Prospectus beginning on page F-1 and the 1994 and 1993 financial statements
and notes thereto incorporated by reference in this prospectus.
    
 
                       GLENBROOK LIFE AND ANNUITY COMPANY
                            SELECTED FINANCIAL DATA
                                 (IN THOUSANDS)
 
   
<TABLE>
<CAPTION>
YEAR-END FINANCIAL DATA                                                                     1995       1994       1993
- ---------------------------------------------------------------------------------------  ----------  ---------  ---------
<S>                                                                                      <C>         <C>        <C>
For The Years Ended December 31:
  Income Before Taxes..................................................................  $    4,455  $   2,017  $     836
  Net Income...........................................................................       2,879      1,294        529
As of December 31:
    Total Assets(1)....................................................................   1,409,705    750,245    169,361
</TABLE>
    
 
- ------------
 
   
(1)  The Company  adopted SFAS No.  115, "Accounting for  Certain Investments in
    Debt and  Equity  Securities"  on December  31,  1993.  See Note  3  to  the
    Financial Statements.
    
 
                                       21
<PAGE>
   
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
    
 
   
GENERAL
    
 
   
    The   following  highlights  significant   factors  influencing  results  of
operations and financial position.
    
 
   
    Glenbrook Life and Annuity Company ("the Company"), which is wholly owned by
Allstate Life  Insurance Company  ("Allstate Life"),  currently issues  flexible
premium  fixed  annuities,  and  beginning in  1995,  flexible  premium deferred
variable annuity contracts  through its Separate  Accounts. The Company  markets
its products through banks and other financial institutions.
    
 
   
    The  Company reinsures all  of its annuity deposits  with Allstate Life, and
all life insurance in  force with other  reinsurers. Accordingly, the  financial
results  reflected in the Company's statements  of operations relate only to the
investment of those assets of the  Company that are not transferred to  Allstate
Life or other reinsurers under the reinsurance treaties.
    
 
   
    Separate  Account assets and liabilities  are legally segregated and carried
at fair value  in the  statements of  financial position.  The Separate  Account
investment  portfolios  were  initially funded  with  a $10  million  seed money
contribution from the Company in 1995. Investment income and realized gains  and
losses  of the Separate  Account investments, other than  the portion related to
the Company's  participation, accrue  directly to  the contractholders  (net  of
fees)   and,  therefore,  are  not  included  in  the  Company's  statements  of
operations.
    
 
   
RESULTS OF OPERATIONS
    
 
   
<TABLE>
<CAPTION>
                                                                                               1995       1994       1993
                                                                                             ---------  ---------  ---------
                                                                                                     $ IN THOUSANDS
<S>                                                                                          <C>        <C>        <C>
Net investment income......................................................................  $   3,996  $   2,017  $     753
                                                                                             ---------  ---------  ---------
Realized capital gains (losses), after tax.................................................  $     298  $  --      $      54
                                                                                             ---------  ---------  ---------
Net income.................................................................................  $   2,879  $   1,294  $     529
                                                                                             ---------  ---------  ---------
Fixed income securities, at amortized cost.................................................  $  44,112  $  51,527  $   9,543
                                                                                             ---------  ---------  ---------
</TABLE>
    
 
   
    Net investment income increased  $2.0 million in 1995,  and $1.3 million  in
1994.  In both years, the  increases were attributable to  an increased level of
investments, including  the Company's  participation  in the  Separate  Accounts
during  1995, and a $40 million capital contribution received from Allstate Life
in the third  quarter of 1994.  Net income  increases of $1.6  million and  $0.8
million reflect the change in net investment income in both years.
    
 
   
    Realized  capital gains after tax of $0.3 million in 1995 were the result of
sales of  investments  to  fund  the Company's  participation  in  the  Separate
Accounts.
    
 
   
FINANCIAL POSITION
    
 
   
<TABLE>
<CAPTION>
                                                                                                      1995       1994
                                                                                                   ----------  ---------
                                                                                                      $ IN THOUSANDS
<S>                                                                                                <C>         <C>
Fixed income securities, at fair value...........................................................  $   48,815  $  49,807
                                                                                                   ----------  ---------
Unrealized net capital gains (losses) (1)........................................................  $    5,164  $  (1,720)
                                                                                                   ----------  ---------
Separate Account assets, at fair value...........................................................  $   15,578  $  --
                                                                                                   ----------  ---------
Contractholder funds.............................................................................  $1,340,925  $ 696,854
                                                                                                   ----------  ---------
Reinsurance recoverable from Allstate Life.......................................................  $1,340,925  $ 696,854
                                                                                                   ----------  ---------
</TABLE>
    
 
- -----------------
   
(1)  Unrealized net capital gains (losses) exclude the effect of deferred income
    taxes.
    
 
   
    Fixed income securities are classified as available for sale and carried  in
the  statements  of  financial  position at  fair  value.  Although  the Company
generally intends to hold  its fixed income securities  for the long-term,  such
classification  affords  the Company  flexibility in  managing the  portfolio in
response to changes in market conditions.
    
 
   
    At December 31, 1995 unrealized capital gains were $5.2 million compared  to
unrealized  capital losses of $1.7 million at December 31, 1994. The significant
change in the unrealized capital gain/loss position is primarily attributable to
declining interest rates.
    
 
   
    At December 31, 1995 both contractholder funds and amounts recoverable  from
Allstate  Life under reinsurance  treaties reflect an  increase of $644 million.
These increases result from sales of  the Company's single and flexible  premium
deferred  annuities partially offset by surrenders. Reinsurance recoverable from
Allstate Life relates to policy benefit obligations ceded to Allstate Life.
    
 
                                       22
<PAGE>
   
    The Company's participation  in the  Separate Accounts of  $10.5 million  at
December  31, 1995 is  included in the Separate  Accounts assets. Unrealized net
capital gains arising from the Company's participation in the Separate  Accounts
was $0.3 million, net of tax, at December 31, 1995.
    
 
   
LIQUIDITY AND CAPITAL RESOURCES
    
 
   
    Allstate  Life made a $40 million capital contribution to the Company in the
third quarter of 1994.
    
 
   
    Under the  terms  of  intercompany reinsurance  agreements,  assets  of  the
Company  that relate to  insurance in force,  excluding Separate Account assets,
are transferred to Allstate  Life or other  reinsurers, who maintain  investment
portfolios which support the Company's products.
    
 
                                  COMPETITION
 
   
    The  Company is engaged in a business  that is highly competitive because of
the large number of stock and mutual life insurance companies and other entities
competing in the sale of insurance and annuities. There are approximately  2,000
stock,  mutual and  other types  of insurers in  business in  the United States.
Several  independent   rating  agencies   regularly  evaluate   life   insurer's
claims-paying  ability, quality of investments  and overall stability. A.M. Best
Company assigns A+ (Superior) to Allstate Life which automatically reinsures all
net business of  the Company.  A.M. Best Company  also assigns  the Company  the
rating  of A+(r) because  the Company automatically  reinsures all business with
Allstate  Life.  Standard  &  Poor's  Insurance  Rating  Services  assigns   AA+
(Excellent)  to the Company's  claims-paying ability and  Moody's assigns an Aa3
(Excellent) financial stability rating  to the Company.  The Company shares  the
same  ratings of its  parent, Allstate Life Insurance  Company. These ratings do
not relate to the investment performance of the Variable Account.
    
 
                                   EMPLOYEES
 
   
    As  of  December  31,   1995,  Glenbrook  Life   and  Annuity  Company   has
approximately 43 employees at its Home Office in Northbrook, Illinois.
    
 
                                   PROPERTIES
 
    The  Company occupies office space provided by its parent, Allstate Life, in
Northbrook, Illinois. Expenses associated with these offices are allocated on  a
direct and indirect basis to the Company.
 
                          STATE AND FEDERAL REGULATION
 
    The  insurance  business  of the  Company  is subject  to  comprehensive and
detailed regulation and supervision  throughout the United  States. The laws  of
the   various   jurisdictions   establish   supervisory   agencies   with  broad
administrative powers with respect to licensing to transact business, overseeing
trade practices, licensing agents, approving policy forms, establishing  reserve
requirements,  fixing maximum interest rates on  life insurance policy loans and
minimum rates for  accumulation of  surrender values, prescribing  the form  and
content  of required financial statements and regulating the type and amounts of
investments permitted.  Each  insurance company  is  required to  file  detailed
annual  reports with supervisory agencies in  each of the jurisdictions in which
it does business and its operations  and accounts are subject to examination  by
such agencies at regular intervals.
 
    Under  insurance guaranty fund law, in  most states, insurers doing business
therein can  be assessed  up  to prescribed  limits  for contract  owner  losses
incurred  as  a  result  of  company  insolvencies.  The  amount  of  any future
assessments on the Company under these laws cannot be reasonably estimated. Most
of these laws do provide, however, that an assessment may be excused or deferred
if it would threaten an insurer's own financial strength.
 
    In addition, several states, including Illinois, regulate affiliated  groups
of  insurers, such  as the Company  and its affiliates,  under insurance holding
company legislation.  Under  such laws,  intercompany  transfers of  assets  and
dividend  payments from insurance subsidiaries may be subject to prior notice or
approval, depending on the  size of such transfers  and payments in relation  to
the financial positions of the companies.
 
    Although  the federal  government generally  does not  directly regulate the
business of insurance, federal initiatives often have an impact on the  business
in  a  variety  of  ways.  Current  and  proposed  federal  measures  which  may
significantly affect the insurance business include employee benefit regulation,
controls on  medical  care costs,  removal  of barriers  preventing  banks  from
engaging in the securities and insurance business, tax law changes affecting the
taxation of insurance companies, the tax treatment of insurance products and its
impact on the relative desirability of various personal investment vehicles, and
proposed  legislation to prohibit the use of gender in determining insurance and
pension rates and benefits.
 
                                       23
<PAGE>
                EXECUTIVE OFFICERS AND DIRECTORS OF THE COMPANY
 
   
    The directors  and  executive  officers  are  listed  below,  together  with
information  as  to  their  ages,  dates  of  election  and  principal  business
occupations during the  last five years  (if other than  their present  business
occupations).
    
 
LOUIS G. LOWER, II, 50, Chief Executive Officer (1995)* and Chairman of the
Board (1992)*
 
    He is also President and Chairman of the Board of Directors of Allstate Life
Insurance  Company, Northbrook Life Insurance  Company, Glenbrook Life Insurance
Company, The Northbrook Corporation and  Allstate Life Insurance Company of  New
York;  Chairman of the Board of Directors  and Chief Executive Officer of Surety
Life Insurance Company and Lincoln Benefit  Life Company; Chairman of the  Board
of  Directors  of  Allstate  Settlement Corporation;  Director  and  Senior Vice
President  of  Allstate  Insurance  Company;  Vice  President  of  the  Allstate
Foundation;  and Director  of Allstate  Life Financial  Services, Inc., Allstate
Indemnity Company, Allstate Property  and Casualty Insurance Company,  Deerbrook
Insurance  Company, Northbrook Indemnity  Company, Northbrook National Insurance
Company,  Northbrook   Property  and   Casualty  Insurance   Company,   Allstate
International,  Inc. and Saison  Life Insurance Company, Ltd.  Prior to 1990, he
was Executive Vice President  of Allstate Life Insurance  Company. From 1992  to
1995,  in  addition  to his  position  as Chairman  of  the Board,  he  was also
President of the Company.
 
   
MARLA G. FRIEDMAN, 42, President, Chief Operating Officer (1995)* and Director
(1992)*
    
 
    She is also Vice President and Director of Allstate Life Insurance  Company,
Northbrook  Life  Insurance Company,  Glenbrook Life  Insurance Company  and The
Northbrook Corporation;  and Director  of  Allstate Settlement  Corporation  and
Allstate Life Financial Services, Inc. Prior to 1995, she was Vice President and
Director  of Glenbrook Life and Annuity Company  and prior to 1992, she was Vice
President and Director of  Allstate Life Insurance  Company and Northbrook  Life
Insurance Company. Prior to 1995, she was also Vice President of the Company.
 
MICHAEL J. VELOTTA, 50, Vice President, Secretary, General Counsel, and Director
(1993)*
 
    He  is  also  Vice President,  Secretary,  General Counsel  and  Director of
Allstate Life Insurance  Company, Northbrook Life  Insurance Company,  Glenbrook
Life  Insurance  Company  and  Allstate  Life  Insurance  Company  of  New York;
Secretary  and  Director  of  Allstate  Settlement  Corporation,  Allstate  Life
Financial  Services, Inc. and The Northbrook Corporation; and Director of Surety
Life Insurance Company and Lincoln Benefit  Life Company. Prior to 1993, he  was
Vice President and Assistant General Counsel of Allstate Insurance Company.
 
   
PETER H. HECKMAN, 50, Vice President and Director (1992)*
    
 
    He  is also Vice President and  Director of Allstate Life Insurance Company,
Northbrook Life Insurance  Company, Glenbrook Life  Insurance Company,  Allstate
Settlement  Corporation and  Allstate Life Insurance  Company of  New York; Vice
President and Controller of The  Northbrook Corporation; and Director of  Surety
Life  Insurance Company and Lincoln Benefit Life  Company. Prior to 1992, he was
Vice President and Director of Allstate Life Insurance Company, Northbrook  Life
Insurance  Company, Glenbrook Life Insurance Company and Allstate Life Insurance
Company of New York.
 
   
G. CRAIG WHITEHEAD, 50, Senior Vice President and Director (1995)*
    
 
    He is also Assistant Vice President and Director of Glenbrook Life Insurance
Company and Assistant Vice President  of Allstate Life Insurance Company.  Prior
to  1992, he was an Assistant Vice President of Glenbrook Life Insurance Company
and Allstate Life Insurance Company and prior to 1991, he was a director in  the
strategic planning area of Allstate Insurance Company.
 
BARRY S. PAUL, 40, Assistant Vice President and Controller (1992)*
 
    He  is  also  Assistant  Vice  President  and  Controller  of  Allstate Life
Insurance Company, Northbrook  Life Insurance Company,  Allstate Life  Insurance
Company  of New York and Glenbrook Life Insurance Company. Prior to 1991, he was
Assistant Vice President  of Allstate  Life Insurance  Company, Northbrook  Life
Insurance Company and Allstate Life Insurance Company of New York.
 
   
JAMES P. ZILS, 44, Treasurer (1995)*
    
 
   
    He  is also  Treasurer of Allstate  Life Financial  Services, Inc., Allstate
Settlement Corporation, Allstate Life Insurance Company, Allstate Life Insurance
Company of New York, Northbrook Life Insurance Company, Glenbrook Life Insurance
Company, The Northbrook Corporation. He is  Treasurer and Vice President of  AEI
Group,  Inc.,  Allstate International  Inc., Allstate  Motor Club,  Inc., Direct
Marketing  Center,  Inc.,   Enterprises  Services   Corporation,  The   Allstate
Foundation,  Forestview Mortgage Insurance  Company, Allstate Indemnity Company,
Allstate Property  and Casualty,  Deerbrook Insurance  Company, First  Assurance
Company,  Northbrook Indemnity  Company, Northbrook  National Insurance Company,
Northbrook Property and Casualty  Insurance Company. Prior to  1995 he was  Vice
President  of Allstate  Life Insurance  Company. Prior  to 1993  he held various
management positons.
    
 
   
CASEY J. SYLLA, 52, Chief Investment Officer (1995)*
    
 
   
    He is  also  Director  of Allstate  Insurance  Company,  Allstate  Indemnity
Company,  Allstate Property and Casualty  Insurance Company, Deerbrook Insurance
Company, First Assurance Company, Northbrook Indemnity Company, Northbrook  Life
Insurance  Company, Northbrook  National Insurance  Company, Northbrook Property
and Casualty Insurance Company. He is also Chief Investment Officer of  Allstate
Settlement  Corporation, The Northbrook Corporation, Allstate Insurance Company,
Allstate Indemnity Company, Allstate Property and
    
 
                                       24
<PAGE>
   
Casualty, Deerbrook  Insurance  Company,  First  Assurance  Company,  Northbrook
Indemnity  Company, Northbrook  National Insurance  Company, Northbrook Property
and Casualty Insurance Company. He is also Director and Chief Investment Officer
of Allstate Life Insurance Company. Prior to 1995, he was Senior Vice  President
and  Executive  Officer  Investments  for  Northwestern  Mutual  Life  Insurance
Company.
    
 
* Date elected/appointed to current office.
 
                             EXECUTIVE COMPENSATION
 
   
    Executive officers of the  Company also serve as  officers of Allstate  Life
and receive no compensation directly from the Company. Some of the officers also
serve  as officers of  other companies affiliated  with the Company. Allocations
have been made as to each individual's time  devoted to his or her duties as  an
executive  officer of the Company.  However, no officer's compensation allocated
to the  Company  exceeded  $100,000.  The allocated  cash  compensation  of  all
officers  of the Company as  a group for services  rendered in all capacities to
the Company during 1995 totalled $5,976.86. Directors of the Company receive  no
compensation in addition to their compensation as employees of the Company.
    
 
SUMMARY COMPENSATION TABLE
(ALLSTATE LIFE INSURANCE CO.)
   
<TABLE>
<CAPTION>
                                                      ANNUAL COMPENSATION                                          LONG TERM
                                                                                                                  COMPENSATION
                                                                                                                  -----------
                                                                                                              AWARDS
                                                                                                     ------------------------
                                                                                                                      (G)
                                             -------------------------------------        (E)            (F)      SECURITIES
                                                                                     OTHER ANNUAL    RESTRICTED   UNDERLYING
                    (A)                          (B)          (C)          (D)       COMPENSATION       STOCK      OPTIONS/
NAME AND PRINCIPAL POSITION                     YEAR       SALARY($)    BONUS($)           $          AWARD(S)      SARS(#)
- -------------------------------------------      ---      -----------  -----------  ---------------  -----------  -----------
<S>                                          <C>          <C>          <C>          <C>              <C>          <C>
Louis G. Lower, II.........................        1995    $ 416,000    $ 266,175      $  17,044      $ 199,890          N/A
Chief Executive Officer and                        1994    $ 389,050    $  43,973      $  26,990      $ 170,660          N/A
Chairman of the Board of Directors                 1993    $ 374,200    $ 294,683      $  52,443      $ 318,625          N/A
 
<CAPTION>
 
                                                       PAYOUTS
                                             ----------------------------
 
                                                 (H)            (I)
                                                LTIP         ALL OTHER
                    (A)                        PAYOUTS     COMPENSATION
NAME AND PRINCIPAL POSITION                      ($)            ($)
- -------------------------------------------  -----------  ---------------
<S>                                          <C>          <C>
Louis G. Lower, II.........................   $ 411,122     $   5,250
Chief Executive Officer and                           0     $   1,890(1)
Chairman of the Board of Directors            $  13,451     $   6,296(1)
</TABLE>
    
 
- ------------
 
(1)  Amount received by  Mr. Lower which  represents the value  allocated to his
    account from employer  contributions under  The Savings  and Profit  Sharing
    Fund of Sears employees.
 
   
    Shares  of  the Company  and Allstate  Life  are not  directly owned  by any
director or officer  of the Company.  The percentage of  shares of The  Allstate
Corporation  beneficially  owned  by  any director,  and  by  all  directors and
officers of the Company  as a group,  does not exceed one  percent of the  class
outstanding.
    
 
                               LEGAL PROCEEDINGS
 
    From  time  to  time  the  Company is  involved  in  pending  and threatened
litigation in the  normal course of  its business in  which claims for  monetary
damages  are asserted. Management,  after consultation with  legal counsel, does
not anticipate the ultimate  liability arising from  such pending or  threatened
litigation to have a material effect on the financial condition of the Company.
 
                                    EXPERTS
 
   
    The  financial statements of the  Variable Account incorporated by reference
in this prospectus, the financial statements and financial statement schedule of
the Company, and the financial statements from which the Selected Financial Data
included in this prospectus have been  derived, have been audited by Deloitte  &
Touche  LLP,  Two  Prudential  Plaza,  180  North  Stetson  Avenue,  Chicago, IL
60601-6799, independent auditors,  as stated in  their reports appearing  herein
and  incorporated by reference in this  prospectus, and are included in reliance
upon the  reports  of  such  firm  given upon  their  authority  as  experts  in
accounting and auditing.
    
 
                                 LEGAL MATTERS
 
   
    Sutherland,  Asbill and Brennan  of Washington, D.C.  has provided advice on
certain legal matters relating to the federal securities laws applicable to  the
issue  and sale of the Contracts. All  matters of Illinois law pertaining to the
Contracts, including the validity  of the Contracts and  the Company's right  to
issue  such Contracts  under Illinois  insurance law,  have been  passed upon by
Michael J. Velotta, General Counsel of the Company.
    
 
                                       25
<PAGE>
   
                          INDEPENDENT AUDITORS' REPORT
    
 
   
TO THE BOARD OF DIRECTORS AND SHAREHOLDER OF
GLENBROOK LIFE AND ANNUITY COMPANY:
    
 
   
    We  have  audited  the  accompanying  Statements  of  Financial  Position of
Glenbrook Life and Annuity  Company as of  December 31, 1995  and 1994, and  the
related  Statements of Operations, Shareholder's Equity  and Cash Flows for each
of the  three years  in the  period ended  December 31,  1995. Our  audits  also
included  Schedule IV --  Reinsurance. These financial  statements and financial
statement schedule  are  the responsibility  of  the Company's  management.  Our
responsibility  is  to  express an  opinion  on these  financial  statements and
financial statement schedule 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. An audit also includes
assessing the  accounting  principles used  and  significant estimates  made  by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
    
 
   
    In our opinion, such  financial statements present  fairly, in all  material
respects,  the financial  position of Glenbrook  Life and Annuity  Company as of
December 31, 1995 and 1994, and the results of its operations and its cash flows
for each of the three years in the period ended December 31, 1995 in  conformity
with generally accepted accounting principles. Also, in our opinion, Schedule IV
- --  Reinsurance, when considered  in relation to  the basic financial statements
taken as a whole, presents fairly, in all material respects, the information set
forth therein.
    
 
   
    As discussed in  Note 3  to the financial  statements, in  1993 the  Company
changed its method of accounting for investments in fixed income securities.
    
 
   
/s/ DELOITTE & TOUCHE LLP
    
 
   
Chicago, IL
    
   
March 1, 1996
    
 
                                      F-1
<PAGE>
                       GLENBROOK LIFE AND ANNUITY COMPANY
                        STATEMENTS OF FINANCIAL POSITION
 
   
<TABLE>
<CAPTION>
                                                                                                       DECEMBER 31,
                                                                                                   ---------------------
                                                                                                      1995       1994
                                                                                                   ----------  ---------
                                                                                                     ($ IN THOUSANDS)
<S>                                                                                                <C>         <C>
Assets
  Investments
    Fixed income securities
      Available for sale, at fair value (amortized cost $44,112 and $51,527).....................  $   48,815  $  49,807
    Short-term...................................................................................       2,102        924
                                                                                                   ----------  ---------
        Total investments........................................................................      50,917     50,731
  Reinsurance recoverable from Allstate Life Insurance Company...................................   1,340,925    696,854
  Cash...........................................................................................         264
  Deferred income taxes..........................................................................                    542
  Other assets...................................................................................       2,021      2,118
  Separate Accounts..............................................................................      15,578
                                                                                                   ----------  ---------
        Total assets.............................................................................  $1,409,705  $ 750,245
                                                                                                   ----------  ---------
                                                                                                   ----------  ---------
Liabilities
  Contractholder funds...........................................................................  $1,340,925  $ 696,854
  Income taxes payable...........................................................................       1,637        605
  Deferred income taxes..........................................................................       1,828
  Net payable to Allstate Life Insurance Company.................................................         255        128
  Separate Accounts..............................................................................       5,048
                                                                                                   ----------  ---------
        Total liabilities........................................................................   1,349,693    697,587
                                                                                                   ----------  ---------
Shareholder's equity
  Common stock ($500 par value, 4,200 shares authorized, issued, and outstanding)................       2,100      2,100
  Additional capital paid-in.....................................................................      49,641     49,641
  Unrealized net capital gains (losses)..........................................................       3,357     (1,118)
  Retained income................................................................................       4,914      2,035
                                                                                                   ----------  ---------
        Total shareholder's equity...............................................................      60,012     52,658
                                                                                                   ----------  ---------
        Total liabilities and shareholder's equity...............................................  $1,409,705  $ 750,245
                                                                                                   ----------  ---------
                                                                                                   ----------  ---------
</TABLE>
    
 
   
                       See notes to financial statements.
    
 
                                      F-2
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                            STATEMENTS OF OPERATIONS
    
 
   
<TABLE>
<CAPTION>
                                                                                                  YEAR ENDED DECEMBER 31,
                                                                                              -------------------------------
                                                                                                1995       1994       1993
                                                                                              ---------  ---------  ---------
                                                                                                     ($ IN THOUSANDS)
<S>                                                                                           <C>        <C>        <C>
Revenues
  Net investment income.....................................................................  $   3,996  $   2,017  $     753
  Realized capital gains (losses)...........................................................        459                    83
                                                                                              ---------  ---------        ---
Income before income taxes..................................................................      4,455      2,017        836
Income tax expense..........................................................................      1,576        723        307
                                                                                              ---------  ---------        ---
Net income..................................................................................  $   2,879  $   1,294  $     529
                                                                                              ---------  ---------        ---
                                                                                              ---------  ---------        ---
</TABLE>
    
 
   
                       See notes to financial statements.
    
 
                                      F-3
<PAGE>
                       GLENBROOK LIFE AND ANNUITY COMPANY
                       STATEMENTS OF SHAREHOLDER'S EQUITY
 
   
<TABLE>
<CAPTION>
                                                                            ADDITIONAL   UNREALIZED NET
                                                                 COMMON       CAPITAL     CAPITAL GAINS    RETAINED
                                                                  STOCK       PAID-IN       (LOSSES)        INCOME       TOTAL
                                                               -----------  -----------  ---------------  -----------  ---------
                                                                                       ($ IN THOUSANDS)
<S>                                                            <C>          <C>          <C>              <C>          <C>
Balance, December 31, 1992...................................   $   2,100    $   9,641      $     (10)     $     212   $  11,943
  Net income.................................................                                                    529         529
  Change in unrealized net capital gains and losses..........                                     703                        703
                                                                    -----   -----------        ------          -----   ---------
Balance, December 31, 1993...................................       2,100        9,641            693            741      13,175
  Net income.................................................                                                  1,294       1,294
  Capital contribution.......................................                   40,000                                    40,000
  Change in unrealized net capital gains and losses..........                                  (1,811)                    (1,811)
                                                                    -----   -----------        ------          -----   ---------
Balance, December 31, 1994...................................       2,100       49,641         (1,118)         2,035      52,658
  Net income.................................................                                                  2,879       2,879
  Change in unrealized net capital gains and losses..........                                   4,475                      4,475
                                                                    -----   -----------        ------          -----   ---------
Balance, December 31, 1995...................................   $   2,100    $  49,641      $   3,357      $   4,914   $  60,012
                                                                    -----   -----------        ------          -----   ---------
                                                                    -----   -----------        ------          -----   ---------
</TABLE>
    
 
   
                       See notes to financial statements.
    
 
                                      F-4
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                            STATEMENTS OF CASH FLOWS
    
 
   
<TABLE>
<CAPTION>
                                                                                             YEAR ENDED DECEMBER 31,
                                                                                         -------------------------------
                                                                                           1995       1994       1993
                                                                                         ---------  ---------  ---------
                                                                                                ($ IN THOUSANDS)
<S>                                                                                      <C>        <C>        <C>
Cash flows from operating activities
  Net income...........................................................................  $   2,879  $   1,294  $     529
  Adjustments to reconcile net income to net cash from operating activities
    Deferred income taxes..............................................................        (39)
    Realized capital gains.............................................................       (459)                  (83)
    Changes in other operating assets and liabilities..................................      1,217       (180)       656
                                                                                         ---------  ---------  ---------
      Net cash from operating activities...............................................      3,598      1,114      1,102
                                                                                         ---------  ---------  ---------
Cash flows from investing activities
  Fixed income securities available for sale
    Proceeds from sales................................................................      7,836                 3,015
    Investment collections.............................................................      1,568        649        969
    Investment purchases...............................................................     (1,491)   (42,729)    (3,737)
  Participation in Separate Account....................................................    (10,069)
  Change in short-term investments, net................................................     (1,178)       667     (1,102)
                                                                                         ---------  ---------  ---------
      Net cash from investing activities...............................................     (3,334)   (41,413)      (855)
                                                                                         ---------  ---------  ---------
Cash flows from financing activities
  Capital contribution.................................................................                40,000
                                                                                         ---------  ---------  ---------
      Net cash from financing activities...............................................     --         40,000     --
                                                                                         ---------  ---------  ---------
Net increase (decrease) in cash........................................................        264       (299)       247
Cash at beginning of year..............................................................     --            299         52
                                                                                         ---------  ---------  ---------
Cash at end of year....................................................................  $     264  $  --      $     299
                                                                                         ---------  ---------  ---------
                                                                                         ---------  ---------  ---------
</TABLE>
    
 
   
                       See notes to financial statements.
    
 
                                      F-5
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                         NOTES TO FINANCIAL STATEMENTS
                                ($ IN THOUSANDS)
    
 
   
1.  ORGANIZATION AND NATURE OF OPERATIONS
    
   
    Glenbrook  Life  and  Annuity Company  (the  "Company") is  wholly  owned by
Allstate Life  Insurance Company  ("Allstate Life"),  which is  wholly owned  by
Allstate  Insurance  Company  ("Allstate"),  a  wholly-owned  subsidiary  of The
Allstate Corporation (the "Corporation"). On  June 30, 1995, Sears, Roebuck  and
Co. ("Sears") distributed its 80.3% ownership in the Corporation to Sears common
shareholders through a tax-free dividend (the "Distribution").
    
 
   
    The  Company develops and markets flexible premium deferred variable annuity
contracts and  single and  flexible premium  deferred annuities  to  individuals
through banks and financial institutions in the United States.
    
 
   
    Annuity  contracts  issued  by  the  Company  are  subject  to discretionary
withdrawal or surrender by the  contractholder, subject to applicable  surrender
charges. These contracts are reinsured with Allstate Life (Note 4) which selects
assets   to  meet  the  anticipated  cash   flow  requirements  of  the  assumed
liabilities. Allstate Life utilizes various modeling techniques in managing  the
relationship  between assets and liabilities  and employs strategies to maintain
investments which are sufficiently liquid to meet obligations to contractholders
in various interest rate scenarios.
    
 
   
    The Company monitors  economic and  regulatory developments  which have  the
potential  to impact its business. Currently there is proposed legislation which
would permit banks greater participation  in securities businesses, which  could
eventually  present an increased level of competition for sales of the Company's
annuity contracts. Furthermore, the federal  government may enact changes  which
could  possibly eliminate  the tax-advantaged  nature of  annuities or eliminate
consumers' need for tax deferral,  thereby reducing the incentive for  customers
to  purchase the  Company's products.  While it is  not possible  to predict the
outcome of such issues  with certainty, management  evaluates the likelihood  of
various  outcomes and  develops strategies, as  appropriate, to  respond to such
challenges.
    
 
   
    Certain reclassifications  have  been  made  to  the  prior  year  financial
statements to conform to the presentation for the current year.
    
 
   
2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
    
   
LIFE INSURANCE ACCOUNTING
    
 
   
    The  Company sells long-duration  contracts that do  not involve significant
risk of policyholder  mortality or  morbidity (principally  single and  flexible
premium annuities) which are considered investment contracts.
    
 
   
CONTRACTHOLDER FUNDS
    
 
   
    Contractholder  funds  arise  from  the  issuance  of  individual  and group
annuities that include an investment  component. Payments received are  recorded
as  interest-bearing  liabilities. Contractholder  funds  are equal  to deposits
received and  interest  accrued  to  the  benefit  of  the  contractholder  less
withdrawals,  mortality charges  and administrative  expenses. Credited interest
rates on contractholder funds ranged from 3.0% to 7.4% for those contracts  with
fixed interest rates and from 4.25% to 7.9% for those with flexible rates during
1995.
    
 
   
SEPARATE ACCOUNTS
    
 
   
    During  1995, the Company issued  flexible premium deferred variable annuity
contracts, the  assets  and liabilities  of  which are  legally  segregated  and
reflected  in the  accompanying statements of  financial position  as assets and
liabilities of  the  Separate  Accounts  (Glenbrook  Life  and  Annuity  Company
Variable Annuity Account and Glenbrook Life and Annuity Company Separate Account
A)   unit  investment  trusts  registered   with  the  Securities  and  Exchange
Commission. Assets of the Separate Accounts are invested in funds of  management
investment  companies. For certain  variable annuity contracts,  the Company has
entered into an exclusive distribution arrangement with distributors.
    
 
   
    The assets of the  Separate Accounts are carried  at fair value.  Unrealized
gains  and losses on the Company's participation in the Separate Account, net of
deferred income taxes,  is shown  as a  component of  shareholder's equity.  The
Company's  participation  in  the  Separate  Account,  amounting  to  $10,530 at
December 31,  1995, is  subject  to certain  withdrawal restrictions  which  are
dependent  upon aggregate fund net asset  values. In addition, limitations exist
with regard to the maximum amount which  can be withdrawn by the Company  within
any 30-day period.
    
 
   
    Investment  income and realized  gains and losses  of the Separate Accounts,
other than the portion related  to the Company's participation, accrue  directly
to  the contractholders  and, therefore,  are not  included in  the accompanying
statements of operations.  Revenues to  the Company from  the Separate  Accounts
consist  of  contract maintenance  fees, administrative  fees and  mortality and
expense risk charges, which are entirely ceded to Allstate Life.
    
 
                                      F-6
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                ($ IN THOUSANDS)
    
 
   
2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
    
   
REINSURANCE
    
 
   
    Beginning June 5, 1992, the Company  reinsures all new business to  Allstate
Life  (Note  4).  Life  insurance  in  force prior  to  that  date  is  ceded to
non-affiliated reinsurers.
    
 
   
    Contract charges and credited interest are  ceded and reflected net of  such
cessions   in  the   statements  of  operations.   Reinsurance  recoverable  and
contractholder funds  are reported  separately in  the statements  of  financial
position.
    
 
   
INVESTMENTS
    
 
   
    Fixed  income securities include bonds and mortgage-backed securities. Fixed
income securities are carried  at fair value.  The difference between  amortized
cost  and fair value, net  of deferred income taxes,  is reflected as a separate
component of  shareholder's  equity.  Provisions  are made  to  write  down  the
carrying  value of fixed income securities for  declines in value that are other
than temporary.  Such writedowns  are  included in  realized capital  gains  and
losses.
    
 
   
    Short-term investments are carried at cost which approximates fair value.
    
 
   
    Investment  income consists primarily of interest, which is recognized on an
accrual basis. Interest  income on mortgage-backed  securities is determined  on
the effective yield method, based on the estimated principal repayments. Accrual
of  income is suspended for fixed income  securities that are in default or when
the receipt of interest payments is in doubt. Realized capital gains and  losses
are determined on a specific identification basis.
    
 
   
INCOME TAXES
    
 
   
    The  income tax provision is calculated under the liability method. Deferred
tax assets and  liabilities are  recorded based  on the  difference between  the
financial  statement and tax bases of assets and liabilities and the enacted tax
rates. Deferred income taxes also arise from unrealized capital gains or  losses
on fixed income securities carried at fair value.
    
 
   
USE OF ESTIMATES
    
 
   
    The  preparation  of  financial  statements  in  conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect  the amounts reported  in the  financial statements and
accompanying notes. Actual results could differ from those estimates.
    
 
   
3.  ACCOUNTING CHANGE
    
   
    Effective December  31, 1993,  the Company  adopted Statement  of  Financial
Accounting  Standards ("SFAS") No.  115, "Accounting for  Certain Investments in
Debt and Equity Securities." SFAS  No. 115 requires that investments  classified
as  available  for  sale be  carried  at  fair value.  Previously,  fixed income
securities classified  as  available for  sale  were  carried at  the  lower  of
amortized  cost or fair  value, determined in  the aggregate. Unrealized holding
gains and losses are reflected as a separate component of shareholder's  equity,
net  of deferred  income taxes.  The net  effect of  adoption of  this statement
increased shareholder's equity at December 31,  1993 by $693, with no impact  on
net income.
    
 
   
4.  RELATED PARTY TRANSACTIONS
    
   
REINSURANCE
    
 
   
    Contract  charges ceded to  Allstate Life under  reinsurance agreements were
$1,523 and $409 in 1995 and  1994, respectively. Credited interest and  expenses
ceded  to  Allstate Life  amounted  to $71,905  and  $26,177 in  1995  and 1994,
respectively.  Investment   income   earned   on  the   assets   which   support
contractholder  funds is not  included in the  Company's financial statements as
those assets were transferred  to Allstate Life under  the terms of  reinsurance
treaties.  Reinsurance ceded  arrangements do not  discharge the  Company as the
primary insurer.
    
 
   
BUSINESS OPERATIONS
    
 
   
    The Company utilizes services and  business facilities owned or leased,  and
operated  by  Allstate  in  conducting  its  business  activities.  The  Company
reimburses Allstate for the operating expenses incurred by Allstate on behalf of
the Company. The cost to the Company is determined by various allocation methods
and is primarily related to the level of services provided. Operating  expenses,
including  compensation and retirement and  other benefit programs, allocated to
the Company  were $348,  $271 and  $59  in 1995,  1994 and  1993,  respectively.
Investment-related  expenses are  retained by the  Company. All  other costs are
assumed by Allstate Life under reinsurance treaties.
    
 
                                      F-7
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                ($ IN THOUSANDS)
    
 
   
4.  RELATED PARTY TRANSACTIONS (CONTINUED)
    
   
LAUGHLIN GROUP
    
 
   
    Laughlin Group,  Inc. ("Laughlin"),  a wholly-owned  subsidiary of  Laughlin
Group  Holdings  Inc.,  a wholly-owned  subsidiary  of Allstate  Life  which was
acquired in  September 1995,  is a  third-party marketer  which distributes  the
products  of  insurance carriers  including  the Company.  Laughlin  markets the
Company's flexible  premium deferred  variable  annuity contracts  and  flexible
premium deferred annuities. Sales commissions paid to Laughlin subsequent to the
acquisition date of $3,439 were ceded to Allstate Life.
    
 
   
5.  INCOME TAXES
    
   
    Allstate  Life and its  life insurance subsidiaries,  including the Company,
will file a consolidated federal income tax return. Tax liabilities and benefits
realized by the consolidated group are allocated as generated by the  respective
subsidiaries,  whether or not such benefits  generated by the subsidiaries would
be available  on a  separate  return basis.  The  Corporation and  its  domestic
subsidiaries  including the Company (the "Allstate  Group"), will be eligible to
file a consolidated tax return beginning in the year 2000.
    
 
   
    Prior to the  Distribution, the  Allstate Group  joined with  Sears and  its
domestic  business units  (the "Sears  Group") in  the filing  of a consolidated
federal income tax return (the "Sears Tax Group") and were parties to a  federal
income  tax allocation agreement  (the "Tax Sharing Agreement").  As a member of
the Sears Tax Group,  the Corporation was jointly  and severally liable for  the
consolidated  income tax liability of the Sears Tax Group. Under the Tax Sharing
Agreement, the Company, through  the Corporation, paid to  or received from  the
Sears  Group the amount, if  any, by which the  Sears Tax Group's federal income
tax liability was affected by virtue of  inclusion of the Allstate Group in  the
consolidated  federal  income  tax  return. Effectively,  this  resulted  in the
Company's annual income tax provision being  computed as if the Company filed  a
separate  return, except that items such as net operating losses, capital losses
or similar  items which  might not  be immediately  recognizable in  a  separate
return,  were allocated according to the  Tax Sharing Agreement and reflected in
the Company's provision  to the  extent that such  items reduced  the Sears  Tax
Group's federal tax liability.
    
 
   
    The  Allstate Group  and Sears  Group have  entered into  an agreement which
governs their respective rights and  obligations with respect to federal  income
taxes  for all periods prior to the Distribution ("Consolidated Tax Years"). The
agreement provides that all Consolidated Tax Years will continue to be  governed
by  the Tax Sharing Agreement  with respect to the  Company's federal income tax
liability and taxes payable to or recoverable from the Sears Group.
    
 
   
    The components of the deferred income tax assets and liabilities at December
31, 1995 and 1994 are as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                                                           1995       1994
                                                                                                         ---------  ---------
<S>                                                                                                      <C>        <C>
Unrealized net capital losses on fixed income securities...............................................  $  --      $     602
Other..................................................................................................                     4
                                                                                                         ---------        ---
  Total deferred assets................................................................................     --            606
                                                                                                         ---------        ---
                                                                                                         ---------        ---
Unrealized net capital gains on fixed income securities................................................  $  (1,807)
Difference in tax bases of investments.................................................................        (21)
Other..................................................................................................                   (64)
                                                                                                         ---------        ---
  Total deferred liabilities...........................................................................     (1,828)       (64)
                                                                                                         ---------        ---
  Net deferred (liability) asset.......................................................................  $  (1,828) $     542
                                                                                                         ---------        ---
                                                                                                         ---------        ---
</TABLE>
    
 
   
    The components of income tax expense are as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                                                  YEAR ENDED DECEMBER 31,
                                                                                              -------------------------------
                                                                                                1995       1994       1993
                                                                                              ---------  ---------  ---------
<S>                                                                                           <C>        <C>        <C>
Current.....................................................................................  $   1,615  $     652  $     290
Deferred....................................................................................        (39)        71         17
                                                                                              ---------        ---        ---
  Income tax expense........................................................................  $   1,576  $     723  $     307
                                                                                              ---------        ---        ---
                                                                                              ---------        ---        ---
</TABLE>
    
 
   
    The Company paid income taxes of $874, $57 and $290 in 1995, 1994 and  1993,
respectively,  under the  Tax Sharing  Agreement. The  Company had  income taxes
payable to Allstate  Life of  $1,637 and  $605 at  December 31,  1995 and  1994,
respectively.
    
 
                                      F-8
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                ($ IN THOUSANDS)
    
 
   
6.  INVESTMENTS
    
   
FAIR VALUES
    
 
   
    The  amortized cost,  fair value and  gross unrealized gains  and losses for
fixed income securities are as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                                                GROSS UNREALIZED
                                                                                  AMORTIZED   --------------------
                                                                                    COST        GAINS     LOSSES    FAIR VALUE
                                                                                 -----------  ---------  ---------  -----------
<S>                                                                              <C>          <C>        <C>        <C>
AT DECEMBER 31, 1995
U.S. government and agencies...................................................   $  24,722   $   3,470     --       $  28,192
Corporate......................................................................       1,304         120                  1,424
Mortgage-backed securities.....................................................      18,086       1,113                 19,199
                                                                                 -----------  ---------  ---------  -----------
  Totals.......................................................................   $  44,112   $   4,703     --       $  48,815
                                                                                 -----------  ---------  ---------  -----------
                                                                                 -----------  ---------  ---------  -----------
AT DECEMBER 31, 1994
U.S. government and agencies...................................................   $  31,005   $      30  $   1,126   $  29,909
Mortgage-backed securities.....................................................      20,522                    624      19,898
                                                                                 -----------  ---------  ---------  -----------
  Total........................................................................   $  51,527   $      30  $   1,750   $  49,807
                                                                                 -----------  ---------  ---------  -----------
                                                                                 -----------  ---------  ---------  -----------
</TABLE>
    
 
   
SCHEDULED MATURITIES
    
 
   
    The scheduled maturities of  fixed income securities  available for sale  at
December 31, 1995 are as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                                                      AMORTIZED     FAIR
                                                                                                        COST        VALUE
                                                                                                     -----------  ---------
<S>                                                                                                  <C>          <C>
Due in one year or less............................................................................   $     398   $     403
Due after one year through five years..............................................................
Due after five years through ten years.............................................................      15,883      17,681
Due after ten years................................................................................       9,745      11,532
                                                                                                     -----------  ---------
                                                                                                         26,026      29,616
Mortgage-backed securities.........................................................................      18,086      19,199
                                                                                                     -----------  ---------
  Total............................................................................................   $  44,112   $  48,815
                                                                                                     -----------  ---------
                                                                                                     -----------  ---------
</TABLE>
    
 
   
    Actual maturities may differ from those scheduled as a result of prepayments
by the issuers.
    
 
   
UNREALIZED NET CAPITAL GAINS AND LOSSES
    
 
   
    Unrealized  net capital gains and losses  on fixed income securities and the
Company's participation in the Separate Account included in shareholder's equity
at December 31, 1995 are as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                                                                UNREALIZED
                                                                                         AMORTIZED     FAIR     NET GAINS/
                                                                                           COST        VALUE     (LOSSES)
                                                                                        -----------  ---------  -----------
<S>                                                                                     <C>          <C>        <C>
Fixed income securities...............................................................   $  44,112   $  48,815   $   4,703
Participation in Separate Account.....................................................      10,069      10,530         461
Deferred income taxes.................................................................                              (1,807)
                                                                                                                -----------
  Total...............................................................................                           $   3,357
                                                                                                                -----------
                                                                                                                -----------
</TABLE>
    
 
                                      F-9
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                ($ IN THOUSANDS)
    
 
   
6.  INVESTMENTS (CONTINUED)
    
   
    The change  in unrealized  net capital  gains and  losses for  fixed  income
securities  and  the  Company's  participation in  the  Separate  Account  is as
follows:
    
 
   
<TABLE>
<CAPTION>
                                                                                                  YEAR ENDED DECEMBER 31,
                                                                                              -------------------------------
                                                                                                1995       1994       1993
                                                                                              ---------  ---------  ---------
<S>                                                                                           <C>        <C>        <C>
Fixed income securities.....................................................................  $   6,423  $  (2,786) $   1,076
Participation in Separate Account in 1995...................................................        461
Deferred income taxes.......................................................................     (2,409)       975       (373)
                                                                                              ---------  ---------  ---------
Change in unrealized net capital gains and losses...........................................  $   4,475  $  (1,811) $     703
                                                                                              ---------  ---------  ---------
                                                                                              ---------  ---------  ---------
</TABLE>
    
 
   
COMPONENTS OF NET INVESTMENT INCOME
    
 
   
    Investment income by investment type is as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                                                     YEAR ENDED DECEMBER 31,
                                                                                                 -------------------------------
                                                                                                   1995       1994       1993
                                                                                                 ---------  ---------  ---------
<S>                                                                                              <C>        <C>        <C>
Investment income:
  Fixed income securities......................................................................  $   3,850  $   1,984  $     729
  Short-term...................................................................................        113         48         35
  Participation in Separate Account in 1995....................................................         69
                                                                                                 ---------  ---------        ---
Investment income, before expense..............................................................      4,032      2,032        764
Investment expense.............................................................................         36         15         11
                                                                                                 ---------  ---------        ---
Net investment income..........................................................................  $   3,996  $   2,017  $     753
                                                                                                 ---------  ---------        ---
                                                                                                 ---------  ---------        ---
</TABLE>
    
 
   
REALIZED CAPITAL GAINS AND LOSSES
    
 
   
    Realized capital gains on investments are as follows:
    
 
   
<TABLE>
<CAPTION>
                                                                                                         YEAR ENDED
                                                                                                        DECEMBER 31,
                                                                                                      ----------------
                                                                                                      1995  1994  1993
                                                                                                      ----  ----  ----
<S>                                                                                                   <C>   <C>   <C>
Fixed income securities.............................................................................  $459  $--   $83
Income tax..........................................................................................   161         29
                                                                                                      ----  ----  ----
Net realized gains..................................................................................  $298  $--   $54
                                                                                                      ----  ----  ----
                                                                                                      ----  ----  ----
</TABLE>
    
 
   
PROCEEDS FROM SALES OF FIXED INCOME SECURITIES
    
 
   
    The proceeds from sales of investments in fixed income securities, excluding
calls, were $7,836 and $3,015, with related gross realized gains of $459 and $22
for 1995 and 1993, respectively. There were no such amounts realized in 1994.
    
 
   
SECURITIES ON DEPOSIT
    
 
   
    At December  31, 1995,  fixed income  securities with  a carrying  value  of
$10,085 were on deposit with regulatory authorities as required by law.
    
 
   
7.  FINANCIAL INSTRUMENTS
    
   
    In  the normal course of business,  the Company invests in various financial
assets and incurs various financial liabilities. The fair value of all financial
assets other  than  fixed  income  securities and  all  liabilities  other  than
contractholder funds approximates their carrying value as they are short-term in
nature.
    
 
   
    Fair  values for fixed income securities  are based on quoted market prices.
The December 31, 1995 and 1994 fair  values and carrying values of fixed  income
securities are discussed in Note 6.
    
 
   
    The  fair value of contractholder funds  on investment contracts is based on
the terms of the underlying contracts. Reserves on investment contracts with  no
stated  maturities (single premium and  flexible premium deferred annuities) are
valued at the fund  balance less surrender charge.  The fair value of  immediate
annuities with fixed terms are estimated using discounted cash flow calculations
based on
    
 
                                      F-10
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                   NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                ($ IN THOUSANDS)
    
 
   
7.  FINANCIAL INSTRUMENTS (CONTINUED)
    
   
interest  rates currently offered for contracts with similar terms and duration.
Contractholder funds on investment contracts had a carrying value of  $1,340,925
at December 31, 1995 and a fair value of $1,282,248. The carrying value and fair
value at December 31, 1994 were $696,854 and $670,930, respectively.
    
 
   
8.  STATUTORY FINANCIAL INFORMATION
    
   
    The  following  tables  reconcile  net income  and  shareholder's  equity as
reported herein in conformity with generally accepted accounting principles with
statutory net  income and  capital and  surplus, determined  in accordance  with
statutory  accounting practices prescribed or  permitted by insurance regulatory
authorities:
    
 
   
<TABLE>
<CAPTION>
                                                                                                       NET INCOME
                                                                                                       YEAR ENDED
                                                                                                      DECEMBER 31,
                                                                                             -------------------------------
                                                                                               1995       1994       1993
                                                                                             ---------  ---------  ---------
<S>                                                                                          <C>        <C>        <C>
Balance per generally accepted accounting principles.......................................  $   2,879  $   1,294  $     529
  Income taxes.............................................................................       (164)        29          8
  Interest maintenance reserve.............................................................                   (53)        27
  Non-admitted assets and statutory reserves...............................................        (46)        15        (47)
                                                                                             ---------  ---------        ---
Balance per statutory accounting practices.................................................  $   2,669  $   1,285  $     517
                                                                                             ---------  ---------        ---
                                                                                             ---------  ---------        ---
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                                   SHAREHOLDER'S
                                                                                       EQUITY
                                                                                    DECEMBER 31,
                                                                                  ----------------
                                                                                   1995     1994
                                                                                  -------  -------
<S>                                                                               <C>      <C>
Balance per generally accepted accounting principles............................  $60,012  $52,658
  Income taxes..................................................................      698     (575)
  Unrealized net capital gains (losses).........................................   (4,703)   1,719
  Non-admitted assets and statutory reserves....................................   (1,702)  (1,635)
                                                                                  -------  -------
Balance per statutory accounting practices......................................  $54,305  $52,167
                                                                                  -------  -------
                                                                                  -------  -------
</TABLE>
    
 
   
PERMITTED STATUTORY ACCOUNTING PRACTICES
    
 
   
    The Company prepares their statutory financial statements in accordance with
accounting principles and  practices prescribed  or permitted  by the  insurance
department  of the State of  Illinois. Prescribed statutory accounting practices
include a  variety of  publications  of the  National Association  of  Insurance
Commissioners,  as well as  state laws, regulations,  and general administrative
rules.  Permitted  statutory  accounting  practices  encompass  all   accounting
practices not so prescribed. The Company does not follow any permitted statutory
accounting  practices  that  have  a material  effect  on  statutory  surplus or
risk-based capital.
    
 
   
DIVIDENDS
    
 
   
    The ability  of  the Company  to  pay  dividends is  dependent  on  business
conditions, income, cash requirements of the Company and other relevant factors.
The  payment of shareholder  dividends by insurance  companies without the prior
approval of the state insurance regulator is limited to formula amounts based on
net income  and capital  and surplus,  determined in  accordance with  statutory
accounting  practices, as well as the timing and amount of dividends paid in the
preceding twelve months. The  maximum amount of dividends  that the Company  can
distribute  during  1996  without  prior  approval  of  both  the  Illinois  and
California Departments of Insurance is $5,220.
    
 
                                      F-11
<PAGE>
   
                       GLENBROOK LIFE AND ANNUITY COMPANY
                            SCHEDULE IV--REINSURANCE
                                ($ IN THOUSANDS)
    
   
<TABLE>
<CAPTION>
                                                                                                 GROSS
                                                                                                AMOUNT       CEDED    NET AMOUNT
                                                                                              -----------  ---------  -----------
<S>                                                                                           <C>          <C>        <C>
YEAR ENDED DECEMBER 31, 1995
Life insurance in force.....................................................................   $   1,250   $   1,250   $  --
                                                                                                   -----   ---------       -----
                                                                                                   -----   ---------       -----
Premiums and contract charges:
  Life and annuities........................................................................   $   6,571   $   6,571   $  --
                                                                                                   -----   ---------       -----
                                                                                                   -----   ---------       -----
 
<CAPTION>
 
                                                                                                 GROSS
                                                                                                AMOUNT       CEDED    NET AMOUNT
                                                                                              -----------  ---------  -----------
<S>                                                                                           <C>          <C>        <C>
YEAR ENDED DECEMBER 31, 1994
Life insurance in force.....................................................................   $   1,250   $   1,250   $  --
                                                                                                   -----   ---------       -----
                                                                                                   -----   ---------       -----
Premiums and contract charges:
  Life and annuities........................................................................   $     409   $     409   $  --
                                                                                                   -----   ---------       -----
                                                                                                   -----   ---------       -----
<CAPTION>
 
                                                                                                 GROSS
                                                                                                AMOUNT       CEDED    NET AMOUNT
                                                                                              -----------  ---------  -----------
<S>                                                                                           <C>          <C>        <C>
YEAR ENDED DECEMBER 31, 1993
Life insurance in force.....................................................................   $   1,250   $   1,250   $  --
                                                                                                   -----   ---------       -----
                                                                                                   -----   ---------       -----
Premiums and contract charges:
  Life......................................................................................           6           6      --
  Contract charges..........................................................................          70          70      --
                                                                                                   -----   ---------       -----
                                                                                               $      76   $      76   $  --
                                                                                                   -----   ---------       -----
                                                                                                   -----   ---------       -----
</TABLE>
    
 
                                      F-12
<PAGE>
                                   APPENDIX A
                            MARKET VALUE ADJUSTMENT
 
    The Market Value Adjustment is based on the following:
 
<TABLE>
<S>        <C>        <C>
I          =          the  Treasury Rate for a maturity equal  to the Sub-account's Guarantee Period for the
                      week preceding the establishment of the Sub-account.
 
N          =          the number of  whole and partial  years from the  date we receive  the withdrawal,  or
                      death  benefit request, or from the Payout Start  Date to the end of the Sub-account's
                      Guarantee Period.
 
J          =          the Treasury Rate for a maturity of length N for the week preceding the receipt of the
                      withdrawal request, death benefit request, or income payment request. If a Note with a
                      maturity of length N is not  available, a weighted average will  be used. If N is  one
                      year or less, J will be the 1-year Treasury Rate.
</TABLE>
 
    Treasury  Rate  means  the U.S.  Treasury  Note Constant  Maturity  yield as
reported in Federal Reserve Bulletin Release H.15.
 
    The Market Value Adjustment factor is determined from the following formula:
 
            .9 X (I-J) X N
 
    Any transfer, withdrawal in excess of  the free withdrawal amount, or  death
benefit  paid from a Sub-account of the  Fixed Account will be multiplied by the
Market Value Adjustment factor to determine the Market Value Adjustment.
 
                                  ILLUSTRATION
 
EXAMPLE OF MARKET VALUE ADJUSTMENT
 
<TABLE>
    <S>                <C>
    Purchase Payment:  $10,000
    Guarantee Period:  5 Years
    Interest Rate:     4.75%
    Full Withdrawal:   End of Contract Year 3
</TABLE>
 
   NOTE: THIS ILLUSTRATION ASSUMES THAT PREMIUM TAXES WERE NOT APPLICABLE.
 
EXAMPLE 1: (ASSUMES DECLINING INTEREST RATES)
 
Step 1:  Calculate Account Value at End of Contract Year 3:
 
                    = 10,000.00 X (1.0475)3 = $11,493.76
 
Step 2:  Calculate the Free Withdrawal Amount:
 
                    = 10% X (10,000.00) = $1,000.00
 
Step 3:  Calculate the Withdrawal Charge:
 
                    = .05 X (10,000.00 - 1,000.00) = $450.00
 
Step 4:  Calculate the Market Value Adjustment:
         I = 4.75%
         J = 4.25%
         N = 730 DAYS = 2
         ----------
         365 days
 
                                      A-1
<PAGE>
 
Market Value Adjustment Factor: .9 X (I-J) X N
 
         = .9 X (.0475 - .0425) X 2 = .009
 
Market Value Adjustment = Factor X Amount Subject to Market Value Adjustment:
 
         = .009 X (11,493.76 - 1,000) = $94.44
 
Step 5:  Calculate The Amount Received by Customers as a Result of a Full
         Withdrawal at the end of Contract Year 3:
 
         = 11,493.76 - 450.00 + 94.44 = $11,138.20
 
EXAMPLE 2: (ASSUMES RISING INTEREST RATES)
 
Step 1:  Calculate Account Value at End of Contract Year 3:
 
         = 10,000.00 X (1.0475)3 = $11,493.76
 
Step 2:  Calculate the Free Withdrawal Amount
 
         = 10% X (10,000.00) = $1,000.00
 
Step 3:  Calculate the Withdrawal Charge:
 
         = .05 X (10,000.00 - 1,000.00) = $450.00
 
Step 4:  Calculate the Market Value Adjustment:
         I = 4.75%
         J = 5.25%
         N = 730 DAYS = 2
         ----------
         365 days
 
Market Value Adjustment Factor: .9 X (I-J) X N
 
         = .9 X (.0475 - .0525) X (2) = -.009
 
Market Value Adjustment = Factor X Amount Subject to Market Value Adjustment:
 
         = -.009 X ($11,493.76 - 1,000) = -94.44
 
Step 5:  Calculate The Net Withdrawl Value at End of Contract Year 3:
 
         = 11,493.76 - 450.00 - 94.44 = $10,949.32
 
                                      A-2
<PAGE>
   
             STATEMENT OF ADDITIONAL INFORMATION: TABLE OF CONTENTS
    
 
   
<TABLE>
<CAPTION>
                                                                                                                      PAGE
                                                                                                                      -----
<S>                                                                                                                <C>
ADDITIONS, DELETIONS OR SUBSTITUTIONS OF INVESTMENTS.............................................................
REINVESTMENT.....................................................................................................
THE CONTRACT.....................................................................................................
  Purchase of Contracts..........................................................................................
  Performance Data...............................................................................................
  Tax-free Exchanges (1035 Exchanges, Rollovers and Transfers)...................................................
  Premium Taxes..................................................................................................
  Tax Reserves...................................................................................................
INCOME PAYMENTS..................................................................................................
  Calculation of Variable Annuity Unit Values....................................................................
GENERAL MATTERS..................................................................................................
  Incontestability...............................................................................................
  Settlements....................................................................................................
  Safekeeping of the Variable Account's Assets...................................................................
FEDERAL TAX MATTERS..............................................................................................
  Introduction...................................................................................................
  Taxation of Glenbrook Life and Annuity Company.................................................................
  Exceptions to the Non-Natural Owner Rule.......................................................................
  IRS Required Distribution at Death Rules.......................................................................
  Qualified Plans................................................................................................
  Types of Qualified Plans.......................................................................................
VARIABLE ACCOUNT FINANCIAL STATEMENTS............................................................................
</TABLE>
    
 
                                      B-1
<PAGE>
                                   ORDER FORM
 
    Please send me a copy of the most recent Statement of Additional Information
for the Glenbrook Life and Annuity Company Separate Account A.
 
<TABLE>
<S>              <C>
- --------------   -------------------------------------------
    (Date)                          (Name)
 
                 -------------------------------------------
                               (Street Address)
 
                 -------------------------------------------
                         (City)  (State)  (Zip Code)
</TABLE>
 
Send to:
Glenbrook Life and Annuity Company
Post Office Box 94039
Palatine, Illinois 60094-4039
 
    Attention: VA Customer Service Unit
 
                                      B-2
<PAGE>
   
                             PART II

              INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 13.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

          Pursuant to Item 511 of Regulation S-K, the Registrant
hereby represents that the following expenses totaling approximately
$72,841 will be incurred or are anticipated to be incurred in connection
with the issuance and distribution of the securities to be registered:
registration fees - $17,341; cost of printing and engraving - $50,000; 
legal fees - $5,000; and accounting fees $500. All amounts are estimated.

ITEM 14.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

          The By-Laws of Glenbrook Life and Annuity Company
("Registrant") which are incorporated herein by reference as
Exhibit (3), provide that Registrant will indemnify its officers
and directors for certain damages and expenses that may be incurred
in the performance of their duty to Registrant.  No indemnification
is provided, however, when such person is adjudged to be liable for
negligence or misconduct in the performance of his or her duty,
unless indemnification is deemed appropriate by the court upon
application.

ITEM 15.  RECENT SALES OF UNREGISTERED SECURITIES.

          Not applicable.

ITEM 16.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

          EXHIBIT NO.         DESCRIPTION

          (1)       Underwriting Agreement
          (2)       Not Applicable
          (3)       (i)  Articles of Incorporation*
                    (ii) By-Laws**
          (4)       Form of Glenbrook Life and Annuity Company
                    Flexible Premium Deferred Variable Annuity
                    Contract and Application**
          (5)       Opinion of General Counsel re: Legality***
          (6)       Not Applicable
          (7)       Not Applicable
          (8)       Not Applicable
          (9)       Not Applicable
          (10)      Reinsurance Agreement between Glenbrook Life
                    and Annuity Company and Allstate Life
                    Insurance Company** 
          (11)      Not Applicable
          (12)      Not Applicable
          (14)      Not Applicable
          (15)      Not Applicable
          (16)      Not Applicable
    
                                         II-1
<PAGE>
   
          (21)      Not Applicable
          (23)(a)   Consent of Independent Public Accountants
          (23)(b)   Consent of Attorneys**
          (24)      Powers of Attorney***, ****
          (25)      Not Applicable
          (26)      Not Applicable
          (27)      Financial Data Schedule
          (28)      Not Applicable
          (99)      Resolution of Board of Directors


*    Previously filed in Form N-4 Registration Statement, No. 33-60882 dated 
     April 9, 1993 and incorporated by reference.

**   Previously filed in Form N-4 Registration Statement, No. 33-62203 dated 
     November 21, 1995 and incorporated by reference.

***  Previously filed in Form S-1 Registration Statement, No. 33-62193 dated
     August 28, 1995.

**** Filed herewith powers of attorney for James P. Zils and
     Casey J. Sylla.


ITEM 17.  UNDERTAKINGS.

          The undersigned registrant, Glenbrook Life and Annuity
Company, hereby undertakes:

          (1)  To file, during any period in which offers or
               sales are being made, a post-effective amendment
               to this registration statement:

               (i)  To include any prospectus required by section
                    10(a)(3) of the Securities Act of 1933;

               (ii) To reflect in the prospectus any facts or
                    events arising after the effective date of
                    the registration statement (or the most
                    recent post-effective amendment thereof)
                    which, individually or in the aggregate,
                    represent a fundamental change in the
                    information set forth in the registration
                    statement;

               (iii)     To include any material information with
                         respect to the plan of distribution not
    

                                          II-2
<PAGE>
   
                         previously disclosed in the registration
                         statement or any material change to such
                         information in the registration
                         statement;

          (2)  That, for the purpose of determining any liability
               under the Securities Act of 1933, each such post-effective 
               amendment shall be deemed to be a new registration
               statement relating to the securities
               offered therein, and the offering of such
               securities at that time shall be deemed to be the
               initial bona fide offering thereof;

          (3)  To remove from registration by means of a post-effective 
               amendment any of the securities being
               registered which remain unsold at the termination
               of the offering.  

         Insofar as indemnification for liabilities arising under the 
Securities Act of 1933 may be permitted to directors, officers and 
controlling persons of the registrant, Glenbrook Life and Annuity Company, 
pursuant to the foregoing provisions, or otherwise, the registrant has been 
advised that in the opinion of the Securities and Exchange Commission such 
indemnification is against public policy as expressed in the Act and is, 
therefore, unenforceable.  In the event that a claim for indemnification 
against such liabilities (other that the payment by the registrant of 
expenses incurred or paid by a director, officer or controlling person of the 
registrant in the successful defense of any action, suit or proceeding) is 
asserted by such director, officer or controlling person in connection with 
the securities being registered, the registrant will, unless in the opinion 
of its counsel the matter has been settled by controlling precedent, submit 
to a court of appropriate jurisdiction the question whether such 
indemnification by it is against public policy as expressed in the Act and 
will be governed by the final adjudication of such issue.
    
                                 II-3
<PAGE>
   
                                  SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the 
registrant, 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, in the Township of Northfield State of 
Illinois, on the 22nd day of March, 1996.

                                      GLENBROOK LIFE AND ANNUITY COMPANY
                                      (Registrant)

(SEAL)

   test: /s/PAUL N. KIERIG            By: /s/MICHAEL J. VELOTTA
        -----------------------           -----------------------------
            Paul N. Kierig                   Michael J. Velotta
            Assistant Secretary              Vice President, Secretary and
                                              General Counsel

     Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been duly signed below by the following Directors 
and Officers of Glenbrook Life and Annuity Company on the 22nd day of 
March, 1996.

 */LOUIS G. LOWER, II          Chairman of the Board of Directors and 
- ----------------------          Chief Executive Officer
   Louis G. Lower, II           (Principal Executive Officer)


/s/MICHAEL J. VELOTTA          Vice President, Secretary, General
- ----------------------          Counsel and Director
   Michael J. Velotta

 */MARLA G. FRIEDMAN           President, Chief Operating Officer 
- ----------------------          and Director
   Marla G. Friedman

 */PETER H. HECKMAN            Vice President and Director
- ----------------------
   Peter H. Heckman   

 */G. CRAIG WHITEHEAD          Senior Vice President and Director
- ----------------------
   G. Craig Whitehead

**/JAMES P. ZILS               Treasurer
- ---------------------
   James P. Zils

**/CASEY J. SYLLA              Chief Investment Officer
- ----------------------
   Casey J. Sylla

 */ BARRY S. PAUL              Assistant Vice President and Controller
- ----------------------          (Principal Accounting Officer)
    Barry S. Paul


 */ By Michael J. Velotta, pursuant to Power of Attorney, previously filed.
**/ By Michael J. Velotta, pursuant to Power of Attorney, filed herewith.
    

                                   II-4

<PAGE>
   
                        INDEX TO EXHIBITS

The following exhibits are filed herewith:

(1)           Underwriting Agreement
(2)           Not Applicable
(3)           Articles of Incorporation*
              By-Laws**
(4)           Form of Glenbrook Life and Annuity Company Flexible
              Premium Deferred Variable Annuity Contract and
              Application**
(5)           Opinion of General Counsel re: Legality***
(6)           Not Applicable
(7)           Not Applicable
(8)           Not Applicable
(9)           Not Applicable
(10)          Reinsurance Agreement between Glenbrook Life and
              Annuity Company and Allstate Life Insurance Company** 
(11)          Not Applicable
(12)          Not Applicable
(14)          Not Applicable
(15)          Not Applicable
(16)          Not Applicable
(21)          Not Applicable
(23)(a)       Consent of Independent Public Accountants
(23)(b)       Consent of Attorneys**
(24)          Powers of Attorney***, ****
(25)          Not Applicable
(26)          Not Applicable
(27)          Financial Data Schedule
(28)          Not Applicable
(99)          Resolution of Board of Directors


*        Previously filed in Form N-4 Registration Statement, No. 33-60882 
         dated April 9, 1993 and incorporated by reference.

**       Previously filed in Form N-4 Registration Statement, No. 33-62203 
         dated November 21, 1995 and incorporated by
         reference.

***      Previously filed in Form S-1 Registration Statement, No. 33-62193 
         dated August 28, 1995.

****     Filed herewith powers of attorney for James P. Zils and
         Casey J. Sylla.
    


<PAGE>
                                                                       EXHIBIT 1
 
                             UNDERWRITING AGREEMENT
 
    THIS  AGREEMENT, is entered into  on this 1st day  of December, 1995, by and
among GLENBROOK LIFE AND ANNUITY COMPANY, ("Glenbrook Life" or "Company") a life
insurance company organized under the laws of the State of Illinois, on its  own
and  on behalf  of the  GLENBROOK LIFE AND  ANNUITY COMPANY  SEPARATE ACCOUNT A,
Separate Account") a separate account established pursuant to the insurance laws
of  the  State  of  Illinois,  and  ALLSTATE  LIFE  FINANCIAL  SERVICES,   INC.,
("Principal  Underwriter"), a corporation organized under  the laws of the state
of Delaware.
 
                                    RECITALS
 
    WHEREAS, Company proposes to  issue to the  public certain variable  annuity
contracts identified in the Attachment A ("Contracts"); and
 
    WHEREAS,  Company, by resolution  adopted on September  6, 1995, established
the Separate Account for the purpose of issuing the Contracts; and
 
    WHEREAS, the Separate Account is registered with the Securities and Exchange
Commission ("Commission")  as  a  unit investment  trust  under  the  Investment
Company Act of 1940 (File Nos. 33-62203, 811-7351); and
 
    WHEREAS,  the  Contracts to  be issued  by Company  are registered  with the
Commission under the Securities  Act of 1933 and  the Investment Company Act  of
1940.  (File Nos: 33-62193,  and 33-62203, 811-7351)  for offer and  sale to the
public and otherwise are in compliance with all applicable laws; and
 
    WHEREAS,  Principal  Underwriter,  a  broker-dealer  registered  under   the
Securities  Exchange Act  of 1934  and a member  of the  National Association of
Securities Dealers, Inc. ("NASD"), proposes  to act as principal underwriter  on
an  agency  (best  efforts) basis  in  the  marketing and  distribution  of said
Contracts; and
 
    WHEREAS, Company desires to obtain the services of Principal Underwriter  as
an  underwriter and distributor of said  Contracts issued by Company through the
Separate Account;
 
    NOW THEREFORE,  in  consideration  of  the  foregoing,  and  of  the  mutual
covenants  and  conditions set  forth herein,  and for  other good  and valuable
consideration, the Company, the Separate Account, and the Principal  Underwriter
hereby agree as follows:
 
    1.  AUTHORITY AND DUTIES
 
(a)  Principal Underwriter  will serve as  an underwriter and  distributor on an
    agency basis for the Contracts which  will be issued by the Company  through
    the Separate Account.
 
(b)  Principal Underwriter will use its  best efforts to provide information and
    marketing assistance to  licensed insurance agents  and broker-dealers on  a
    continuing  basis. However,  Principal Underwriter shall  be responsible for
    compliance with the requirements of state broker-dealer regulations and  the
    Securities  Exchange Act of 1934 as each applies to Principal Underwriter in
    connection with  its  duties as  distributor  of said  Contracts.  Moreover,
    Principal Underwriter shall conduct its affairs in accordance with the rules
    of Fair Practice of the NASD.
 
(c)  Subject to agreement with the Company, Principal Underwriter may enter into
    selling agreements  with  broker-dealers  which  are  registered  under  the
    Securities  Exchange  Act of  1934 and/or  authorized  by applicable  law or
    exemptions to sell variable annuity contracts issued by Company through  the
    Separate Account. Any such contractual arrangement is expressly made subject
    to   this  Agreement,  and  Principal  Underwriter  will  at  all  times  be
    responsible to  Company  for  supervision of  compliance  with  the  federal
    securities laws regarding distribution of Contracts.
 
    2.  WARRANTIES
 
(a) The Company represents and warrants to Principal Underwriter that:
 
     (i) Registration Statements (on Form N-4 and S-1) for each of the Contracts
         identified  in Attachment A have been  filed with the Commission in the
         form previously delivered to Principal  Underwriter and that copies  of
         any   and  all  amendments  thereto  will  be  forwarded  to  Principal
         Underwriter at the time that they are filed with Commission;
 
    (ii) The Registration Statements and  any further amendments or  supplements
         thereto  will,  when they  become  effective, conform  in  all material
         respects to the  requirements of  the Securities  Act of  1933 and  the
         Investment  Company Act of  1940, and the rules  and regulations of the
         Commission under such Acts, and  will not contain any untrue  statement
         of  a material  fact or omit  to state  a material fact  required to be
         stated  therein  or  necessary  to  make  the  statements  therein  not
         misleading;  provided, however,  that this  representation and warranty
         shall not apply to any statement or omission made in reliance upon  and
         in  conformity  with information  furnished  in writing  to  Company by
         Principal Underwriter expressly for use therein;
<PAGE>
    (iii) The Company is validly existing as  a stock life insurance company  in
          good  standing under the laws of the  State of Illinois, with power to
          own its  properties  and conduct  its  business as  described  in  the
          Prospectus,  and  has  been  duly  qualified  for  the  transaction of
          business and  is  in  good  standing under  the  laws  of  each  other
          jurisdiction  in which it  owns or leases  properties, or conducts any
          business;
 
    (iv) The Contracts to  be issued  by the  Company and  through the  Separate
         Account  and offered for sale by Principal Underwriter on behalf of the
         Company hereunder  have  been duly  and  validly authorized  and,  when
         issued and delivered with payment therefore as provided herein, will be
         duly  and validly  issued and will  conform to the  description of such
         Contracts contained in the Prospectuses relating thereto;
 
    (v) Those persons who offer and sell  the Contracts are to be  appropriately
        licensed or appointed to comply with the state insurance laws;
 
    (vi) The   performance  of  this  Agreement  and  the  consummation  of  the
         transactions contemplated  by  this  Agreement will  not  result  in  a
         violation  of any  of the provisions  of or default  under any statute,
         indenture, mortgage, deed of trust,  note agreement or other  agreement
         or  instrument to which Company is a party or by which Company is bound
         (including Company's  Charter  or By-laws  as  a stock  life  insurance
         company,  or any order, rule or regulation of any court or governmental
         agency  or  body  having  jurisdiction  over  Company  or  any  of  its
         properties);
 
    (vii) There  is no consent, approval, authorization or order of any court or
          governmental agency or body required  for the consummation by  Company
          of the transactions contemplated by this Agreement, except such as may
          be  required  under  the  Securities Exchange  Act  of  1934  or state
          insurance or securities  laws in connection  with the distribution  of
          the Contracts; and
 
   (viii) There  are no  material legal  or governmental  proceedings pending to
          which Company  or the  Separate Account  is a  party or  of which  any
          property of Company or the Separate Account is the subject (other than
          as  set  forth  in  the  Prospectus  relating  to  the  Contracts,  or
          litigation incidental  to  the  kind  of  business  conducted  by  the
          Company) which, if determined adversely to Company, would individually
          or  in the aggregate  have a material adverse  effect on the financial
          position, surplus or operations of Company.
 
(b) Principal Underwriter represents and warrants to Company that:
 
     (i) It is a broker-dealer duly  registered with the Commission pursuant  to
         the  Securities Exchange Act of  1934, is a member  in good standing of
         the NASD, and is in compliance with the securities laws in those states
         in which it conducts business as a broker-dealer;
 
    (ii) As a  principal underwriter,  it shall  permit the  offer and  sale  of
         Contracts   to  the  public  only  by   and  through  persons  who  are
         appropriately licensed under the securities laws and who are  appointed
         in writing by the Company to be authorized insurance agents unless such
         persons are exempt from licensing and appointment requirements;
 
    (iii) The  performance  of  this  Agreement  and  the  consummation  of  the
          transactions herein  contemplated  will  not result  in  a  breach  or
          violation of any of the terms or provisions of or constitute a default
          under  any statute, indenture, mortgage, deed of trust, note agreement
          or other agreement or instrument  to which Principal Underwriter is  a
          party  or  by  which  Principal Underwriter  is  bound  (including the
          Certificate of Incorporation  or By-laws of  Principal Underwriter  or
          any  order, rule or regulation of  any court or governmental agency or
          body having  jurisdiction over  either  Principal Underwriter  or  its
          property); and
 
    (iv) To  the extent that any statements made in the Registration Statements,
         or any amendments or supplements thereto, are made in reliance upon and
         in  conformity  with  written  information  furnished  to  Company   by
         Principal  Underwriter expressly for use therein, such statements will,
         when they become  effective or are  filed with the  Commission, as  the
         case  may be, conform  in all material respects  to the requirements of
         the Securities  Act  of 1933  and  the  rules and  regulations  of  the
         Commission  thereunder, and will not contain  any untrue statement of a
         material fact or omit to state any material fact required to be  stated
         therein or necessary to make the statements therein not misleading.
 
    3.  BOOKS AND RECORDS
 
(a)  Principal Underwriter shall keep, in a  manner and form approved by Company
    and in accordance with Rules 17a-3  and 17a-4 under the Securities  Exchange
    Act  of  1934,  correct records  and  books  of account  as  required  to be
    maintained by a registered  broker-dealer, acting as principal  underwriter,
    of  all transactions entered into  on behalf of Company  with respect to its
    activities under  this  Agreement.  Principal Underwriter  shall  make  such
    records and books of account available for inspection by the Commission, and
    Company  shall have the right to inspect,  make copies of or take possession
    of such records and books of account at any time upon demand.
 
(b) Subject to  applicable Commission  or NASD restrictions,  Company will  send
    confirmations of Contract transactions to Contract Owners. Company will make
    such  confirmations  and  records  of  transactions  available  to Principal
    Underwriter upon request. Company will also maintain Contract Owner  records
    on  behalf of  Principal Underwriter to  the extent  permitted by applicable
    securities laws.
 
    4.  SALES MATERIALS
 
(a)  After  authorization  to  commence  the  activities  contemplated   herein,
    Principal  Underwriter  will  utilize  the  currently  effective  prospectus
    relating to  the  subject Contracts  in  connection with  its  underwriting,
    marketing   and   distribution  efforts.   As  to   other  types   of  sales
<PAGE>
    material,  Principal  Underwriter  hereby   agrees  and  will  require   any
    participating  or selling  broker-dealers to agree  that they  will use only
    sales materials which have been authorized for use by Company, which conform
    to the requirements  of federal and  state laws and  regulations, and  which
    have been filed where necessary with the appropriate regulatory authorities,
    including the NASD.
 
(b)  Principal Underwriter will not  distribute any prospectus, sales literature
    or any other printed matter or material in the underwriting and distribution
    of any Contract if,  to the knowledge of  Principal Underwriter, any of  the
    foregoing  misstates  the duties,  obligation or  liabilities of  Company or
    Principal Underwriter.
 
    5.  COMPENSATION
 
(a) Company agrees to pay Principal Underwriter for direct expenses incurred  on
    behalf  of Company. Such  direct expenses shall include,  but not be limited
    to, the costs of goods and  services purchased from outside vendors,  travel
    expenses  and  state  and  federal regulatory  fees  incurred  on  behalf of
    Company.
 
(b) Principal Underwriter shall present a statement after the end of the quarter
    showing the  apportionment  of services  rendered  and the  direct  expenses
    incurred. Settlements are due and payable within thirty days.
 
    6.  PURCHASE PAYMENTS
 
    Principal  Underwriter shall arrange that all purchase payments collected on
the sale of the Contracts are  promptly and properly transmitted to Company  for
immediate  allocation to the Separate Account  in accordance with the procedures
of Company and the directions furnished  by the purchasers of such Contracts  at
the time of purchase.
 
    7.  UNDERWRITING TERMS
 
(a)  Principal Underwriter makes no  representations or warranties regarding the
    number of Contracts  to be  sold by licensed  broker-dealers and  registered
    representatives  of  broker-dealers or  the  amount to  be  paid thereunder.
    Principal Underwriter does, however, represent that it will actively  engage
    in  its duties under  this Agreement on  a continuous basis  while there are
    effective registration statements with the Commission.
 
(b) Principal Underwriter will use its best efforts to ensure that the Contracts
    shall be  offered  for  sale by  registered  broker-dealers  and  registered
    representatives  (who are  duly licensed as  insurance agents)  on the terms
    described in the currently effective prospectus describing such Contracts.
 
(c) It is understood  and agreed that Principal  Underwriter may render  similar
    services to other companies in the distribution of other variable contracts.
 
(d)  The Company  will use  its best  efforts to  assure that  the Contracts are
    continuously registered  under the  Securities Act  of 1933  (and under  any
    applicable  state  "blue sky"  laws) and  to file  for approval  under state
    insurance laws when necessary.
 
(e) The Company reserves the  right at any time to  suspend or limit the  public
    offering of the subject Contracts upon one day's written notice to Principal
    Underwriter.
 
    8.  LEGAL AND REGULATORY ACTIONS
 
(a) The Company agrees to advise Principal Underwriter immediately of:
 
     (i) any  request  by  the  Commission  for  amendment  of  the Registration
         Statement or for additional information relating to the Contracts;
 
    (ii) the issuance  by  the  Commission  of any  stop  order  suspending  the
         effectiveness  of the Registration Statement  relating to the Contracts
         or the initiation of any proceedings for that purpose; and
 
    (iii) the happening  of any  known  material event  which makes  untrue  any
          statement made in the Registration Statement relating to the Contracts
          or  which requires the making of a change therein in order to make any
          statement made therein not misleading.
 
(b) Each of the undersigned parties agrees  to notify the other in writing  upon
    being  apprised  of  the  institution of  any  proceeding,  investigation or
    hearing involving the offer or sale of the subject Contracts.
 
(c) During  any legal  action  or inquiry,  Company  will furnish  to  Principal
    Underwriter  such  information  with  respect to  the  Separate  Account and
    Contracts in  such form  and signed  by such  of its  officers as  Principal
    Underwriter  may  reasonably request  and will  warrant that  the statements
    therein contained when so signed are true and correct.
 
    9.  TERMINATION
 
(a) This Agreement will terminate automatically upon its assignment.
 
(b) This Agreement shall terminate without the payment of any penalty by  either
    party upon sixty (60) days' advance written notice.
 
(c) This Agreement shall terminate at the option of the Company upon institution
    of  formal proceedings against  Principal Underwriter by the  NASD or by the
    Commission, or if Principal Underwriter or any representative thereof at any
    time:
 
     (i) employs any device, scheme, artifice, statement or omission to  defraud
         any person;
<PAGE>
    (ii) fails  to account  and pay  over promptly to  the Company  money due it
         according to the Company's records; or
 
    (iii) violates the conditions of this Agreement.
 
    10.  INDEMNIFICATION
 
    The Company agrees to indemnify Principal Underwriter for any liability that
it may incur to a Contract owner or party-in-interest under a Contract:
 
    (a) arising out of  any act or  omission in the course  of or in  connection
       with rendering services under this Agreement; or
 
    (b)  arising  out of  the purchase,  retention or  surrender of  a contract;
       provided,  however,  that  the  Company  will  not  indemnify   Principal
       Underwriter  for  any  such  liability  that  results  from  the  willful
       misfeasance, bad faith  or gross negligence  of Principal Underwriter  or
       from  the reckless disregard by such  Principal Underwriter of its duties
       and obligations arising under this Agreement.
 
    11.  GENERAL PROVISIONS
 
(a) This Agreement shall be subject to the laws of the State of Illinois.
 
(b) This Agreement, along  with any Schedules  attached hereto and  incorporated
    herein  by  reference,  may be  amended  from  time to  time  by  the mutual
    agreement and consent of the undersigned parties.
 
(c) In  case  any provision  in  this Agreement  shall  be invalid,  illegal  or
    unenforceable,  the validity,  legality and enforceability  of the remaining
    provisions shall not in way be affected or impaired thereby.
 
    IN WITNESS WHEREOF, the undersigned parties have caused this Agreement to be
duly executed, to be effective as of December 1, 1995.
 
GLENBROOK LIFE AND ANNUITY COMPANY
 (AND GLENBROOK LIFE AND ANNUITY COMPANY SEPARATE ACCOUNT A)
 
<TABLE>
<S>                                              <C>
BY:
 --------------------------------------------    ----------------------------------------------
  PRESIDENT AND CHIEF OPERATING OFFICER          Date
</TABLE>
 
ALLSTATE LIFE FINANCIAL SERVICES, INC.
 
<TABLE>
<S>                                              <C>
BY:
 --------------------------------------------    ----------------------------------------------
  PRESIDENT AND CHIEF EXECUTIVE OFFICER          Date
</TABLE>
 
<PAGE>
                                                                    ATTACHMENT A
 
                             UNDERWRITING AGREEMENT
 
<TABLE>
<CAPTION>
"CONTRACTS"                                                                            FORM #
- -----------------------------------------------------------  -----------------------------------------------------------
<S>                                                          <C>
AIM Lifetime Plus Variable Annuity                           GLMU Series per Selling Agreement Schedule
</TABLE>


<PAGE>
   

                                                                  EXHIBIT 23(a)




INDEPENDENT AUDITORS' CONSENT

We consent to the use in this Post-Effective Amendment No. 1 to Registration 
Statement No. 33-62193 on Form S-1, of our report dated March 1, 1996 
accompanying the financial statements and financial statement schedule of 
Glenbrook Life and Annuity Company, appearing in the Prospectus, and our 
report dated March 1, 1996 accompanying the financial statements of Glenbrook 
Life and Annuity Company Separate Account A, which is incorporated by 
reference in the Prospectus of Glenbrook Life and Annuity Company Separate 
Account A of Glenbrook Life and Annuity Company, and to the reference to us 
under the heading "Experts" in such Prospectus.



/s/ DELOITTE & TOUCHE LLP

Chicago, Illinois
March 21, 1996

    


<PAGE>
                                                 Exhibit No. (24)










                        POWERS OF ATTORNEY

<PAGE>



                        POWER OF ATTORNEY

      WITH RESPECT TO THE GLENBROOK LIFE AND ANNUITY COMPANY
              MARKET VALUE ADJUSTED ANNUITY CONTRACT

  Know all men by these presents that James P. Zils, whose signature appears 
below, constitutes and appoints Louis G. Lower, II, and Michael J. Velotta, 
and each of them, her attorneys-in-fact, with power of substitution, and him 
in any and all capacities, to sign any Form S-1 registration statements and 
amendments thereto for the Glenbrook Life and Annuity Company Market Value 
Adjusted Annuity Contract and to file the same, with exhibits thereto and 
other documents in connection therewith, with the Securities and Exchange 
Commission, hereby ratifying and confirming all that each of said 
attorneys-in-fact, or his substitute or substitutes, may do or cause to be 
done by virtue hereof.

                                       March 6, 1996 
                                       ---------------
                                       Date




                                       /s/JAMES P. ZILS
                                       ---------------------
                                          James P. Zils


<PAGE>




                        POWER OF ATTORNEY

      WITH RESPECT TO THE GLENBROOK LIFE AND ANNUITY COMPANY
              MARKET VALUE ADJUSTED ANNUITY CONTRACT

  Know all men by these presents that Casey J. Sylla, whose signature appears
below, constitutes and appoints Michael J. Velotta, his attorney-in-fact, with 
power of substitution, and his in any and all capacities, to sign any 
Form S-1 registration statements and amendments thereto for the Glenbrook Life 
and Annuity Company Market Value Adjusted Annuity and to file the same, with 
exhibits thereto and other documents in connection therewith, with the 
Securities and Exchange Commission, hereby ratifying and confirming all that 
each of said attorneys-in-fact, or his substitute or substitutes, may do or 
cause to be done by virtue hereof.




                                       March 5, 1996  
                                       ---------------
                                       Date




                                       /s/CASEY J. SYLLA     
                                       ---------------------
                                          Casey J. Sylla
                                          Chief Investment Officer and Director



<TABLE> <S> <C>

<PAGE>
<ARTICLE> 7
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARYFINANCIAL INFORMATION EXTRACTED FROM THE FINANCIAL
STATEMENT SCHEDULE AND FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1995
<PERIOD-START>                             JAN-01-1995
<PERIOD-END>                               DEC-31-1995
<DEBT-HELD-FOR-SALE>                             48815
<DEBT-CARRYING-VALUE>                                0
<DEBT-MARKET-VALUE>                                  0
<EQUITIES>                                           0
<MORTGAGE>                                           0
<REAL-ESTATE>                                        0
<TOTAL-INVEST>                                   50917
<CASH>                                             264
<RECOVER-REINSURE>                             1340925
<DEFERRED-ACQUISITION>                               0
<TOTAL-ASSETS>                                 1409705
<POLICY-LOSSES>                                      0
<UNEARNED-PREMIUMS>                                  0
<POLICY-OTHER>                                       0
<POLICY-HOLDER-FUNDS>                          1340925
<NOTES-PAYABLE>                                      0
                                0
                                          0
<COMMON>                                          2100
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<TOTAL-LIABILITY-AND-EQUITY>                   1409705
                                           0
<INVESTMENT-INCOME>                               3996
<INVESTMENT-GAINS>                                 459
<OTHER-INCOME>                                       0
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<INCOME-PRETAX>                                   4455
<INCOME-TAX>                                      1576
<INCOME-CONTINUING>                               2879
<DISCONTINUED>                                       0
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<CHANGES>                                            0
<NET-INCOME>                                      2879
<EPS-PRIMARY>                                   685.48
<EPS-DILUTED>                                   685.48
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</TABLE>


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