NORTHBROOK LIFE VARIABLE LIFE SEPARATE A
497, 1997-11-13
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                                      NORTHBROOK
                               VARIABLE LIFE INSURANCE
                     ISSUED BY NORTHBROOK LIFE INSURANCE COMPANY

                                      PROSPECTUS
                                DATED OCTOBER 1, 1997




                                     DEAN WITTER
                              VARIABLE INVESTMENT SERIES
                                           

                                      PROSPECTUS
                                  DATED MAY 1, 1997


                                        [LOGO]
<PAGE>
                       NORTHBROOK LIFE INSURANCE COMPANY
 
                            MODIFIED SINGLE PREMIUM
 
                        VARIABLE LIFE INSURANCE CONTRACT
                               3100 SANDERS ROAD
                              NORTHBROOK, IL 60062
 
                            TELEPHONE (800) 654-2397
 
                              -------------------
 
This prospectus describes the "Dean Witter Variable Life," a modified single
premium variable life insurance contract ("Contract") offered by Northbrook Life
Insurance Company (the "Company") for prospective insured persons age 0-85. The
Contract lets the Contract Owner pay a significant single premium and subject to
restrictions, additional premiums.
 
The Contracts are modified endowment contracts for federal income tax purposes,
except in certain cases described under "Federal Tax Matters," page 20. A LOAN,
DISTRIBUTION OR OTHER AMOUNT RECEIVED FROM A MODIFIED ENDOWMENT CONTRACT DURING
THE LIFE OF THE INSURED WILL BE TAXED TO THE EXTENT OF ANY ACCUMULATED INCOME IN
THE CONTRACT. ANY AMOUNTS THAT ARE TAXABLE WITHDRAWALS WILL BE SUBJECT TO A 10%
PENALTY, WITH CERTAIN EXCEPTIONS.
 
The minimum initial premium the Company will accept is $10,000. Premiums are
allocated to Northbrook Life Variable Life Separate Account A ("Variable
Account"). The Variable Account invests exclusively in shares of the Dean Witter
Variable Investment Series (the "Fund") a mutual fund managed by Dean Witter
InterCapital Inc., a wholly owned subsidiary of Morgan Stanley, Dean Witter,
Discover & Co.
 
The Fund has thirteen available Portfolios: (1) Money Market (2) Quality Income
Plus (3) High Yield (4) Utilities (5) Income Builder (6) Dividend Growth (7)
Capital Growth (8) Global Dividend Growth (9) European Growth (10) Pacific
Growth (11) Capital Appreciation (12) Equity and (13) Strategist.
 
There is no guaranteed minimum Account Value for a Contract. The Account Value
of a Contract will vary up or down to reflect the investment experience of the
Portfolios to which premiums have been allocated. The Contract Owner bears the
investment risk for all amounts so allocated. The Contract continues in effect
while the Cash Surrender Value is sufficient to pay the monthly charges under
the Contract ("Monthly Deduction Amount").
 
The Contracts provide for an Initial Death Benefit shown on the Contract Data
page. The death benefit ("Death Benefit") payable under a Contract may be
greater than the Initial Death Benefit but so long as the Contract continues in
effect, if no withdrawals or loans are made, will never be less than the Initial
Death Benefit. The Account Value will, and under certain circumstances the Death
Benefit of the Contract may, increase or decrease based on the investment
experience of the Portfolios to which premiums have been allocated. At the death
of the Insured, we will pay a Death Benefit to the beneficiary.
 
IT MAY NOT BE ADVANTAGEOUS TO PURCHASE VARIABLE LIFE INSURANCE AS A REPLACEMENT
FOR YOUR CURRENT LIFE INSURANCE OR IF YOU ALREADY OWN A VARIABLE LIFE INSURANCE
                                   CONTRACT.
 
 THIS PROSPECTUS IS VALID ONLY IF ACCOMPANIED BY THE CURRENT PROSPECTUS FOR THE
FUND WHICH CONTAINS A FULL DESCRIPTION OF THE PORTFOLIOS. THE PROSPECTUS SHOULD
                   BE READ AND RETAINED FOR FUTURE REFERENCE.
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
                               CRIMINAL OFFENSE.
 
 THE PRODUCTS DESCRIBED HEREIN ARE NOT DEPOSITS OF, OR GUARANTEED BY, ANY BANK,
 NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE
 BOARD OR ANY OTHER AGENCY, AND ARE SUBJECT TO INVESTMENT RISKS, INCLUDING THE
                POSSIBLE LOSS OF THE PRINCIPAL AMOUNT INVESTED.
 
                THE DATE OF THIS PROSPECTUS IS OCTOBER 1, 1997.
<PAGE>
               THE CONTRACTS MAY NOT BE AVAILABLE IN ALL STATES.
 
THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFERING IN ANY JURISDICTION IN WHICH
SUCH OFFERING MAY NOT BE LAWFULLY MADE. NO DEALER 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.
 
                               TABLE OF CONTENTS
 
Summary.....................................................      3
Special Terms...............................................      5
The Company.................................................      6
The Variable Account........................................      6
  General...................................................      6
  Fund......................................................      7
The Contract................................................      8
  Application for a Contract................................      8
  Premiums..................................................      8
  Allocation of Premiums....................................      9
  Accumulation Unit Values..................................      9
Deductions and Charges......................................     10
  Monthly Deductions........................................     10
    Cost of Insurance Charge................................     10
    Tax Expense Charge......................................     10
    Administrative Expense Charge...........................     10
  Other Deductions..........................................     11
    Mortality and Expense Risk Charge.......................     11
    Annual Maintenance Fee..................................     11
    Taxes Charged Against the Variable Account..............     11
    Charges Against the Fund................................     11
    Withdrawal Charge.......................................     11
    Due and Unpaid Premium Tax Charge.......................     11
Contract Benefits and Rights................................     12
  Death Benefit.............................................     12
  Accelerated Death Benefit.................................     12
  Account Value.............................................     13
  Transfer of Account Value.................................     13
  Dollar Cost Averaging.....................................     13
  Contract Loans............................................     13
  Amount Payable on Surrender of the Contract...............     14
  Partial Withdrawals.......................................     14
  Maturity..................................................     14
  Lapse and Reinstatement...................................     14
  Cancellation and Exchange Rights..........................     15
  Confinement Waiver Benefit................................     15
  Suspension of Valuation, Payments and Transfers...........     15
  Last Survivor Contracts...................................     15
Other Matters...............................................     16
  Voting Rights.............................................     16
  Statements to Contract Owners.............................     16
  Limit on Right to Contest.................................     17
  Misstatement as to Age and Sex............................     17
  Payment Options...........................................     17
Beneficiary.................................................     17
Assignment..................................................     17
Dividends...................................................     17
Executive Officers and Directors of the Company.............     18
Distribution of the Contracts...............................     19
Safekeeping of the Variable Account's Assets................     19
Federal Tax Matters.........................................     20
  Introduction..............................................     20
  Taxation of the Company and the Variable Account..........     20
  Taxation of Contract Benefits.............................     20
  Modified Endowment Contracts..............................     21
  Diversification Requirements..............................     21
  Ownership Treatment.......................................     21
  Policy Loan Interest......................................     22
Additional Information About the Company....................     22
Legal Proceedings...........................................     22
Legal Matters...............................................     22
Registration Statement......................................     22
Experts.....................................................     23
Financial Information.......................................     23
Financial Statements........................................     F-1
Appendix A..................................................     A-1
 
                                       2
<PAGE>
SUMMARY
- -----------------------------------------------------------
 
NOTE: A GLOSSARY OF SPECIAL TERMS USED IN THIS PROSPECTUS APPEARS AT PAGE 5,
IMMEDIATELY FOLLOWING THIS SUMMARY.
 
THE CONTRACT
 
The Contracts are life insurance contracts with death benefits, cash values, and
other traditional life insurance features. The Contracts are "variable." Unlike
the fixed benefits of ordinary whole life insurance, the Account Value will
increase or decrease based on the investment experience of the investment
Portfolios of the Fund to which premiums have been allocated. Similarly, the
Death Benefit may increase or decrease under some circumstances, but so long as
the Contract remains in effect it will not decrease below the Initial Death
Benefit if no withdrawals or loans are made. The Contracts are credited with
units ("Accumulation Units") to calculate cash values. The Contract Owner may
transfer the Account Value among the Variable Account's underlying investment
Portfolios.
 
The Contracts can be issued on a single life or "last survivor" basis. For a
discussion of how last survivor Contracts operate differently from single life
Contracts, see "Last Survivor Contracts," page 15.
 
In some states, the Contracts may be issued in the form of a group Contract. In
those states, certificates will be issued evidencing a purchaser's rights under
the group Contract. The terms "Contract" and "Contract Owner", as used in this
Prospectus, refer to and include such a certificate and certificate owner,
respectively.
 
THE VARIABLE ACCOUNT AND THE FUND
 
The Northbrook Life Variable Life Separate Account A ("Variable Account") funds
the variable life insurance Contracts offered by this prospectus. The Variable
Account is a unit investment trust registered as such under the Investment
Company Act of 1940. It consists of multiple sub-accounts ("Variable
Sub-Accounts"), each investing in a corresponding Fund Portfolio.
 
Applicants should read the prospectus for the Fund in connection with the
purchase of a Contract. The investment objectives of the Fund Portfolios are
briefly summarized below under "Fund," page 7.
 
The Variable Account invests in shares of the Dean Witter Variable Investment
Series (the "Fund"). The Fund has thirteen available Portfolios: (1) Money
Market (2) Quality Income Plus (3) High Yield (4) Utilities (5) Income Builder
(6) Dividend Growth (7) Capital Growth (8) Global Dividend Growth (9) European
Growth (10) Pacific Growth (11) Capital Appreciation (12) Equity and (13)
Strategist.
 
The assets of each Portfolio are accounted for separately from the other
Portfolios and each has distinct investment objectives and policies which are
described in the accompanying prospectus for the Fund.
 
PREMIUMS
 
The Contract requires the Contract Owner to pay an initial premium of at least
$10,000. Additional premium payments may be made at any time, subject to the
following conditions:
 
    - only one payment is allowed in any Contract Year;
 
    - the minimum payment is $500;
 
    - the attained age of the insured must be less than age 91; and
 
    - absent submission of new evidence of insurability of the insured, the
      maximum additional payment permitted in a Contract Year is the "Guaranteed
      Additional Payment." The Guaranteed Additional Payment is the lesser of
      $5,000 or a percentage of the initial payment (5% for attained ages 40-70,
      and 0% for attained ages 20-39 and 71-90).
 
THE COMPANY RESERVES THE RIGHT TO OBTAIN SATISFACTORY EVIDENCE OF INSURABILITY
BEFORE ACCEPTING ANY ADDITIONAL PREMIUM PAYMENTS REQUIRING AN INCREASE IN
SPECIFIED AMOUNT. WE ALSO RESERVE THE RIGHT TO REJECT AN ADDITIONAL PREMIUM
PAYMENT FOR ANY REASON.
 
Additional premium payments may require an increase in the Specified Amount in
order for the Contract to meet the definition of a life insurance contract under
the Internal Revenue Code. Additional Premiums may also be paid at any time and
in any amount necessary to avoid termination of the Contract.
 
DEDUCTIONS AND CHARGES
 
On each Monthly Activity Date, the Company will deduct a Monthly Deduction
Amount from the Account Value. The Monthly Deduction Amount will be made pro
rata respecting each Variable Sub-Account to which Account Value is allocated.
The Monthly Deduction Amount includes a cost of insurance charge, tax expense
charge and an administrative expense charge. The monthly cost of insurance
charge is to cover the Company's anticipated mortality costs. In addition, the
Company will deduct
 
                                       3
<PAGE>
monthly from the Account Value a tax expense charge equal to an annual rate of
0.40% for the first ten Contract Years. This charge compensates the Company for
premium taxes imposed by various states and local jurisdictions and for federal
taxes resulting from the application of Section 848 of the Code. The charge
includes a premium tax deduction of 0.25% and a federal tax deduction of 0.15%.
The premium tax deduction represents an average premium tax of 2.5% of premiums
over ten years. The Company will deduct from the Account Value a monthly
administrative charge equal to an annual rate of 0.25%. This charge compensates
the Company for administrative expenses incurred in the administration of the
Variable Account and the Contracts. The Company will also deduct from the
Variable Account a daily charge equal to an annual rate of 0.90% for the
mortality risks and expense risks the Company assumes in relation to the
Contracts. If the Cash Surrender Value is not sufficient to cover a Monthly
Deduction Amount due on any Monthly Activity Date, the Contract may lapse. See
"Deductions and Charges--Monthly Deductions," page 10, and "Contract Benefits
and Rights--Lapse and Reinstatement," page 14.
 
An Annual Maintenance Fee of $30 will be deducted on each Contract Anniversary
from all Variable Sub-Accounts to which Account Value is allocated, in
proportion to the amounts so allocated. This fee will help reimburse the Company
for administrative and maintenance costs of the Contracts. Currently, this
charge is waived for Contracts which have an aggregate premium which equals or
exceeds the dollar amount indicated on your Contract data page. See "Deductions
and Charges--Other Deductions-- Annual Maintenance Fee," page 11.
 
Certain fees and charges are associated with investments in the Fund. Applicants
should review the prospectus for the Fund which accompanies this prospectus for
a complete description of the charges and expenses borne by the Fund in
connection with its operations. See "Deductions and Charges--Fund Expenses,"
page 11.
 
Withdrawals in excess of the Free Withdrawal Amount will be subject to a
withdrawal charge as set forth below:
 
<TABLE>
<CAPTION>
                                                   PERCENTAGE
                                                       OF
                                                    INITIAL
                                                    PREMIUM
CONTRACT YEAR                                      WITHDRAWN
- ------------------------------------------------  ------------
<S>                                               <C>
1...............................................     7.75%
2...............................................     7.75%
3...............................................     7.75%
4...............................................     7.25%
5...............................................     6.25%
6...............................................     5.25%
7...............................................     4.25%
8...............................................     3.25%
9...............................................     2.25%
10+.............................................     0.00%
</TABLE>
 
The withdrawal charge is imposed to cover a portion of the sales expense
incurred by the Company in distributing the Contracts. This expense includes
agents' commissions, advertising and the printing of prospectuses. See
"Deductions and Charges--Other Deductions--Withdrawal Charge," page 11. See
"Deductions and Charges," page 10 and "Withdrawal Charge," page 11.
 
During the first nine Contract Years, an additional premium tax charge will be
imposed on full or partial withdrawals.
 
<TABLE>
<CAPTION>
                                                   PERCENTAGE
                                                       OF
                                                    INITIAL
                                                    PREMIUM
YEAR                                               WITHDRAWN
- ------------------------------------------------  ------------
<S>                                               <C>
1...............................................     2.25%
2...............................................     2.00%
3...............................................     1.75%
4...............................................     1.50%
5...............................................     1.25%
6...............................................     1.00%
7...............................................     0.75%
8...............................................     0.50%
9...............................................     0.25%
10+.............................................     0.00%
</TABLE>
 
No withdrawal charge will be imposed on any withdrawal to the extent that
aggregate withdrawal charges and the federal tax portion of the tax expense
charge imposed would otherwise exceed 9% of total premiums paid prior to the
withdrawal.
 
See "Deductions and Charges--Other Deductions--Due and Unpaid--Premium Tax
Charge," page 11. For a discussion of the tax consequences of a full or a
partial withdrawal, see "Federal Tax Matters," page 20.
 
DEATH BENEFIT
 
At the death of the Insured while the Contract is in force, we will pay the
Death Benefit (less any Indebtedness and certain due and unpaid Monthly
Deduction Amounts) to the beneficiary. The Death Benefit determined on the date
of the Insured's death is the greater of (1) the Specified Amount, or (2) the
Account Value multiplied by the death benefit ratio as found in the Contract.
See "Contract Benefits and Rights--Death Benefit," page 12.
 
ACCOUNT VALUE
 
The Account Value of the Contract will increase or decrease to reflect (1) the
investment experience of the Fund Portfolios underlying the Variable Sub-Account
to which Account Value is allocated, and (2) deductions for the mortality and
expense risk charge, the Monthly Deduction Amount, and the annual maintenance
fee. There is no minimum guaranteed Account Value and the Contract Owner bears
the risk of the investment in the Fund Portfolios. See "Contract Benefits and
Rights--Account Value," page 13.
 
                                       4
<PAGE>
CONTRACT LOANS
 
A Contract Owner may obtain one or both of two types of cash loans from the
Company. Both types of loans are secured by the Contract. The maximum amount
available for such loans is 90% of the Contract's Cash Value, less the amount of
all loans existing on the date of the loan request (including loan interest to
the next Contract Anniversary), less any annual maintenance fee due on or before
the next Contract Anniversary, and less any due and unpaid Monthly Deduction
Amounts. See "Contract Benefits and Rights--Contract Loans," page 13.
 
LAPSE
 
Under certain circumstances a Contract may terminate if the Cash Surrender Value
on any Monthly Activity Date is less than the required Monthly Deduction Amount.
The Company will give written notice to the Contract Owner and a 61 day grace
period during which additional amounts may be paid to continue the Contract. See
"Contract Benefits and Rights--Contract Loans," page 13 and "Lapse and
Reinstatement," page 14.
 
CANCELLATION AND EXCHANGE RIGHTS
 
A Contract Owner has a limited right to return his or her Contract for
cancellation. This right to return exists during the free-look period. The
free-look period is a number of days (which varies by state) as specified in
your Contract. If the Contract Owner returns the Contract for cancellation, by
mail or hand delivery, to the Account Executive who sold the Contract, within
the free-look period following delivery of the Contract to the Contract Owner,
the Company will return to the Contract Owner within 7 days thereafter the
premiums paid for the Contract adjusted to reflect any investment gain or loss
resulting from allocation to the Variable Account prior to the date of
cancellation, unless state law requires a return of premium without such
adjustments. In those states where the Company is required to return the
premiums paid upon a free-look of the Contract and where it has been approved by
the state, the Company reserves the right to allocate all premium payments made
prior to the expiration of the free-look period to the Money Market sub-account
of the Variable Account.
 
In addition, once the Contract is in effect it may be exchanged during the first
24 months after its issuance for a permanent life insurance contract on the life
of the Insured without submitting proof of insurability. See "Contract Benefits
and Rights--Cancellation and Exchange Rights," page 15.
 
TAX CONSEQUENCES
 
The current Federal tax law generally excludes all death benefit payments from
the gross income of the Contract beneficiary. The Contracts generally will be
treated as modified endowment contracts. This status does not affect the
Contracts' classification as life insurance, nor does it affect the exclusion of
death benefit payments from gross income. However, loans, distributions or other
amounts received under a modified endowment contract are taxed to the extent of
accumulated income in the Contract (generally, the excess of Account Value over
premiums paid) and may be subject to a 10% penalty tax. See "Federal Tax
Matters," page 20.
 
SPECIAL TERMS
- -----------------------------------------------------------
 
As used in this prospectus, the following terms have the indicated meanings:
 
    ACCOUNT VALUE--The aggregate value under a Contract of the Variable
Sub-Accounts and the Loan Account.
 
    ACCUMULATION UNIT--An accounting unit of measure used to calculate the value
of a Variable Sub-Account.
 
    AGE--The Insured's age at the Insured's last birthday.
 
    CASH VALUE--The Account Value less any applicable withdrawal charges and due
and unpaid premium tax charges.
 
    CASH SURRENDER VALUE--The Cash Value less all Indebtedness and the annual
maintenance fee, if applicable.
 
    CODE--The Internal Revenue Code of 1986, as amended.
 
    CONTRACT ANNIVERSARY--The same day and month as the Contract Date for each
subsequent year the Contract remains in force.
 
    CONTRACT DATE--The date on or as of which coverage under a Contract becomes
effective and the date from which Contract Anniversaries, Contract Years and
Contract months are determined.
 
    CONTRACT OWNER--The person having rights to benefits under the Contract
during the lifetime of the Insured; the Contract Owner may or may not be the
Insured.
 
    CONTRACT YEARS--Annual periods computed from the Contract Date.
 
    DEATH BENEFIT--The greater of (1) the Specified Amount or (2) the Account
Value on the date of death multiplied by the death benefit ratio as specified in
the Contract.
 
                                       5
<PAGE>
    FREE WITHDRAWAL AMOUNT--The amount of a surrender or partial withdrawal that
is not subject to a withdrawal charge. This amount in any Contract Year is 15%
of total premiums paid.
 
    INITIAL DEATH BENEFIT--The Initial Death Benefit under a Contract is shown
on the Contract data page.
 
    FUND--The Dean Witter Variable Investment Series
 
    INDEBTEDNESS--All Contract loans, if any, and accrued loan interest.
 
    INSURED--The person whose life is insured under a Contract.
 
    LOAN ACCOUNT--An account in the Company's general account, established for
any amounts transferred from the Variable Sub-Accounts for requested loans. The
Loan Account credits a fixed rate of interest that is not based on the
investment experience of the Variable Account.
 
    MONTHLY ACTIVITY DATE--The day of each month on which the Monthly Deduction
Amount is deducted from the Account Value of the Contract. Monthly Activity
Dates occur on the same day of the month as the Contract Date. If there is no
date equal to the Monthly Activity Date in a particular month, the Monthly
Activity Date will be the last day of that month.
 
    MONTHLY DEDUCTION AMOUNT--A deduction on each Monthly Activity Date for the
cost of insurance charge, a tax expense charge and an administrative expense
charge.
 
    SPECIFIED AMOUNT--The minimum Death Benefit under a Contract, equal to the
Initial Death Benefit on the Contract Date. Thereafter it may change in
accordance with the terms of the partial withdrawal and the subsequent premium
provisions of the Contract.
 
    VALUATION DAY--Every day the New York Stock Exchange is open for trading.
The value of the Variable Account is determined at the close of regular trading
on the New York Stock Exchange (currently 4:00 p.m. Eastern Time) on such days.
 
    VALUATION PERIOD--The period between the close of regular trading on the New
York Stock Exchange on successive Valuation Days.
 
    VARIABLE ACCOUNT--Northbrook Life Variable Life Separate Account A, an
account established by the Company to separate the assets funding the Contracts
from other assets of the Company.
 
    VARIABLE SUB-ACCOUNT--The subdivisions of the Variable Account used to
allocate a Contract Owner's Account Value, less Indebtedness, among the
Portfolios of the Fund.
 
THE COMPANY
- -----------------------------------------------------------
 
The Company is the issuer of the Contract. Incorporated in 1978 as a stock life
insurance company under the laws of the State of Illinois. The Company is
licensed to operate in the District of Columbia, all states (except New York)
and Puerto Rico. 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").
 
THE VARIABLE ACCOUNT
- -----------------------------------------------------------
 
GENERAL
 
Northbrook Life Variable Life Separate Account A ("Variable Account") is a
separate account of the Company established on January 15, 1996 pursuant to the
insurance laws of the State of Illinois. The Variable Account is organized as a
unit investment trust and registered as such with the Securities and Exchange
Commission under the Investment Company Act of 1940. The Variable Account meets
the definition of "separate account" under federal securities law. Under
Illinois law, the assets of the Variable Account are held exclusively for the
benefit of Contract Owners
 
                                       6
<PAGE>
and persons entitled to payments under the Contracts. The assets of the Variable
Account are not chargeable with liabilities arising out of any other business
which the Company may conduct.
 
FUND
 
The Variable Account will invest in shares of the Dean Witter Variable
Investment Series (the "Fund"). The Fund is registered with the Securities and
Exchange Commission as an open-end, series, management investment company.
Registration of the Fund does not involve supervision of its management,
investment practices or policies by the Securities and Exchange Commission. The
Fund Portfolios are designed to provide investment vehicles for variable
insurance contracts of various insurance companies, in addition to the Variable
Account. The Fund Portfolios available for investment by the Variable Account
are listed below:
 
THE MONEY MARKET PORTFOLIO seeks high current income, preservation of capital,
and liquidity by investing in certain money market instruments, principally U.S.
government securities, bank obligations, and high grade commercial paper.
 
THE QUALITY INCOME PLUS PORTFOLIO seeks, as its primary objective, to earn a
high level of current income and, as a secondary objective, capital
appreciation, but only when consistent with its primary objective, by investing
primarily in debt securities issued by the U.S. Government, its agencies and
instrumentalities, including zero coupon securities and in fixed-income
securities rated A or higher by Moody's Investors Service, Inc. ("Moody's") or
Standard & Poor's Corporation ("Standard & Poor's") or non-rated securities of
comparable quality, and by writing covered call and put options against such
securities.
 
THE HIGH YIELD PORTFOLIO seeks, as its primary objective, to earn a high level
of current income by investing in a professionally managed diversified portfolio
consisting principally of fixed-income securities rated Baa or lower by Moody's
or BBB or lower by Standard & Poor's or non-rated securities of comparable
quality, which are commonly known as junk bonds, and, as a secondary objective,
capital appreciation when consistent with its primary objective. The risks of
investing in junk bonds are discussed in the accompanying prospectus for the
Fund, which should be read carefully before investing.
 
THE UTILITIES PORTFOLIO seeks to provide current income and long-term growth of
income and capital by investing primarily in equity and fixed-income securities
of companies engaged in the public utilities industry.
 
THE INCOME BUILDER PORTFOLIO seeks, as its primary objective, reasonable income
by investing primarily in common stock of large-cap companies which have a
record of paying dividends and the potential for maintaining dividends, in
preferred stock and in securities convertible into common stocks of small and
mid-cap companies and, as its secondary objective, growth of capital.
 
THE DIVIDEND GROWTH PORTFOLIO seeks to provide reasonable current income and
long-term growth of income and capital by investing primarily in common stock of
companies with a record of paying dividends and the potential for increasing
dividends.
 
THE CAPITAL GROWTH PORTFOLIO seeks to provide long-term capital growth by
investing principally in common stocks.
 
THE GLOBAL DIVIDEND GROWTH PORTFOLIO seeks to provide reasonable current income
and long-term growth of income and capital by investing primarily in common
stock of companies, issued by issuers worldwide, with a record of paying
dividends and the potential for increasing dividends.
 
THE EUROPEAN GROWTH PORTFOLIO seeks to maximize the capital appreciation on its
investments by investing primarily in securities issued by issuers located in
Europe.
 
THE PACIFIC GROWTH PORTFOLIO seeks to maximize the capital appreciation of its
investments by investing primarily in securities issued by issuers located in
Asia, Australia and New Zealand.
 
THE CAPITAL APPRECIATION PORTFOLIO seeks long-term capital appreciation by
investing primarily in common stocks of U.S. companies that offer the potential
for either superior earnings growth and/or appear to be undervalued.
 
THE EQUITY PORTFOLIO seeks, as its primary objective, growth of capital through
investments in common stock of companies believed by the Investment Manager to
have potential for superior growth and, as a secondary objective, income when
consistent with its primary objective.
 
THE STRATEGIST PORTFOLIO seeks a high total investment return through a fully
managed investment policy utilizing equity securities, fixed-income securities
rated Baa or higher by Moody's or BBB or higher by Standard & Poor's (or
non-rated securities of comparable quality), and money market securities, and
the writing of covered options on such securities and the collateralized sale of
stock index options.
 
Dean Witter InterCapital Inc. ("InterCapital"), Two World Trade Center, New
York, New York 10048, is the Fund's Investment Manager. InterCapital is a wholly
owned subsidiary of Morgan Stanley, Dean Witter, Discover & Co.
 
Shares of the Fund 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 Fed-
eral Reserve Board or any other agency.
 
An investment in the Money Market Portfolio is neither insured nor guaranteed by
the U.S. Government. There can be no assurance that the Money Market Portfolio
will be able to maintain a stable net asset value of $1.00 per share.
 
All dividends and capital gains distributions from the Portfolios are
automatically reinvested in shares of the distributing Portfolio at their net
asset value.
 
                                       7
<PAGE>
There is no assurance that the Portfolios will attain their respective stated
objectives. Additional information concerning the investment objectives and
policies of the Portfolios can be found in the current prospectus for the Fund
accompanying this prospectus.
 
You will find more complete information about the Portfolios, including the
risks associated with each Portfolio, in the accompanying prospectus for the
Fund. You should read the prospectus for the Fund in conjunction with this
prospectus.
 
THE FUND'S PROSPECTUS SHOULD BE READ CAREFULLY BEFORE ANY DECISION IS MADE
CONCERNING THE ALLOCATION OF PURCHASE PAYMENTS TO A PARTICULAR VARIABLE
SUB-ACCOUNT.
 
It is conceivable that in the future it may be disadvantageous for variable life
insurance separate accounts and variable annuity separate accounts to invest in
a Fund simultaneously. Although neither the Company nor the Fund currently
foresees any such disadvantages either to variable life insurance or variable
annuity contract owners, the Fund's Board of Directors intends to monitor events
in order to identify any material conflicts between variable life and variable
annuity contract owners and to determine what action, if any, should be taken in
response thereto. If the Board of Directors were to conclude that separate funds
should be established for variable life and variable annuity separate accounts,
the Company will bear the attendant expenses.
 
All investment income of and other distributions to each Variable Sub-Account
arising from the corresponding Portfolio are reinvested in shares of that
Portfolio at net asset value. The income and both realized and unrealized gains
or losses on the assets of each Variable Sub-Account are therefore separate and
are credited to or charged against the Variable Sub-Account without regard to
income, gains or losses from any other Variable Sub-Account or from any other
business of the Company. The Company will purchase shares in the Fund in
connection with premiums allocated to the corresponding Variable Sub-Account in
accordance with Contract Owners' directions and will redeem shares in the Fund
to meet Contract obligations or make adjustments in reserves, if any.
 
The Company reserves the right, subject to compliance with the law as then in
effect, to make additions to, deletions from, or substitutions for the Fund
shares underlying the Variable Sub-Accounts. If shares of the Fund should no
longer be available for investment, or if, in the judgment of the Company's
management, further investment in shares of the Fund should become inappropriate
in view of the purposes of the Contracts, the Company may substitute shares of
another Fund for shares already purchased, or to be purchased in the future,
under the Contracts. No substitution of securities will take place without
notice to Contract Owners and without prior approval of the Securities and
Exchange Commission to the extent required by the Investment Company Act of 1940
("1940 Act"). The Company reserves the right to establish additional Variable
Sub-accounts of the Variable Account, each of which would invest in shares of
another Fund. Subject to Contract Owner approval, the Company also reserves the
right to end the registration under the 1940 Act of the Variable Account or any
other separate accounts of which it is the depositor or to operate the Variable
Account as a management company under the 1940 Act.
 
The Fund is subject to certain investment restrictions and policies which may
not be changed without the approval of a majority of the shareholders of the
Fund. See the accompanying prospectus for the Fund for further information.
 
THE CONTRACT
- -----------------------------------------------------------
 
APPLICATION FOR A CONTRACT
 
Individuals wishing to purchase a Contract must submit an application to the
Company. A Contract will be issued only on the lives of Insureds age 0-85 who
supply evidence of insurability satisfactory to the Company. Acceptance is
subject to the Company's underwriting rules and the Company reserves the right
to reject an application for any lawful reason. No change in the terms or
conditions of a Contract will be made without the consent of the Contract Owner.
 
Applications must be submitted and approved prior to the payment of initial
premium. The Insured will be covered under the Contract as of the Contract Date.
In addition to determining when coverage begins, the Contract Date determines
Monthly Activity Dates, Contract months, and Contract Years.
 
PREMIUMS
 
The Contract is designed to permit an initial premium payment and, subject to
certain conditions, additional premium payments. The initial premium payment
purchases a Death Benefit initially equal to the Contract's Specified Amount.
The minimum initial payment is $10,000.
 
Under current underwriting rules, which are subject to change, proposed Insureds
are eligible for simplified underwriting without a medical examination if their
application responses and anticipated initial premium payment meet simplified
underwriting standards. Customary underwriting standards will apply to all
 
                                       8
<PAGE>
other proposed Insureds. The maximum initial premium currently permitted on a
simplified underwriting basis varies with the issue age of the insured according
to the following table:
 
<TABLE>
<CAPTION>
                                       SIMPLIFIED UNDERWRITING
ISSUE AGE                              MAXIMUM INITIAL PREMIUM
- -------------------------------------  ------------------------
<S>                                    <C>
0-34.................................        Not available
35-44................................       $       15,000
45-54................................       $       30,000
55-64................................       $       50,000
65-80................................       $      100,000
Over age 80..........................        Not available
</TABLE>
 
Additional premium payments may be made at any time, subject to the following
conditions:
 
    - only one additional premium payment may be made in any Contract Year;
 
    - each additional premium payment must be at least $500;
 
    - the attained age of the Insured must be less than age 91; and
 
    - absent submission of new evidence of insurability of the insured, the
      maximum additional payment permitted in a Contract Year is the "Guaranteed
      Additional Payment."
 
    - the Guaranteed Additional Payment is the lesser of $5,000 or a percentage
      of the initial payment (5% for attained ages 40-70, and 0% for attained
      ages 20-39 and 71-90).
 
THE COMPANY RESERVES THE RIGHT TO OBTAIN SATISFACTORY EVIDENCE OF INSURABILITY
UPON ANY ADDITIONAL PREMIUM PAYMENTS REQUIRING AN INCREASE IN SPECIFIED AMOUNT.
WE ALSO RESERVE THE RIGHT TO REJECT ANY ADDITIONAL PREMIUM PAYMENT FOR ANY
REASON.
 
Additional premium payments may require an increase in Specified Amount in order
for the Contract to remain within the definition of a life insurance contract
under Section 7702 of the Code.
 
Unless you request otherwise in writing, any additional premium payment received
while a Contract loan exists will be applied: first, as a repayment of
Indebtedness, and second, as an additional premium payment, subject to the
conditions described above.
 
Additional premiums may be paid at any time and in any amount necessary to avoid
termination of the Contract without evidence of insurability.
 
ALLOCATION OF PREMIUMS
 
Upon completion of underwriting, the Company will either issue a Contract, or
deny coverage. If a Contract is issued, the initial premium payment will be
allocated on the date the Contract is issued according to the initial premium
allocation instructions specified on the application. The Company reserves the
right to allocate the initial premium to the Money Market Sub-Account during the
free look period in those states where state law requires premiums to be
returned upon exercise of the free-look right.
 
ACCUMULATION UNIT VALUES
 
The Accumulation Unit value for each Variable Sub-Account will vary to reflect
the investment experience of the corresponding Fund Portfolio and will be
determined on each Valuation Day by multiplying the Accumulation Unit value of
the particular Variable Sub-Account on the preceding Valuation Day by a "Net
Investment Factor" for that Sub-Account for the Valuation Period then ended. The
Net Investment Factor for each Variable Sub-Account is determined by first
dividing (A) the net asset value per share of the corresponding Fund Portfolio
at the end of the current Valuation Period (plus the per share dividends or
capital gains by that Fund Portfolio if the ex-dividend date occurs in the
Valuation Period then ended), by (B) the net asset value per share of the
corresponding Fund Portfolio at the end of the immediately preceding Valuation
Period; and then subtracting from the result an amount equal to the daily
deductions for mortality and expense risk charges imposed during the Valuation
Period. Applicants should refer to the prospectus for the Fund which accompanies
this prospectus for a description of how the assets of the Fund are valued since
such determination has a direct bearing on the Accumulation Unit value of the
corresponding Sub-Account and therefore the Account Value of a Contract. See
"Contract Benefits and Rights--Account Value," page 13.
 
All valuations in connection with a Contract, e.g., with respect to determining
Account Value and Cash Surrender Value and in connection with Contract loans, or
calculation of Death Benefits, or with respect to determining the number of
Accumulation Units to be credited to a Contract with each premium, other than
the initial premium and additional premiums requiring underwriting, will be made
on the date the request or payment is received in good order by the Company at
its Home Office if such date is a Valuation Day; otherwise such determination
will be made on the next succeeding date which is a Valuation Day.
 
Specialized Uses of the Contract: Because the Contract provides for an
accumulation of Cash Value as well as a Death Benefit, the Contract can be used
for various individual and business financial planning purposes. Purchasing the
Contract in part for such purposes entails certain risks. For example, if the
investment performance of Sub-Accounts to which Account Value is allocated is
poorer than expected or if sufficient premiums are not paid, the Contract may
lapse or may not accumulate sufficient Account Value to fund the purpose for
which the Contract was purchased. Withdrawals and Contract loans may
significantly affect current and future Account Value, Cash Surrender Value, or
Death Benefit proceeds. Depending upon Sub-Account investment performance and
the amount of a Contract loan, the loan may cause a Contract to lapse. Because
the Contract is designed to provide benefits on a long-term basis, before
purchasing a Contract for a specialized purpose a purchaser should consider
whether the long-term nature of the Contract is consistent with the purpose for
which it is being considered. Using a Contract for a specialized purpose may
have tax consequences. (See "Federal Tax Matters," page 20.)
 
                                       9
<PAGE>
DEDUCTIONS AND CHARGES
- -----------------------------------------------------------
 
MONTHLY DEDUCTIONS
 
On each Monthly Activity Date including the Contract Date, the Company will
deduct from the Account Value attributable to the Variable Account an amount
("Monthly Deduction Amount") to cover charges and expenses incurred in
connection with a Contract. Each Monthly Deduction Amount will be deducted pro
rata from each Variable Sub-Account attributable to the Contract such that the
proportion of Account Value of the Contract attributable to each Sub-Account
remains the same before and after the deduction. The Monthly Deduction Amount
will vary from month to month. If the Cash Surrender Value is not sufficient to
cover a Monthly Deduction Amount due on any Monthly Activity Date, the Contract
may lapse. See "Contract Benefits and Rights-- Lapse and Reinstatement," page
14. The following is a summary of the monthly deductions and charges which
constitute the Monthly Deduction Amount:
 
    COST OF INSURANCE CHARGE:  The cost of insurance charge covers the Company's
anticipated mortality costs for standard and substandard risks. Current cost of
insurance rates are lower after the 10th Contract Year. The current cost of
insurance charge will not exceed the guaranteed cost of insurance charge. This
charge is the maximum annual cost of insurance per $1,000 as indicated in the
Contract; multiplied by the difference between the Death Benefit and the Account
Value (both as determined on the Monthly Activity Date); divided by $1,000; and
divided by 12. For standard risks, the guaranteed cost of insurance rate is
based on the 1980 Commissioners Standard Ordinary Mortality Table, age last
birthday. (Unisex rates may be required in some states). A table of guaranteed
cost of insurance charges per $1,000 will be included in each Contract; however,
the Company reserves the right to use rates less than those shown in the table.
Substandard risks will be charged at a higher cost of insurance rate that will
not exceed rates based on a multiple of the 1980 Commissioners Standard Ordinary
Mortality Table, age last birthday. The multiple will be based on the Insured's
substandard rating.
 
The cost of insurance charge rates are applied to the difference between the
Death Benefit determined on the Monthly Activity Date and the Account Value on
that same date prior to assessing the Monthly Deduction Amount, because the
difference is the amount for which the Company is at risk should the Death
Benefit be then payable. The Death Benefit as computed on a given date is the
greater of (1) the Specified Amount on that date, and (2) the Account Value on
that date multiplied by the applicable Death Benefit ratio. (For an explanation
of the Death Benefit, see "Contract Benefits and Rights" on page 12.)
 
EXAMPLE:
 
<TABLE>
<S>                                         <C>
Specified Amount..........................  $ 100,000
Account Value on the Monthly Activity
 Date.....................................  $  30,000
Insured's attained age....................         45
Death Benefit ratio for age 45............       2.15
</TABLE>
 
On the Monthly Activity Date in this example, the Death Benefit as then computed
would be $100,000, because the Specified Amount ($100,000) is greater than the
Account Value multiplied by the applicable Death Benefit ratio ($30,000 X 2.15 =
$64,500). Since the Account Value on that date is $30,000, the cost of insurance
charges per $1,000 are applied to the difference ($100,000 - $30,000 = $70,000).
 
Assume that the Account Value in the above example was $50,000. The Death
Benefit would then be $107,500 (2.15 X $50,000), since this is greater than the
Specified Amount ($100,000). The cost of insurance rates in that case would be
applied to ($107,500 - $50,000) = $57,500.
 
Because the Account Value and, as a result, the amount for which the Company is
at risk under a Contract may vary from month to month, the cost of insurance
charge may also vary on each Monthly Activity Date. However, once a risk rating
class has been assigned to an Insured when the Contract is issued, that rating
class will not change if additional premium payments or partial withdrawals
increase or decrease the Specified Amount.
 
    TAX EXPENSE CHARGE:  The Company will deduct monthly from the Account Value
a tax expense charge equal to an annual rate of 0.40% for the first ten Contract
Years. This charge compensates the Company for premium taxes imposed by various
states and local jurisdictions and for federal taxes related to the receipt of
premiums under the Contract and that results from the application of section 848
of the Code. The charge includes a premium tax deduction of 0.25% and a federal
tax deduction of 0.15%. The 0.25% premium tax deduction over ten Contract Years
approximates the Company's average expenses for state and local premium taxes
(2.5%). Premium taxes vary, ranging from zero to 3.5%. The premium tax deduction
will be imposed regardless of a contract owner's state of residence and,
therefore, is made whether or not any premium tax applies. The deduction may be
higher or lower than the premium tax imposed. The 0.15% federal tax deduction
helps reimburse the Company for approximate expenses incurred for federal taxes
resulting from the application of Section 848 of the Code.
 
    ADMINISTRATIVE EXPENSE CHARGE:  The Company will deduct monthly from the
Account Value an administrative expense charge equal to an annual rate of 0.25%.
This charge compensates the Company for administrative expenses incurred in the
administration of the Variable Account and the Contracts.
 
All monthly deductions are taken by canceling Accumulation Units of the Variable
Account under your Contract.
 
                                       10
<PAGE>
OTHER DEDUCTIONS
 
    MORTALITY AND EXPENSE RISK CHARGE:  The Company will deduct from the
Variable Account a daily charge equivalent to an annual rate of 0.90% for the
mortality risks and expense risks the Company assumes in relation to the
Contracts. The mortality risk assumed includes the risk that the cost of
insurance charges specified in the Contract will be insufficient to meet claims.
The Company also assumes a risk that the Death Benefit will exceed the amount on
which the cost of insurance charges were based on the Monthly Activity Date
preceding the death of an Insured. The expense risk assumed is that expenses
incurred in issuing and administering the Contracts will exceed the
administrative charges set in the Contract.
 
    ANNUAL MAINTENANCE FEE:  The Company will deduct from the Account Value an
annual maintenance fee of $30 on each Contract Anniversary. This fee will help
reimburse the Company for administrative and maintenance costs of the Contracts.
Currently, this charge is waived for Contracts which have an aggregate premium
which equals or exceeds the dollar amount indicated on your Contract data page.
 
    TAXES CHARGED AGAINST THE VARIABLE ACCOUNT:  Currently, no charge is made to
the Variable Account for federal income taxes that may be attributable to the
operations of the Variable Account (as opposed to the federal tax related to the
receipt of premiums under the Contract). The Company may, however, make such a
charge in the future. Charges for other taxes, if any, attributable to the
Variable Account or this class of Contracts may also be made.
 
    CHARGES AGAINST THE FUND:  The Variable Account purchases shares of the Fund
at net asset value. The net asset value of the Fund shares reflects investment
advisory fees and administrative expenses already deducted from the assets of
the Fund. Fund investment management fees are a percentage of the average daily
value of the net assets of the Portfolios:
 
FUND EXPENSES
(AS A PERCENTAGE OF FUND ASSETS)
 
<TABLE>
<CAPTION>
                                        TOTAL FUND         OTHER         ANNUAL
PORTFOLIO                             MANAGEMENT FEES    EXPENSES       EXPENSES
- ------------------------------------  ---------------  -------------  ------------
<S>                                   <C>              <C>            <C>
Money Market........................          .50%            .02%           .52%
Quality Income Plus.................          .50%(1)         .03%           .53%
High Yield..........................          .50%            .01%           .51%
Utilities...........................          .65%(2)         .02%           .67%
Income Builder......................          .75%(3)         .07%           .82%
Dividend Growth.....................          .56%(4)         .01%           .57%
Capital Growth......................          .65%            .08%           .73%
Global Dividend Growth..............          .75%            .10%           .85%
European Growth.....................         1.00%            .11%          1.11%
Pacific Growth......................         1.00%            .37%          1.37%
Capital Appreciation................          .75%(3)         .07%           .82%
Equity..............................          .50%(5)         .04%           .54%
Strategist..........................          .50%            .02%           .52%
</TABLE>
 
- ------------------------------
(1)  This percentage is applicable to Portfolio net assets of up to $500
    million. For net assets which exceed $500 million, the management fee will
    be 0.45%.
(2)  This percentage is applicable to Portfolio net assets of up to $500
    million. For net assets which exceed $500 million, the management fee will
    be 0.55%.
(3)  The Income Builder Portfolio and the Capital Appreciation Portfolio
    commenced operations on January 21, 1997. The Investment Manager has
    undertaken to assume all expenses of each of these Portfolios (except for
    any brokerage fees) and waive the compensation provided for each of these
    Portfolios in its Management Agreement with the Fund until such time as the
    pertinent Portfolio has $50 million of net assets or until July 31, 1998,
    whichever occurs first.
(4)  The management fee will be 0.625% for net assets of up to $500 million. For
    net assets which exceed $500 million, but do not exceed $1 billion, the
    management fee will be 0.50% and for net assets that exceed $1 billion, the
    management fee will be 0.475%.
(5)  This percentage is applicable to Portfolio net assets of up to $1 billion.
    For net assets which exceed $1 billion, the management fee will be 0.475%.
 
    WITHDRAWAL CHARGE:  Upon surrender of the Contract and partial withdrawals
in excess of the Free Withdrawal Amount, a withdrawal charge may be assessed.
The Free Withdrawal Amount in any Contract Year is 15% of total premiums paid.
Any Free Withdrawal Amount not taken in a Contract Year may not be carried
forward to increase the Free Withdrawal Amount in any subsequent year.
Withdrawals in excess of the Free Withdrawal Amount will be subject to a
withdrawal charge as set forth in the table below:
 
<TABLE>
<CAPTION>
                                                  PERCENTAGE OF
                                                     INITIAL
                                                     PREMIUM
CONTRACT YEAR                                       WITHDRAWN
- ------------------------------------------------  --------------
<S>                                               <C>
1...............................................      7.75%
2...............................................      7.75%
3...............................................      7.75%
4...............................................      7.25%
5...............................................      6.25%
6...............................................      5.25%
7...............................................      4.25%
8...............................................      3.25%
9...............................................      2.25%
10+.............................................      0.00%
</TABLE>
 
After the ninth Contract Year, no withdrawal charges will be imposed. In
addition, no withdrawal charge will be imposed on any withdrawal to the extent
that aggregate withdrawal charges and the federal tax portion of the tax expense
charge imposed would otherwise exceed 9% of total premiums paid prior to the
withdrawal. The withdrawal charge may be waived under certain circumstances if
the Insured is confined to a qualified long-term care facility or hospital. See
"Contract Benefits and Rights-- Confinement Waiver Benefit", page 15.
 
The withdrawal charge is imposed to cover a portion of the sales expense
incurred by the Company in distributing the Contracts. This expense includes
agents' commissions, advertising and the printing of prospectuses.
 
    DUE AND UNPAID PREMIUM TAX CHARGE:  During the first nine Contract Years, a
charge for due and unpaid premium tax
 
                                       11
<PAGE>
will be imposed on full or partial withdrawals in excess of the Free Withdrawal
Amount. This charge is shown below, as a percent of the Account Value withdrawn:
 
<TABLE>
<CAPTION>
                                                  PERCENTAGE OF
                                                     INITIAL
                                                     PREMIUM
YEAR                                                WITHDRAWN
- ------------------------------------------------  --------------
<S>                                               <C>
1...............................................      2.25%
2...............................................      2.00%
3...............................................      1.75%
4...............................................      1.50%
5...............................................      1.25%
6...............................................      1.00%
7...............................................      0.75%
8...............................................      0.50%
9...............................................      0.25%
10+.............................................      0.00%
</TABLE>
 
After the ninth Contract Year, no due and unpaid premium tax charge will be
imposed. The percentages indicated above are guaranteed not to increase.
 
CONTRACT BENEFITS AND RIGHTS
- -----------------------------------------------------------
 
DEATH BENEFIT
 
The Contracts provide for the payment of Death Benefit proceeds to the named
beneficiary when the Insured under the Contract dies. The Proceeds payable to
the beneficiary equal the Death Benefit less any Indebtedness and less any due
and unpaid Monthly Deduction Amounts occurring during a grace period (if
applicable). The Death Benefit equals the greater of (1) the Specified Amount or
(2) the Account Value multiplied by the Death Benefit ratio. The ratios vary
according to the attained age of the Insured and are specified in the Contract.
Therefore, an increase in Account Value due to favorable investment experience
may increase the Death Benefit above the Specified Amount; and a decrease in
Account Value due to unfavorable investment experience may decrease the Death
Benefit (but not below the Specified Amount).
 
<TABLE>
<CAPTION>
EXAMPLES:                                      A          B
                                           ---------  ---------
<S>                                        <C>        <C>
Specified Amount.........................  $ 100,000  $ 100,000
Insured's Age............................         45         45
Account Value on Date of Death...........  $  48,000  $  34,000
Death Benefit Ratio......................       2.15       2.15
</TABLE>
 
In Example A, the Death Benefit equals $103,200, i.e., the greater of $100,000
(the Specified Amount) and $103,200 (the Account Value at the Date of Death of
$48,000, multiplied by the Death Benefit ratio of 2.15). This amount, less any
Indebtedness and due and unpaid Monthly Deduction Amounts, constitutes the
proceeds which we would pay to the beneficiary.
 
In Example B, the Death Benefit is $100,000, i.e., the greater of $100,000 (the
Specified Amount) or $73,100 (the Account Value of $34,000 multiplied by the
Death Benefit ratio of 2.15).
 
All or part of the proceeds may be paid in cash or applied under an income plan.
See "Other Matters--Payment Options," page 17.
 
ACCELERATED DEATH BENEFIT
 
If the Insured becomes terminally ill, the Contract Owner may request an
Accelerated Death Benefit in an amount up to the lesser of (1) 50% of the
Specified Amount on the day we receive the request, and (2) $250,000 for all
policies issued by the Company which cover the Insured. "Terminally ill" means
an illness or physical condition of the Insured that, notwithstanding
appropriate medical care, will result in a life expectancy of 12 months or less.
If the Insured is terminally ill as the result of an illness, the accelerated
Death Benefit is not available unless the illness occurred at least 30 days
after the Issue Date. If the Insured is terminally ill as the result of an
accident, the Accelerated Death Benefit is available if the accident occurred
after the issue date.
 
We will pay benefits due under the Accelerated Death Benefit provision upon
receipt of a written request from the Contract Owner and due proof that the
Insured has been diagnosed as terminally ill. The Company also reserves the
right to require supporting documentation of the diagnosis and to require (at
the Company's expense) an examination of the Insured by a physician of the
Company's choice to confirm the diagnosis. The amount of the payment will be the
amount requested by the Contract Owner, reduced by the sum of (1) a 12 month
interest discount to reflect the early payment; (2) an administrative fee (not
to exceed $250); and (3) a pro rata amount of any outstanding Contract loan and
accrued loan interest. After the payment has been made, the Specified Amount,
the Account Value and any outstanding Contract loan will be reduced on a prorata
basis.
 
                                       12
<PAGE>
Only one request for an Accelerated Death Benefit per Insured is allowed. The
Accelerated Death Benefit may not be available in all states. Its features may
differ from those discussed above as required by state law. Please refer to the
Contract for further information.
 
ACCOUNT VALUE
 
The Account Value of a Contract will be computed on each Valuation Day. On the
Contract Date, the Account Value is equal to the initial premium less the
Monthly Deduction Amount for the first month. Thereafter, the Account Value will
vary to reflect the investment experience of the Fund, the value of the Loan
Account and the Monthly Deduction Amounts. There is no minimum guaranteed
Account Value.
 
The Account Value of a particular Contract is related to the net asset value of
the Fund to which premiums on the Contract have been allocated. The Account
Value on any Valuation Day is calculated by multiplying the number of
Accumulation Units credited to the Contract in each Variable Sub-Account as of
the Valuation Day by the then Accumulation Unit value of that Sub-Account and
then summing the result for all the Sub-Accounts credited to the Contract and
the value of the Loan Account. See "The Contract--Accumulation Unit Values,"
page 9.
 
TRANSFER OF ACCOUNT VALUE
 
While the Contract remains in force and subject to the Company's transfer rules
then in effect, the Contract Owner may request that part or all of the Account
Value of a particular Variable Sub-Account be transferred to other Variable
Sub-Accounts. The Company reserves the right to impose a $25 charge on each such
transfer in excess of 12 per Contract Year. However, there are no charges on
transfers at the present time. The minimum amount that can be transferred is
shown on the Contract data page (currently $100) or the total amount in the
Variable Sub-Account whichever is less.
 
Telephone transfer requests will be accepted by the Company if received at
1(800)654-2397 by 4:00 p.m., Eastern Time. Telephone transfer requests received
at any other telephone number or after 4:00 p.m., Eastern Time will not be
accepted by the Company. Telephone transfer requests received before 4:00 p.m.,
Eastern Time are effected at the next computed value. Transfers by telephone may
be made by the Contract Owner's Account Executive or attorney-in-fact pursuant
to a power of attorney. Telephone transfers may not be permitted in some states.
The policy of the Company and its agents and affiliates is that they will not be
responsible for losses resulting from acting upon telephone requests reasonably
believed to be genuine. The Company will employ reasonable procedures to confirm
that instructions communicated by telephone are genuine; otherwise, the Company
may be liable for any losses due to unauthorized or fraudulent instructions. The
procedures the Company follows for transactions initiated by telephone include
requirements that callers on behalf of a Contract Owner identify themselves and
the Contract Owner by name and social security number or other identifying
information. All transfer instructions by telephone are tape recorded.
Otherwise, transfer requests must be in writing, on a form provided by the
Company.
 
As a result of a transfer, the number of Accumulation Units credited to the
Variable Sub-Account from which the transfer is made will be reduced by the
number obtained by dividing the amount transferred by the Accumulation Unit
value of the Sub-Account from which the transfer is made on the Valuation Date
the Company receives the transfer request. The number of Accumulation Units
credited to the Sub-Account to which the transfer is made will be increased by
the number obtained by dividing the amount transferred by the Accumulation Unit
value of that Sub-Account on the Valuation Day the Company receives the transfer
request.
 
DOLLAR COST AVERAGING
 
Transfers may be made automatically through Dollar Cost Averaging while the
Contract is in force. Dollar Cost Averaging permits the Owner to transfer a
specified amount every month (or some other frequency as may be determined by
the Company) from the Money Market Sub-Account to any other Variable Sub-
Account. The minimum amount that can be transferred is shown on the Contract
data page (currently $100) or the total amount in the Variable Sub-Account
whichever is less. 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. There are no additional
charges imposed upon participants in the Dollar Cost Averaging program.
Transfers under Dollar Cost Averaging are not included in the count toward the
12 free transfers per Contract Year currently permitted.
 
CONTRACT LOANS
 
While the Contract is in force, a Contract Owner may obtain, without the consent
of the beneficiary (provided the designation of beneficiary is not irrevocable),
one or both of two types of cash loans from the Company. These types are
preferred loans (described below) and non-preferred loans. Both types of loans
are secured by the Contract. The maximum amount available for a loan is 90% of
the Contract's Cash Value, less the amount of all Contract loans existing on the
date of the loan (including loan interest to the next Contract Anniversary),
less any due and unpaid Monthly Deduction Amounts, and less any annual
maintenance fee due on or before the next Contract Anniversary.
 
                                       13
<PAGE>
The loan amount will be transferred pro rata from each Variable Sub-Account
attributable to the Contract (unless the Contract Owner specifies otherwise) to
the Loan Account. The amounts allocated to the Loan Account will be credited
with interest at the loan credited rate set forth in the Contract. Loans will
bear interest at rates determined by the Company from time to time, but which
will not exceed the maximum rate indicated in the Contract (currently, 8% per
year). The amount of the Loan Account that equals the difference between the
Account Value and the total of all premiums paid under the Contract net of any
premiums returned due to partial withdrawals and net of any prior loan balance,
as determined on each Contract Anniversary, is considered a "preferred loan."
Preferred loans bear interest at a rate not to exceed the preferred loan rate
set forth in the Contract. The difference between the value of the Loan Account
and the Indebtedness will be transferred on a pro-rata basis from the Variable
Sub-Accounts to the Loan Account on each Contract Anniversary. If the aggregate
outstanding loan(s) and loan interest secured by the Contract exceeds the Cash
Value of the Contract, the Company will give written notice to the Contract
Owner that unless the Company receives an additional payment within 61 days to
reduce the aggregate outstanding loan(s) secured by the Contract, the Contract
may lapse.
 
All or any part of any loan secured by a Contract may be repaid while the
Contract is still in effect. When loan repayments or interest payments are made,
the repayment will be allocated among the Variable Sub-Accounts in the same
percentage as subsequent payments are allocated (unless the Contract Owner
requests a different allocation), and an amount equal to the payment will be
deducted from the Loan Account. Any outstanding loan at the end of a grace
period must be repaid before the Contract will be reinstated. See "Contract
Benefits and Rights-- Lapse and Reinstatement," page 14.
 
A loan, whether or not repaid, will have a permanent effect on the Account Value
because the investment results of each Variable Sub-Account will apply only to
the amount remaining in that Sub-Account. The longer a loan is outstanding, the
greater the effect is likely to be. The effect could be favorable or
unfavorable. If the Variable Sub-Accounts earn more than the annual interest
rate for amounts held in the Loan Account, a Contract Owner's Account Value will
not increase as rapidly as it would have had no loan been made. If the Variable
Sub-Accounts earn less than that rate, the Contract Owner's Account Value will
be greater than it would have been had no loan been made. Also, if not repaid,
the aggregate outstanding loan(s) will reduce the Death Benefit proceeds and
Cash Surrender Value otherwise payable.
 
AMOUNT PAYABLE ON SURRENDER OF THE CONTRACT
 
While the Contract is in force, a Contract Owner may elect, without the consent
of the beneficiary (provided the designation of beneficiary is not irrevocable),
to fully surrender the Contract. Upon surrender, the Contract Owner will receive
the Cash Surrender Value determined as of the day the Company receives the
Contract Owner's written request or the date requested by the Contract Owner,
whichever is later. The Cash Surrender Value equals the Cash Value less the
annual maintenance fee and any Indebtedness. The Company will pay the Cash
Surrender Value of the Contract within seven days of receipt by the Company of
the written request or on the effective surrender date requested by the Contract
Owner, whichever is later.
 
The Contract will terminate on the date of receipt of the written request, or
the date the Contract Owner requests the surrender to be effective, whichever is
later. For a discussion of the tax consequences of surrendering the Contract,
see "Federal Tax Matters," page 20.
 
The Contract Owner may elect to apply the surrender proceeds to an Income Plan
(see "Other Matters--Payment Options," page 17).
 
PARTIAL WITHDRAWALS
 
While the Contract is in force, a Contract Owner may elect by written request to
make partial withdrawals from the Cash Surrender Value of at least $100, or the
total amount in the Variable Sub-Account, whichever is less. The Cash Surrender
Value, after the partial withdrawal, must at least equal $2,000; otherwise, the
request will be treated as a request for full surrender. The partial withdrawal
will be deducted pro rata from each Variable Sub-Account, unless the Contract
Owner instructs otherwise. The Specified Amount after the partial withdrawal
will be the greater of:
 
    - the Specified Amount prior to the partial withdrawal reduced
      proportionately to the reduction in Account Value; or
 
    - the minimum Specified Amount necessary in order to meet the definition of
      a life insurance contract under section 7702 of the Code.
 
Partial withdrawals in excess of the Free Withdrawal Amount may be subject to a
withdrawal charge and any due and unpaid premium tax charges. See "Deductions
and Charges--Other Deductions--Withdrawal Charge" and "Due and Unpaid Premium
Tax Charge," page 11. For a discussion of the tax consequences of partial
withdrawals, see "Federal Tax Matters," page 20.
 
MATURITY
 
The Contract has no maturity date.
 
LAPSE AND REINSTATEMENT
 
The Contract will remain in force until the Cash Surrender Value is insufficient
to cover a Monthly Deduction Amount due on a
 
                                       14
<PAGE>
Monthly Activity Date. The Company will give written notice to the Contract
Owner that if an amount shown in the notice (which will be sufficient to cover
the Monthly Deduction Amount(s) due) is not paid within 61 days ("Grace
Period"), there is a danger of lapse.
 
The Contract will continue through the grace period, but if no payment is
forthcoming, it will terminate at the end of the grace period. If the Insured
dies during the grace period, the proceeds payable under the Contract will be
reduced by the Monthly Deduction Amount(s) due and unpaid. See "Contract
Benefits and Rights--Death Benefit," page 12.
 
If the Contract lapses, the Contract Owner may apply for reinstatement of the
Contract by payment of the reinstatement premium (and any applicable charges)
required under the Contract. A request for reinstatement must be made within
five years of the date the Contract entered a grace period. If a loan was
outstanding at the time of lapse, the Company will require repayment of the loan
before permitting reinstatement. In addition, the Company reserves the right to
require evidence of insurability satisfactory to the Company. The reinstatement
premium is equal to an amount sufficient to (1) cover all Monthly Deduction
Amounts and annual maintenance fee due and unpaid during the grace period, and
(2) keep the Contract in force for three months after the date of reinstatement.
The Specified Amount upon reinstatement cannot exceed the Specified Amount of
the Contract at its lapse. The Account Value on the reinstatement date will
reflect the Account Value at the time of termination of the Contract plus the
premiums paid at the time of reinstatement. Withdrawal charges and due and
unpaid premium tax charges, cost of insurance, and tax expense charges will
continue to be based on the original Contract Date.
 
CANCELLATION AND EXCHANGE RIGHTS
 
A Contract Owner has a limited right to return a Contract for cancellation. This
right to return exists during the free-look period. The free-look period is a
number of days (which varies by state) as specified in your Contract. If the
Contract is returned for cancellation by mail or personal delivery to the
Company or to the Account Executive who sold the Contract within the free-look
period following delivery of the Contract to the Contract Owner, the Company
will return to the Contract Owner within 7 days the sum of (1) the Account Value
on the date the returned Contract is received by the Company or its agent; and
(2) any deductions under the Contract or by the Fund for taxes, charges or fees.
Some states may require the Company to return the premiums paid for the returned
Contract.
 
Once the Contract is in effect, it may be exchanged during the first 24 months
after its issuance for a non-variable permanent life insurance contract offered
by the Company on the life of the Insured. The Company reserves the right to
make available a permanent life insurance contract offered by the Company's
account or any affiliated company without evidence of insurability. The amount
at risk to the Company (i.e., the difference between the Death Benefit and the
Account Value) under the new contract will be equal to or less than the amount
at risk to the Company under the exchanged Contract on the date of exchange.
Premiums under the new Contract will be based on the same risk classification as
the exchanged Contract. The exchange is subject to adjustments in premiums and
Account Value to reflect any variance between the exchanged Contract and the new
contract. The Company reserves the right to make such a contract available that
is offered by the Company's parent or by any affiliate of the Company.
 
CONFINEMENT WAIVER BENEFIT
 
Under the terms of an amendatory endorsement to the Contract, the Company will
waive any withdrawal charges on partial withdrawals and surrenders of the
Contract requested while the Insured is confined to a qualified long-term care
facility or hospital for a period of more than 90 consecutive days beginning 30
days or more after the issue date, or within 90 days after the Insured is
discharged from such confinement. The confinement must have been prescribed by a
licensed medical doctor or a licensed doctor of osteopathy, operating within the
scope of his or her license, and must be medically necessary. The prescribing
doctor may not be the Insured, the Contract Owner, or any spouse, child, parent,
grandchild, grandparent, sibling or in-law of the Contract Owner. "Medically
necessary" means appropriate and consistent with the diagnosis and which could
not have been omitted without adversely affecting the Insured's condition. The
confinement waiver benefit may not be available in all states. The Company
reserves the right to discontinue the offering of the confinement waiver benefit
amendatory endorsement upon the purchase of a new contract.
 
SUSPENSION OF VALUATION, PAYMENTS AND TRANSFERS
 
The Company will suspend all procedures requiring valuation of the Variable
Account (including transfers, surrenders and loans) on any day the New York
Stock Exchange is closed or trading is restricted due to an existing emergency
as defined by the Securities and Exchange Commission, or on any day the
Securities and Exchange Commission has ordered that the right of surrender of
the Contracts be suspended for the protection of Contract Owners, until such
condition has ended.
 
LAST SURVIVOR CONTRACTS
 
The Contracts are offered on a single life and "last survivor" basis. Contracts
sold on a last survivor basis operate in a manner almost identical to the single
life version. The most important difference
 
                                       15
<PAGE>
is that the last survivor version involves two Insureds and the proceeds are
paid only on the death of the last surviving Insured. The other significant
differences between the last survivor and single life versions are listed below:
 
    1.  Last survivor Contracts are offered for prospective insured persons age
18-85.
 
    2.  The cost of insurance charges under the last survivor Contracts are
determined in a manner that reflects the anticipated mortality of the two
Insureds and the fact that the Death Benefit is not payable until the death of
the second Insured. See the last survivor illustrations in "Appendix A," page
A-1.
 
    3.  To qualify for simplified underwriting under a last survivor Contract,
both Insureds must meet the simplified underwriting standards.
 
    4.  For a last survivor Contract to be reinstated, both Insureds must be
alive on the date of reinstatement.
 
    5.  The Contract provisions regarding misstatement of age or sex, suicide
and incontestability apply to either Insured.
 
    6.  The Accelerated Death Benefit provision is only available upon terminal
illness of the last survivor.
 
    7.  The Confinement Waiver Benefit is available upon confinement of either
insured.
 
OTHER MATTERS
- -----------------------------------------------------------
 
VOTING RIGHTS
 
In accordance with its view of presently applicable law, the Company will vote
the shares of the Fund at regular and special meetings of the shareholders of
the Fund in accordance with instructions from Contract Owners (or the assignee
of the Contract, as the case may be) having a voting interest in the Variable
Account. The number of shares of a Fund Portfolio held in a Variable Account
which are attributable to each Contract Owner is determined by dividing the
Contract Owner's interest in that Variable Sub-Account by the per share net
asset value of the corresponding Fund Portfolio. The Company will vote shares
for which no instructions have been given and shares which are not attributable
to Contract Owners (i.e., shares owned by the Company) in the same proportion as
it votes shares for which it has received instructions. If the Investment
Company Act of 1940 or any rule promulgated hereunder should be amended,
however, or if the Company's present interpretation should change and, as a
result, the Company determines it is permitted to vote the shares of the Fund in
its own right, it may elect to do so.
 
The voting interests of the Contract Owner (or the assignee) in the Fund will be
determined as follows: Contract Owners are entitled to give voting instructions
to the Company with respect to Fund Portfolio shares attributable to them as
described above, determined on the record date for the shareholder meeting for
the Fund. Therefore, if a Contract Owner has taken a loan secured by the
Contract, amounts transferred from the Sub-Account(s) to the Loan Account in
connection with the loan (see "Contract Benefits and Rights--Contract Loans,"
page 13) will not be considered in determining the voting interests of the
Contract Owner. Contract Owners should review the prospectus for the Fund which
accompanies this prospectus to determine matters on which Fund shareholders may
vote.
 
The Company may, when required by state insurance regulatory authorities,
disregard voting instructions if the instructions require that the shares be
voted so as to cause a change in the sub-classification or investment objective
of the Fund or to approve or disapprove an investment advisory contract for the
Fund.
 
In addition, the Company itself may disregard voting instructions in favor of
changes initiated by Contract Owners in the investment objectives or the
investment adviser of the Fund if the Company reasonably disapproves of such
changes. A change would be disapproved only if the proposed change is contrary
to state law or prohibited by state regulatory authorities. If the Company does
disregard voting instructions, a summary of that action and the reasons for such
action will be included in the next periodic report to Contract Owners.
 
STATEMENTS TO CONTRACT OWNERS
 
The Company will maintain all records relating to the Variable Account and the
Variable Sub-Accounts. At least once each Contract Year, the Company will send
to each Contract Owner a statement showing the Coverage Amount and the Account
Value of the Contract (indicating the number of Accumulation Units credited to
the Contract in each Variable Sub-Account and the corresponding Accumulation
Unit value), and any outstanding loan secured by the Contract as of the date of
the statement. The statement will also show premium paid, and Monthly Deduction
Amounts under the Contract since the last statement, and any other information
required by any applicable law or regulation.
 
                                       16
<PAGE>
LIMIT ON RIGHT TO CONTEST
 
The Company may not contest the validity of the Contract after it has been in
effect during the Insured's lifetime for two years from the Contract Date. If
the Contract is reinstated, the two-year period is measured from the date of
reinstatement. Any increase in the Specified Amount for which evidence of
insurability was obtained is contestable for 2 years from its effective date. In
addition, if the Insured dies by suicide while sane or self destruction while
insane in the two-year period after the Contract Date, or such period as
specified in state law, the benefit payable will be limited to the premiums paid
less any Indebtedness and partial withdrawals. If the Insured dies by suicide
while sane or self-destruction while insane in the two-year period following an
increase in the Specified Amount, the benefit payable with respect to the
increase will be limited to the additional premium paid for such increase, less
any Indebtedness and partial withdrawals.
 
MISSTATEMENT AS TO AGE AND SEX
 
If the age or sex of the Insured is incorrectly stated, the Death Benefit will
be appropriately adjusted as specified in the Contract.
 
PAYMENT OPTIONS
 
The surrender proceeds or Death Benefit proceeds under the Contracts may be paid
in a lump sum or may be applied to one of the Company's Income Plans. If the
amount to be applied to an Income Plan is less than $3,000 or if it would result
in an initial income payment of less than $20, the Company may require that the
frequency of income payments be decreased such that the income payments are
greater than $20 each, or it may elect to pay the amount in a lump sum. No
surrender or partial withdrawals are permitted after payments under an Income
Plan commence.
 
We will pay interest on the proceeds from the date of the Insured's death to the
date payment is made or a payment option is elected. At such times, the proceeds
are not subject to the investment experience of the Variable Account.
 
The Income Plans are fixed annuities payable from the Company's general account.
They do not reflect the investment experience of the Variable Account. Fixed
annuity payments are determined by multiplying the amount applied to the annuity
by a rate to be determined by the Company which is no less than the rate
specified in the fixed payment annuity tables in the Contract. The annuity
payment will remain level for the duration of the annuity. The Company may
require proof of age and gender of the payee (and joint payee, if applicable)
before payments begin. The Company may also require proof that such person(s)
are living before it makes each payment.
 
The following options are available under the Contracts (the Company may offer
other payment options):
 
INCOME PLAN 1--LIFE INCOME WITH GUARANTEED PAYMENTS
The Company will make payments for as long as the payee lives. If the payee 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 payee or Joint payee,
named at the time of Income Plan selection, is living. If both the payee and the
Joint payee die before the selected number of guaranteed payments have been
made, the Company will continue to pay the remainder of the guaranteed payments.
 
The Company will make any other arrangements for income payments as may be
agreed on.
 
BENEFICIARY
 
The applicant names the beneficiary in the application for the Contract. The
Contract Owner may change the beneficiary (unless irrevocably named) during the
Insured's lifetime by written request to the Company. If no beneficiary is
living when the Insured dies, the proceeds will be paid to the Contract Owner if
living; otherwise to the Contract Owner's estate.
 
ASSIGNMENT
 
Unless required by state law, the Contract may not be assigned as collateral for
a loan or other obligation.
 
DIVIDENDS
 
No dividends will be paid under the Contracts.
 
                                       17
<PAGE>
EXECUTIVE OFFICERS AND DIRECTORS OF THE COMPANY
- -----------------------------------------------------------
 
The directors and executive officers of the Company 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, 52, Chief Executive Officer and Chairman of the Board
(1995)*
 
Also Director (1986-Present) and Senior Vice President (1995-Present) of
Allstate Insurance Company; Director (1991-Present) of Allstate Life Financial
Services, Inc.; Director (1986-Present) and President (1990-Present) Allstate
Life Insurance Company; Director (1983-Present) and Chairman of the Board
(1990-Present) of Allstate Life Insurance Company of New York; Chairman of the
Board of Directors and Chief Executive Officer (1995-Present), Chairman of the
Board of Directors and President (1990-1995) of Glenbrook Life Insurance
Company; Director (1992-Present), Chairman of the Board of Directors and Chief
Executive Officer (1995-Present) of Glenbrook Life and Annuity Company; Director
and Chairman of the Board (1995-Present) of Laughlin Group Holdings, Inc.;
Director and Chairman of the Board of Directors and Chief Executive Officer
(1989-Present) Lincoln Benefit Life Company; Chairman of the Board of Directors
and Chief Executive Officer (1995-Present) Surety Life Insurance Company; and
Trustee (1991-Present) and Vice President (1995-Present) The Allstate
Foundation.
 
PETER H. HECKMAN, 52, President, Chief Operating Officer and Director (1996)*
 
Also Director and Vice President (1988-Present) of Allstate Life Insurance
Company; Director (1990-1996), Vice President (1989-Present), Allstate Life
Insurance Company of New York; Director (1991-1993) of Allstate Life Financial
Services, Inc.; Director (1990-Present), President and Chief Operating Officer
(1996-Present), and Vice President (1990-1996), Glenbrook Life Insurance
Company; Director (1992-Present) President and Chief Operating Officer
(1996-Present), and was Vice President (1995-1996), Glenbrook Life and Annuity
Company; Director (1995-Present) and Vice Chairman of the Board (1996-Present)
Laughlin Group Holdings, Inc.; Director (1990-Present) and Vice Chairman of the
Board (1996-Present) Lincoln Benefit Life Company; and Director (1995-Present)
and Vice Chairman of the Board (1996-Present) Surety Life Insurance Company.
 
MICHAEL J. VELOTTA, 51, Vice President, Secretary, General Counsel, and Director
(1992)*
 
Also Director and Secretary (1993-Present) of Allstate Life Financial Services,
Inc.; Director (1992-Present) Vice President, Secretary and General Counsel
(1993-Present) Allstate Life Insurance Company; Director (1992-Present) Vice
President, Secretary and General Counsel (1993-Present) Allstate Life Insurance
Company of New York; Director (1992-Present) Vice President, Secretary and
General Counsel (1993-Present) Glenbrook Life Insurance Company; Director
(1992-Present) Vice President, Secretary and General Counsel (1993-Present)
Glenbrook Life and Annuity Company; Director and Secretary (1995-Present)
Laughlin Group Holdings, Inc.; Director (1992-Present) and Assistant Secretary
(1995-Present) Lincoln Benefit Life Company; and Director and Assistant
Secretary (1995-Present) Surety Life Insurance Company.
 
JOHN R. HUNTER, 42, Director (1996)*
 
Also Assistant Vice President (1990-Present) Allstate Life Insurance Company;
Assistant Vice President (1996-Present) Allstate Life Insurance Company of New
York; Director (1996-Present) Glenbrook Life Insurance Company; and Director
(1996-Present) and Senior Vice President--Product Management (1995-Present)
Glenbrook Life and Annuity Company.
 
MARLA G. FRIEDMAN, 43, Vice President (1996)*
 
Also Director (1991-Present) and Vice President (1988-Present) Allstate Life
Insurance Company; Director (1993-1996) Allstate Life Financial Services, Inc.;
Assistant Vice President (1996-Present) Allstate Life Insurance Company of New
York; Director (1995-1996) Allstate Settlement Corporation; Director
(1991-1996), President and Chief Operating Officer (1995-1996) and Vice
President (1990-1995) and (1996-Present) Glenbrook Life Insurance Company;
Director (1992-1996), President and Chief Operating Officer (1995-1996) and Vice
President (1992-1995) and (1996-Present) Glenbrook Life and Annuity Company; and
Director and Vice Chairman of the Board (1995-1996) Laughlin Group Holdings,
Inc.
 
KAREN C. GARDNER, 44, Vice President (1996)*
 
Vice President (1996-Present) Allstate Insurance Company; Vice President
(1996-Present) Allstate Life Insurance Company; Vice President (1996-Present)
Allstate Life Insurance Company of New York; Vice President (1996-Present)
Glenbrook Life Insurance Company; Vice President (1996-Present) Laughlin Group
Holdings, Inc.; Assistant Vice President (1996-Present) Lincoln Benefit Life
Company; Vice President (1996-Present) Northbrook Life Insurance Company;
Assistant Vice President (1996-Present) Surety Life Insurance Company. Prior to
1996 she was a Partner (1975-1996) Ernst & Young LLP.
 
KEVIN R. SLAWIN, 39, Director and Vice President (1996)*
 
Also Assistant Vice President and Assistant Treasurer (1995-1996) Allstate
Insurance Company; Director (1996-Present) and Assistant Treasurer (1995-1996)
Allstate Financial Services, Inc.; Director and Vice President (1996-Present)
and Assistant Treasurer (1995-1996) Allstate Life Insurance Company; Director
and Vice
 
                                       18
<PAGE>
President (1996-Present) and Assistant Treasurer (1995-1996) Allstate Life
Insurance Company of New York; Director and Vice President (1996-Present) and
Assistant Treasurer (1995-1996) Glenbrook Life Insurance Company; Vice President
(1996-Present) and Assistant Treasurer (1995-1996) Glenbrook Life and Annuity
Company; Director (1996-Present) and Assistant Treasurer (1995-1996) Laughlin
Group Holdings, Inc.; Director (1996-Present) Lincoln Benefit Life Company;
Director (1996-Present) Surety Life Insurance Company; Assistant Treasurer and
Director (1994-1995) Sears Roebuck and Company; and Treasurer and First Vice
President (1986-1994) Sears Mortgage Corporation.
 
CASEY J. SYLLA, 54, Chief Investment Officer and Director (1995)*
 
Also Director (1995-Present) Senior Vice President and Chief Investment Officer
(1995-Present) Allstate Insurance Company; Director (1995-Present) Chief
Investment Officer (1995-Present) Allstate Life Insurance Company; Chief
Investment Officer (1995-Present) Allstate Life Insurance Company of New York;
Chief Investment Officer (1995-Present) Glenbrook Life Insurance Company; Chief
Investment Officer (1995-Present) Glenbrook Life and Annuity Company; Prior to
1995 he was Senior Vice President and Executive Officer--Investments (1992-1995)
of Northwestern Mutual Life Insurance Company.
 
JAMES P. ZILS, 46, Treasurer (1995)*
 
Also Vice President and Treasurer (1995-Present) Allstate Insurance Company;
Treasurer (1995-Present) Allstate Life Financial Services, Inc.; Treasurer
(1995-Present) Allstate Life Insurance Company; Treasurer (1995-Present)
Allstate Life Insurance Company of New York; Treasurer (1995-Present) Glenbrook
Life Insurance Company; Treasurer (1995-Present) Glenbrook Life and Annuity
Company; and Treasurer (1995-Present) Laughlin Group Holdings, Inc. From 1995 to
1993 he was Vice President of Allstate Life Insurance Company. Prior to 1993 he
held various management positions.
- ------------------------
* Date elected to current office
 
DISTRIBUTION OF THE CONTRACTS
- -----------------------------------------------------------
 
The Contracts will be distributed exclusively by Dean Witter which serves as the
principal underwriter of the Contracts under a general agency agreement with the
Company.
 
Dean Witter is a wholly owned subsidiary of Morgan Stanley, Dean Witter,
Discover & Co. Dean Witter is located at Two World Trade Center, New York, New
York. Dean Witter is a member of the New York Stock Exchange and the National
Association of Securities Dealers.
 
The Company may pay up to a maximum sales commission of 6.75%. Dean Witter will
pay annually to its Account Executives from its profits, an amount equal to .10%
of the net assets of the Variable Account attributable to the Contracts. In
addition, sale of the Contract may count toward incentive program awards for the
Account Executive.
 
SAFEKEEPING OF THE VARIABLE ACCOUNT'S ASSETS
- -----------------------------------------------------------
 
The assets of the Variable Account are held by the Company. The assets of the
Variable Account are kept physically segregated and held separate and apart from
the general account of the Company. The Company maintains records of all
purchases and redemptions of shares of the Fund.
 
                                       19
<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 purchase of a life insurance contract depend upon
the individual circumstances of each person. If you are concerned about any tax
consequences with regard to your individual circumstances, you should consult a
qualified tax advisor.
 
TAXATION OF THE COMPANY AND THE VARIABLE ACCOUNT
 
The Company is taxed as a life insurance company under Part I of Subchapter L of
the Internal Revenue Code. Since the Variable Account is not an entity separate
from the Company and its operations form a part of the Company, it will not be
taxed separately as a "Regulated Investment Company" under Subchapter M of the
Code. Investment income and realized capital gains are automatically applied to
increase reserves under the Contracts. Under existing federal income tax law,
the Company believes that the Variable Account investment income and realized
net capital gains will not be taxed to the extent that such income and gains are
applied to increase the reserves under the Contracts. Accordingly, the Company
does not anticipate that it will incur any federal income tax liability
attributable to the Variable Account, and therefore the Company does not intend
to make provisions for any such taxes. However, if changes in the federal tax
laws or interpretations thereof result in the Company being taxed on income or
gains attributable to the Variable Account, then the Company may impose a charge
against the Variable Account (with respect to some or all Contracts) in order to
set aside provisions to pay such taxes.
 
TAXATION OF CONTRACT BENEFITS
 
In order to qualify as a life insurance contract for federal income tax
purposes, the Contract must meet the definition of a life insurance contract set
forth in Section 7702 of the Code. Section 7702 limits the amount of premiums
that may be invested in a contract that is treated as life insurance. The manner
in which Section 7702 should be applied to certain features of the Contract
offered in this prospectus is not directly addressed in Section 7702.
Nevertheless, the Company believes that the Contact will meet the Section 7702
definition of a life insurance contract. This means that:
 
    - the death benefit should be fully excludable from the gross income of the
      beneficiary under Section 101(a)(1) of the Code; and
 
    - the Contract Owner should not be considered in constructive receipt of the
      Cash Value of the Contract, including any increases, until actual
      cancellation of the Contract
 
In addition, in the absence of final regulations or other pertinent
interpretations of Section 7702, there is necessarily some uncertainty as to
whether a substandard risk Contract will meet the statutory life insurance
contract definition. If a Contract were determined not to be a life insurance
contract for purposes of Section 7702, such Contract would not provide most of
the tax advantages normally provided by a life insurance contract. The Company
reserves the right to amend the Contracts to comply with any future changes in
the Code, any regulations or rulings under the Code and any other requirements
imposed by the Internal Revenue Service.
 
If you own and are the Insured under the Contract, the Death Benefit will be
included in your gross estate for federal estate tax purposes if the proceeds
are payable to your estate. If the beneficiary is other than your estate but you
retained incidents of ownership in the Contract, the Death Benefit will also be
included in your gross estate. Examples of incidents of ownership include, but
are not limited to, the right to change beneficiaries, to assign the Contract or
revoke an assignment, to pledge the Contract or to obtain a policy loan. If you
own and are the Insured under the
 
                                       20
<PAGE>
Contract and you transfer all incidents of ownership in the Contract, the Death
Benefit will be included in your gross estate if you die within three years from
the date of the ownership transfer. State and local estate and inheritance tax
consequences may also apply. In addition, certain transfers of the Contract or
Death Benefit, either during life or at death, to individuals (or trusts for the
benefit of such individuals) two or more generations below that of the
transferor may be subject to the federal generation skipping transfer tax. In
addition, the Contract may be used in various arrangements, including
nonqualified deferred compensation or salary continuance plans, split dollar
insurance plans, executive bonus plans, retiree medical benefit plans, and
others. The tax consequences of such plans may vary depending on the particular
facts and circumstances of each individual arrangement. Therefore, if you are
contemplating the use of a Contract in any arrangement the value of which
depends in part on its tax consequences, you should be sure to consult a
qualified tax advisor regarding the tax attributes of the particular
arrangement.
 
MODIFIED ENDOWMENT CONTRACTS
 
A life insurance contract is treated as a "modified endowment contract" under
Section 7702A of the Code if it meets the definition of life insurance in
Section 7702 but fails the "seven-pay" test of Section 7702A. The seven-pay test
provides that premiums cannot be paid at a rate more rapidly than that allowed
by the payment of seven annual premiums using specified computational rules
provided in Section 7702A(c). The large single premium permitted under the
Contract (which is equal to 100% of the "Guideline Single Premium" as defined in
Section 7702 of the Code) does not meet the specified computational rules for
the "seven-pay test" under Section 7702A(c). Therefore, the Contract will
generally be treated as a modified endowment contract for federal income tax
purposes. However, an exchange of a life insurance contract that is not a
modified endowment contract will not cause the new contract to be a modified
endowment contract if no additional premiums are paid. An exchange under Section
1035 of the Code of a life insurance contract that is a modified endowment
contract for a new life insurance contract will always cause the new contract to
be a modified endowment contract. A contract that is classified as a modified
endowment contract is generally eligible for the beneficial tax treatment
accorded to life insurance. Accordingly, the death benefit is excluded from
income and increments in value are not subject to current taxation. If a person
receives any amount as a policy loan from a modified endowment contract, or
assigns or pledges any part of the value of the contract, such amount is treated
as a distribution. Unlike other life insurance contracts, distributions received
before the insured's death are treated first as income (to the extent of gain)
and then as recovery of investment in the contract. Any amounts that are taxable
withdrawals will be subject to a 10% additional tax, with certain exceptions:
(1) distributions made on or after the date on which the taxpayer attains age
59 1/2; (2) distributions attributable to the taxpayer's becoming disabled
(within the meaning of Section 72(m)(7) of the Code); or (3) any distribution
that is part of a series of substantially equal periodic payments (not less
frequently than annually) made for the life (or life expectancy) of the taxpayer
or the joint lives (or joint life expectancies) of such taxpayer and his or her
beneficiary.
 
All modified endowment contracts that are issued within any calendar year to the
same Contract Owner by one company or its affiliates shall be treated as one
modified endowment contract in determining the taxable portion of any loan or
distributions.
 
DIVERSIFICATION REQUIREMENTS
 
For a Contract to be treated as a variable life insurance contract for federal
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 a variable life insurance
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, the Treasury Department 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 Variable
Account. In those circumstances, income and gain from the Variable Account
assets would be includible in the Contract Owner's gross income. In addition,
 
                                       21
<PAGE>
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 Department'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 contract
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.
 
POLICY LOAN INTEREST
 
Interest paid on loans against a Contract is generally not deductible.
 
ADDITIONAL INFORMATION ABOUT THE COMPANY
- -----------------------------------------------------------
 
The Company also acts as the sponsor for two other of its separate accounts that
are registered investment companies: Northbrook Variable Annuity Account and
Northbrook Variable Annuity Account II. The officers and employees of the
Company are covered by a fidelity bond in the amount of $5,000,000. No person
beneficially owns more than 5% of the outstanding voting stock of The Allstate
Corporation, of which the Company is an indirect wholly owned subsidiary.
 
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 or the Variable
Account.
 
LEGAL MATTERS
- -----------------------------------------------------------
 
Sutherland, Asbill & Brennan, L.L.P., 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.
 
REGISTRATION STATEMENT
- -----------------------------------------------------------
 
A registration statement has been filed with the Securities and Exchange
Commission under the Securities Act of 1933, as amended. This Prospectus does
not contain all information set forth in the registration statement, its
amendments and exhibits, to all of which reference is made for further
information concerning the Variable Account, the Fund, the Company, and the
Contracts.
 
                                       22
<PAGE>
EXPERTS
- -----------------------------------------------------------
 
The financial statements of the Company as of December 31, 1996 and 1995 and for
each of the three years in the period ended December 31, 1996 and the related
financial statement schedule included in this prospectus have been audited by
Deloitte & Touche LLP, Two Prudential Plaza, 180 North Stetson Avenue, Chicago,
IL 60601-6779, independent auditors, as stated in their report appearing herein,
and are included in reliance upon the report of such firm given upon their
authority as experts in accounting and auditing.
 
The hypothetical Contract illustrations included in this Prospectus have been
approved by Diana Montigney, FSA, Allstate Life Insurance Company, and are
included in reliance upon her opinion as to their reasonableness.
 
FINANCIAL INFORMATION
- -----------------------------------------------------------
 
Financial statements for the Variable Account are not included herein because,
as of the date of this Prospectus, sales of the Contracts had not commenced and
the Variable Account therefore had no assets. The financial statements for the
Company appearing immediately below should be considered as bearing only on the
ability of the Company to fulfill its obligations under the Contracts. They do
not relate to the investment performance of the Variable Account.
 
                                       23
<PAGE>
INDEPENDENT AUDITORS' REPORT
- -----------------------------------------------------------
 
TO THE BOARD OF DIRECTORS AND SHAREHOLDER OF
NORTHBROOK LIFE INSURANCE COMPANY:
 
We have audited the accompanying Statements of Financial Position of Northbrook
Life Insurance Company (the "Company") as of December 31, 1996 and 1995, and the
related Statements of Operations, Shareholder's Equity and Cash Flows for each
of the three years in the period ended December 31, 1996. 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 Northbrook Life Insurance Company as of
December 31, 1996 and 1995, and the results of its operations and its cash flows
for each of the three years in the period ended December 31, 1996 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.
 
/s/ DELOITTE & TOUCHE LLP
 
Chicago, Illinois
February 21, 1997
 
                                      F-1
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
STATEMENTS OF FINANCIAL POSITION
- -----------------------------------------------------------
($ IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                                                  DECEMBER 31,
                                                                             ----------------------
                                                                                1996        1995
                                                                             ----------  ----------
<S>                                                                          <C>         <C>
ASSETS
  Investments
    Fixed income securities, at fair value (amortized cost $65,500 and
     $59,142)..............................................................  $   67,479  $   63,229
    Short-term.............................................................       6,590       8,049
                                                                             ----------  ----------
        Total investments..................................................      74,069      71,278
  Reinsurance recoverable from Allstate Life Insurance Company.............   2,480,034   2,636,981
  Cash.....................................................................      --              87
  Net receivable from Allstate Life Insurance Company......................       4,505       6,183
  Other assets.............................................................       2,639       2,164
  Separate Accounts........................................................   4,354,783   3,354,910
                                                                             ----------  ----------
        Total assets.......................................................  $6,916,030  $6,071,603
                                                                             ----------  ----------
                                                                             ----------  ----------
LIABILITIES
  Reserve for life-contingent contract benefits............................  $  143,346  $  139,509
  Contractholder funds.....................................................   2,336,296   2,497,278
  Income taxes payable.....................................................         814         233
  Deferred income taxes....................................................       2,085       2,798
  Separate Accounts........................................................   4,354,783   3,354,910
                                                                             ----------  ----------
        Total liabilities..................................................   6,837,324   5,994,728
                                                                             ----------  ----------
SHAREHOLDER'S EQUITY
  Common stock, $100 par value, 25,000 shares authorized, issued and
   outstanding.............................................................       2,500       2,500
  Additional capital paid-in...............................................      56,600      56,600
  Unrealized net capital gains.............................................       1,286       2,657
  Retained income..........................................................      18,320      15,118
                                                                             ----------  ----------
        Total shareholder's equity.........................................      78,706      76,875
                                                                             ----------  ----------
        Total liabilities and shareholder's equity.........................  $6,916,030  $6,071,603
                                                                             ----------  ----------
                                                                             ----------  ----------
</TABLE>
 
                       See notes to financial statements.
 
                                      F-2
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
STATEMENTS OF OPERATIONS
- -----------------------------------------------------------
($ IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                     YEAR ENDED DECEMBER
                                                             31,
                                                    ----------------------
                                                     1996    1995    1994
                                                    ------  ------  ------
<S>                                                 <C>     <C>     <C>
REVENUES
  Net investment income...........................  $4,888  $4,782  $2,881
  Realized capital gains and losses...............     (20)     67    (193)
                                                    ------  ------  ------
INCOME BEFORE INCOME TAX EXPENSE..................   4,868   4,849   2,688
INCOME TAX EXPENSE................................   1,666   1,686     955
                                                    ------  ------  ------
NET INCOME........................................  $3,202  $3,163  $1,733
                                                    ------  ------  ------
                                                    ------  ------  ------
</TABLE>
 
                       See notes to financial statements.
 
                                      F-3
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
STATEMENTS OF SHAREHOLDER'S EQUITY
- -----------------------------------------------------------
($ IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                     YEAR ENDED DECEMBER 31,
                                                    -------------------------
                                                     1996     1995     1994
                                                    -------  -------  -------
<S>                                                 <C>      <C>      <C>
COMMON STOCK......................................  $ 2,500  $ 2,500  $ 2,500
                                                    -------  -------  -------
ADDITIONAL CAPITAL PAID-IN
  Balance, beginning of year......................   56,600   56,600   31,600
    Capital contribution..........................    --       --      25,000
                                                    -------  -------  -------
  Balance, end of year............................   56,600   56,600   56,600
                                                    -------  -------  -------
UNREALIZED NET CAPITAL GAINS
  Balance, beginning of year......................    2,657   (1,553)     747
    Net (decrease) increase.......................   (1,371)   4,210   (2,300)
                                                    -------  -------  -------
  Balance, end of year............................    1,286    2,657   (1,553)
                                                    -------  -------  -------
RETAINED INCOME
  Balance, beginning of year......................   15,118   11,955   10,222
    Net income....................................    3,202    3,163    1,733
                                                    -------  -------  -------
  Balance, end of year............................   18,320   15,118   11,955
                                                    -------  -------  -------
        Total shareholder's equity................  $78,706  $76,875  $69,502
                                                    -------  -------  -------
                                                    -------  -------  -------
</TABLE>
 
                       See notes to financial statements.
 
                                      F-4
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
STATEMENTS OF CASH FLOWS
- -----------------------------------------------------------
($ IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                      YEAR ENDED DECEMBER 31,
                                                    ----------------------------
                                                      1996      1995      1994
                                                    --------  --------  --------
<S>                                                 <C>       <C>       <C>
CASH FLOWS FROM OPERATING ACTIVITIES
  Net income......................................  $  3,202  $  3,163  $  1,733
  Adjustments to reconcile net income to net cash
   provided by (used in) operating activities
    Amortization and other non-cash items.........       782       903       640
    Realized capital losses (gains)...............        20       (67)      193
    (Decrease) increase in life-contingent
     contract benefits and contractholder funds...      (198)      113       (58)
    Change in deferred income taxes...............        24       608      (114)
    Changes in other operating assets and
     liabilities..................................       864    (2,705)   (3,835)
                                                    --------  --------  --------
        Net cash provided by (used in) operating
         activities...............................     4,694     2,015    (1,441)
                                                    --------  --------  --------
CASH FLOWS FROM INVESTING ACTIVITIES
  Fixed income securities
  Proceeds from sales.............................     3,522     5,423     1,256
  Investment collections..........................     5,770     7,108     7,626
  Investment purchases............................   (15,532)   (9,843)  (36,071)
  Change in short-term investments, net...........     1,459    (4,675)    3,475
                                                    --------  --------  --------
        Net cash used in investing activities.....    (4,781)   (1,987)  (23,714)
                                                    --------  --------  --------
CASH FLOWS FROM FINANCING ACTIVITIES
  Capital contribution............................     --        --       25,000
                                                    --------  --------  --------
      Net cash provided by financing activities...     --        --       25,000
                                                    --------  --------  --------
NET (DECREASE) INCREASE IN CASH...................       (87)       28      (155)
CASH AT BEGINNING OF YEAR.........................        87        59       214
                                                    --------  --------  --------
CASH AT END OF YEAR...............................  $  --     $     87  $     59
                                                    --------  --------  --------
                                                    --------  --------  --------
</TABLE>
 
                       See notes to financial statements.
 
                                      F-5
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
NOTES TO FINANCIAL STATEMENTS
- -----------------------------------------------------------
($ IN THOUSANDS)
 
1. GENERAL
BASIS OF PRESENTATION
 
The accompanying financial statements include the accounts of Northbrook Life
Insurance Company (the "Company"), a wholly owned subsidiary of Allstate Life
Insurance Company ("ALIC"), which is wholly owned by Allstate Insurance Company
("AIC"), 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"). These financial statements have been
prepared in conformity with generally accepted accounting principles.
 
To conform with the 1996 presentation, certain items in the prior years'
financial statements and notes have been reclassified.
 
NATURE OF OPERATIONS
 
The Company markets life insurance contracts and various annuity products in the
United States through Dean Witter Reynolds Inc. ("Dean Witter") (see Note 4), a
wholly owned subsidiary of Dean Witter, Discover & Co. ("Dean Witter Discover").
Life insurance contracts sold by the Company include universal life and other
interest-sensitive life products. Annuities include deferred annuities, such as
variable annuities and fixed rate single and flexible premium annuities, and
immediate annuities.
 
Annuity and life insurance 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 ALIC (see Note
3), which invests premiums and deposits to create cash flows that will fund
future benefits and expenses. In order to support competitive credited rates,
ALIC adheres to a basic philosophy of matching assets with related liabilities
to limit interest rate risk, while maintaining adequate liquidity and a prudent
and diversified level of credit risk.
 
The Company monitors economic and regulatory developments which have the
potential to impact its business. There continues to be proposed federal
legislation and regulation which would allow banks greater participation in
securities and insurance businesses, which could present an increased level of
competition for sales of the Company's annuity contracts. Furthermore, the
market for deferred annuities and interest-sensitive life insurance is enhanced
by the tax incentives available under current law. Any legislative changes which
lessen these incentives are likely to negatively impact the market for these
products.
 
The Company is authorized to sell life and annuity products in all states except
New York, as well as the District of Columbia and Puerto Rico. The top
geographic locations for statutory premiums earned are California, Florida,
Texas and Pennsylvania for the year ended December 31, 1996. No other
jurisdiction accounted for more than 5% of statutory premiums. All premiums and
contract charges are ceded to ALIC under reinsurance agreements.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
INVESTMENTS
 
Fixed income securities include bonds and mortgage-backed securities. All fixed
income securities are carried at fair value and may be sold prior to their
contractual maturity ("available for sale"). The difference between amortized
cost and fair value, net of deferred income taxes, is reflected as a component
of shareholder's equity. Provisions are recognized for declines in the value of
fixed income securities 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.
 
RECOGNITION OF PREMIUM REVENUES AND CONTRACT CHARGES
 
Revenues on interest-sensitive life insurance contracts are comprised of
contract charges and fees, and are recognized when assessed against the
policyholder account balance. Revenues on annuities, which are considered
investment contracts, include contract charges and fees for contract
administration and surrenders. These revenues are recognized when levied against
the contract balances.
 
                                      F-6
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- -----------------------------------------------------------
($ IN THOUSANDS)
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
REINSURANCE
 
The Company and ALIC have reinsurance agreements under which all premiums and
deposits are transferred to ALIC. Premiums, contract charges, credited interest
and policy benefits are ceded and reflected net of such cessions in the
statements of operations. The amounts shown in the Company's statements of
operations relate to the investment of those assets of the Company that are not
transferred to ALIC under reinsurance agreements. Reinsurance recoverable and
the related reserve for life-contingent contract benefits and contractholder
funds are reported separately in the statements of financial position. The
Company continues to have primary liability as the direct insurer for risks
reinsured.
 
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
regulations. Deferred income taxes also arise from unrealized capital gains or
losses on fixed income securities carried at fair value.
 
SEPARATE ACCOUNTS
 
The Company issues 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. Assets and liabilities of the Separate Accounts represent
funds of Northbrook Variable Annuity Account and Northbrook Variable Annuity
Account II ("Separate Accounts"), unit investment trusts registered with the
Securities and Exchange Commission.
 
The assets of the Separate Accounts are carried at fair value. Investment income
and realized capital gains and losses of the Separate Accounts accrue directly
to the contractholders and, therefore, are not included in the Company's
statements of operations. Revenues to the Company from the Separate Accounts
consist of contract maintenance fees, administration fees and mortality and
expense risk charges, which are ceded to ALIC.
 
RESERVE FOR LIFE-CONTINGENT CONTRACT BENEFITS
 
The reserve for life-contingent contract benefits, which relates to structured
settlement annuities and supplemental contracts with life contingencies, is
computed on the basis of assumptions as to future investment yields, mortality,
morbidity, terminations and expenses. These assumptions, which for traditional
life are applied using the net level premium method, include provisions for
adverse deviation and generally vary by such characteristics as type of
coverage, year of issue and policy duration. Reserve interest rates ranged from
3.96% to 11.00% during 1996.
 
CONTRACTHOLDER FUNDS
 
Contractholder funds arise from the issuance of individual or group contracts
that include an investment component, including most annuities and
interest-sensitive life insurance contracts. Payments received are recorded as
interest-bearing liabilities. Contractholder funds are equal to deposits
received and interest credited to the benefit of the contractholder less
withdrawals, mortality charges and administrative expenses. During 1996,
credited interest rates on contractholder funds ranged from 3.10% to 9.51% for
those contracts with fixed interest rates and from 3.25% to 7.86% for those with
flexible rates.
 
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. RELATED PARTY TRANSACTIONS
REINSURANCE
 
Premiums and contract charges ceded to ALIC were $3,024 and $60,744 in 1996,
$2,284 and $52,348 in 1995, and $1,886 and $38,306 in 1994. Credited interest,
policy benefits and expenses ceded to ALIC amounted to $207,752, $229,525 and
$243,326 in 1996, 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 are owned and managed by ALIC under the
terms of reinsurance agreements.
 
                                      F-7
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- -----------------------------------------------------------
($ IN THOUSANDS)
 
3. RELATED PARTY TRANSACTIONS (CONTINUED)
BUSINESS OPERATIONS
 
The Company utilizes services and business facilities owned or leased, and
operated by AIC in conducting its business activities. The Company reimburses
AIC for the operating expenses incurred by AIC 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 $8,074, $5,341 and $5,483 in 1996, 1995 and 1994, respectively. Of these
costs, the Company retains investment related expenses. All other costs are
ceded to ALIC under reinsurance agreements.
 
4. EXCLUSIVE DISTRIBUTION AGREEMENT
 
The Company and ALIC have formed a strategic alliance with Dean Witter to
develop, market and distribute proprietary annuity and life insurance products
through Dean Witter account executives. Dean Witter provides a portion of the
funding for these products through loans to an affiliate of the Company.
 
Under the terms of the strategic alliance, which is cancelable by either party,
the Company has agreed to use Dean Witter as an exclusive distribution channel
for the Company's products. Dean Witter Discover's wholly owned subsidiary, Dean
Witter Intercapital Inc., is the investment manager for the Dean Witter Variable
Investment Series, the fund in which the assets of the Separate Accounts are
invested.
 
On February 5, 1997, Dean Witter Discover and Morgan Stanley Group Inc.
announced that they had entered into an agreement and plan of merger, with the
combined company to be named Morgan Stanley, Dean Witter, Discover & Co. The
parties to the merger anticipate that the transaction will close in mid-1997.
The Company does not expect the merger to have a significant impact on its
business.
 
5. INVESTMENTS
FAIR VALUES
 
The amortized cost, gross unrealized gains and losses and fair value for fixed
income securities are as follows:
<TABLE>
<CAPTION>
                                                                                          GROSS UNREALIZED
                                                                           AMORTIZED   ----------------------    FAIR
AT DECEMBER 31, 1996                                                         COST        GAINS     (LOSSES)      VALUE
- ------------------------------------------------------------------------  -----------  ---------  -----------  ---------
<S>                                                                       <C>          <C>        <C>          <C>
U.S. government and agencies............................................   $   8,629   $     193   $     (54)  $   8,768
Municipal...............................................................         873          48      --             921
Corporate...............................................................      16,902         260         (69)     17,093
Mortgage-backed securities..............................................      39,096       1,883        (282)     40,697
                                                                          -----------  ---------       -----   ---------
    Total fixed income securities.......................................   $  65,500   $   2,384   $    (405)  $  67,479
                                                                          -----------  ---------       -----   ---------
                                                                          -----------  ---------       -----   ---------
 
<CAPTION>
 
                                                                                          GROSS UNREALIZED
                                                                           AMORTIZED   ----------------------    FAIR
AT DECEMBER 31, 1995                                                         COST        GAINS     (LOSSES)      VALUE
- ------------------------------------------------------------------------  -----------  ---------  -----------  ---------
<S>                                                                       <C>          <C>        <C>          <C>
U.S. government and agencies............................................   $   8,619   $     880   $  --       $   9,499
Municipal...............................................................       1,583          83      --           1,666
Corporate...............................................................       4,967         349      --           5,316
Mortgage-backed securities..............................................      43,973       3,003        (228)     46,748
                                                                          -----------  ---------       -----   ---------
    Total fixed income securities.......................................   $  59,142   $   4,315   $    (228)  $  63,229
                                                                          -----------  ---------       -----   ---------
                                                                          -----------  ---------       -----   ---------
</TABLE>
 
                                      F-8
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- -----------------------------------------------------------
($ IN THOUSANDS)
 
5. INVESTMENTS (CONTINUED)
SCHEDULED MATURITIES
 
The scheduled maturities for fixed income securities are as follows at December
31, 1996:
 
<TABLE>
<CAPTION>
                                                                                               AMORTIZED     FAIR
                                                                                                 COST        VALUE
                                                                                              -----------  ---------
<S>                                                                                           <C>          <C>
Due in one year or less.....................................................................   $      60   $      60
Due after one year through five years.......................................................       3,416       3,525
Due after five years through ten years......................................................      15,706      15,958
Due after ten years.........................................................................       7,222       7,239
                                                                                              -----------  ---------
                                                                                                  26,404      26,782
Mortgage-backed securities..................................................................      39,096      40,697
                                                                                              -----------  ---------
    Total...................................................................................   $  65,500   $  67,479
                                                                                              -----------  ---------
                                                                                              -----------  ---------
</TABLE>
 
Actual maturities may differ from those scheduled as a result of prepayments by
the issuers.
 
NET INVESTMENT INCOME
 
<TABLE>
<CAPTION>
                                                                                            YEAR ENDED DECEMBER 31,
                                                                                        -------------------------------
                                                                                          1996       1995       1994
                                                                                        ---------  ---------  ---------
<S>                                                                                     <C>        <C>        <C>
Fixed income securities...............................................................  $   4,675  $   4,633  $   2,735
Short-term............................................................................        390        215        192
                                                                                        ---------  ---------  ---------
    Investment income, before expense.................................................      5,065      4,848      2,927
    Investment expense................................................................        177         66         46
                                                                                        ---------  ---------  ---------
    Net investment income.............................................................  $   4,888  $   4,782  $   2,881
                                                                                        ---------  ---------  ---------
                                                                                        ---------  ---------  ---------
</TABLE>
 
REALIZED CAPITAL GAINS AND LOSSES
 
<TABLE>
<CAPTION>
                                                                                            YEAR ENDED DECEMBER 31,
                                                                                        -------------------------------
                                                                                          1996       1995       1994
                                                                                        ---------  ---------  ---------
<S>                                                                                     <C>        <C>        <C>
Fixed income securities...............................................................  $     (20) $      67  $    (193)
Income tax benefit (expense)..........................................................          7        (23)        68
                                                                                        ---------  ---------  ---------
Realized capital losses and gains, after tax..........................................  $     (13) $      44  $    (125)
                                                                                        ---------  ---------  ---------
                                                                                        ---------  ---------  ---------
</TABLE>
 
PROCEEDS FROM SALES OF FIXED INCOME SECURITIES
 
Proceeds from sales of investments in fixed income securities were $3,522,
$5,423 and $1,256 in 1996, 1995 and 1994, respectively. Gross losses of $32 and
$179 were realized on sales of fixed income securities during 1996 and 1994,
respectively, and gross gains of $67 were recognized during 1995.
 
                                      F-9
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- -----------------------------------------------------------
($ IN THOUSANDS)
 
5. INVESTMENTS (CONTINUED)
UNREALIZED NET CAPITAL GAINS
 
Unrealized net capital gains on fixed income securities included in
shareholder's equity at December 31, 1996 are as follows:
 
<TABLE>
<CAPTION>
                                                                                     COST/
                                                                                   AMORTIZED     FAIR     UNREALIZED
                                                                                     COST        VALUE     NET GAINS
                                                                                  -----------  ---------  -----------
<S>                                                                               <C>          <C>        <C>
Fixed income securities.........................................................   $  65,500   $  67,479   $   1,979
                                                                                  -----------  ---------
                                                                                  -----------  ---------
Deferred income taxes...........................................................                                (693)
                                                                                                               -----
    Unrealized net capital gains................................................                           $   1,286
                                                                                                               -----
                                                                                                               -----
</TABLE>
 
CHANGE IN UNREALIZED NET CAPITAL GAINS
 
<TABLE>
<CAPTION>
                                                     YEAR ENDED DECEMBER 31,
                                                    -------------------------
                                                     1996     1995     1994
                                                    -------  -------  -------
<S>                                                 <C>      <C>      <C>
Fixed income securities...........................  $(2,108) $ 6,477  $(3,539)
Deferred income taxes.............................      737   (2,267)   1,239
                                                    -------  -------  -------
    Change in unrealized net capital gains........  $(1,371) $ 4,210  $(2,300)
                                                    -------  -------  -------
                                                    -------  -------  -------
</TABLE>
 
SECURITIES ON DEPOSIT
 
At December 31, 1996, fixed income securities with a carrying value of $7,376
were on deposit with regulatory authorities as required by law.
 
6. FINANCIAL INSTRUMENTS
 
In the normal course of business, the Company invests in various financial
assets and incurs various financial liabilities. The fair value estimates of
financial instruments are not necessarily indicative of the amounts the Company
might pay or receive in actual market transactions. Potential taxes and other
transaction costs have not been considered in estimating fair value. The
disclosures that follow do not reflect the fair value of the Company as a whole
since a number of the Company's assets (including reinsurance recoverable) and
liabilities (including deferred income taxes and reserve for life-contingent
contract benefits) are not considered financial instruments and are not carried
at fair value. Other assets and liabilities considered financial instruments,
including accrued investment income and cash, are generally of a short-term
nature. It is assumed that their carrying value approximates fair value.
 
FINANCIAL ASSETS
 
<TABLE>
<CAPTION>
                                                                                            AT DECEMBER 31,
                                                                         -----------------------------------------------------
                                                                                   1996                        1995
                                                                         -------------------------   -------------------------
                                                                          CARRYING                    CARRYING
                                                                            VALUE      FAIR VALUE       VALUE      FAIR VALUE
                                                                         -----------   -----------   -----------   -----------
<S>                                                                      <C>           <C>           <C>           <C>
Fixed income securities...............................................   $    67,479   $    67,479   $    63,229   $    63,229
Short-term investments................................................         6,590         6,590         8,049         8,049
Separate Accounts.....................................................     4,354,783     4,354,783     3,354,910     3,354,910
</TABLE>
 
Fair values for fixed income securities are based on quoted market prices.
Short-term investments are highly liquid investments with maturities of less
than one year whose carrying value approximates fair value. Assets of the
Separate Accounts are carried in the statements of financial position at fair
value.
 
                                      F-10
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- -----------------------------------------------------------
($ IN THOUSANDS)
 
6. FINANCIAL INSTRUMENTS (CONTINUED)
FINANCIAL LIABILITIES
 
<TABLE>
<CAPTION>
                                                                   AT DECEMBER 31,
                                                  --------------------------------------------------
                                                            1996                      1995
                                                  ------------------------  ------------------------
                                                   CARRYING                  CARRYING
                                                     VALUE     FAIR VALUE      VALUE     FAIR VALUE
                                                  -----------  -----------  -----------  -----------
<S>                                               <C>          <C>          <C>          <C>
Contractholder funds on investment contracts...... $ 2,143,482 $ 2,118,583  $ 2,294,536  $ 2,274,053
Separate Accounts.................................   4,354,783   4,354,783    3,354,910    3,354,910
</TABLE>
 
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 account balance less surrender charges. The fair value of
immediate annuities and annuities without life contingencies with fixed terms is
estimated using discounted cash flow calculations based on interest rates
currently offered for contracts with similar terms and durations. Separate
Account liabilities are carried at the fair value of the underlying assets.
 
7. INCOME TAXES
 
Consolidated federal income tax returns are filed by the Corporation and its
eligible subsidiaries, including the Company. Tax liabilities and benefits
realized by the consolidated group are allocated as generated by the respective
entities.
 
Prior to the Distribution, the Corporation and all of its domestic subsidiaries,
including the Company (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"). 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 Company 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 recognized in a separate return, were
allocated according to the Tax Sharing Agreement.
 
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.
 
The components of the net deferred income tax liability at December 31, 1996 and
1995 are as follows:
 
<TABLE>
<CAPTION>
                                                                               AT DECEMBER 31,
                                                                             --------------------
                                                                               1996       1995
                                                                             ---------  ---------
<S>                                                                          <C>        <C>
Difference in tax bases of investments.....................................  $  (1,392) $  (1,368)
Unrealized net capital gains on fixed income securities....................       (693)    (1,430)
                                                                             ---------  ---------
    Total deferred liability...............................................  $  (2,085) $  (2,798)
                                                                             ---------  ---------
                                                                             ---------  ---------
</TABLE>
 
The components of income tax expense are as follows:
 
<TABLE>
<CAPTION>
                                                                           YEAR ENDED DECEMBER 31,
                                                                       -------------------------------
                                                                         1996       1995       1994
                                                                       ---------  ---------  ---------
<S>                                                                    <C>        <C>        <C>
Current..............................................................  $   1,642  $   1,078  $   1,069
Deferred.............................................................         24        608       (114)
                                                                       ---------  ---------  ---------
    Total income tax expense.........................................  $   1,666  $   1,686  $     955
                                                                       ---------  ---------  ---------
                                                                       ---------  ---------  ---------
</TABLE>
 
                                      F-11
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
NOTES TO FINANCIAL STATEMENTS (CONTINUED)
- -----------------------------------------------------------
($ IN THOUSANDS)
 
7. INCOME TAXES (CONTINUED)
The Company paid income taxes of $2,308, $1,555 and $1,393 in 1996, 1995 and
1994, respectively, to ALIC. The Company had income taxes payable to ALIC of
$814 and $233 at December 31, 1996 and 1995, 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,
                                                                       -------------------------------
                                                                         1996       1995       1994
                                                                       ---------  ---------  ---------
<S>                                                                    <C>        <C>        <C>
Balance per generally accepted accounting principles.................  $   3,202  $   3,163  $   1,733
    Deferred income taxes............................................         24        608       (114)
    Non-admitted assets and statutory reserves.......................       (661)    (1,471)       (27)
                                                                       ---------  ---------  ---------
Balance per statutory accounting practices...........................  $   2,565  $   2,300  $   1,592
                                                                       ---------  ---------  ---------
                                                                       ---------  ---------  ---------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                            SHAREHOLDER'S EQUITY
                                                                            --------------------
                                                                              AT DECEMBER 31,
                                                                            --------------------
                                                                              1996       1995
                                                                            ---------  ---------
<S>                                                                         <C>        <C>
Balance per generally accepted accounting principles......................  $  78,706  $  76,875
    Deferred income taxes.................................................      2,085      2,798
    Unrealized gain/loss on fixed income securities.......................     (1,979)    (4,087)
    Non-admitted assets and statutory reserves............................     (2,503)    (2,001)
    Other.................................................................     (1,211)      (520)
                                                                            ---------  ---------
Balance per statutory accounting practices................................  $  75,098  $  73,065
                                                                            ---------  ---------
                                                                            ---------  ---------
</TABLE>
 
PERMITTED STATUTORY ACCOUNTING PRACTICES
 
The Company prepares its statutory financial statements in accordance with
accounting principles and practices prescribed or permitted by the Illinois
Department of Insurance. 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 1997 without prior approval of both the Illinois and California
Departments of Insurance is $7,260.
 
                                      F-12
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
SCHEDULE IV--REINSURANCE
- -----------------------------------------------------------
($ IN THOUSANDS)
<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31, 1996
 
<S>                                                                              <C>        <C>        <C>
                                                                                   GROSS                  NET
                                                                                  AMOUNT      CEDED     AMOUNT
                                                                                 ---------  ---------  ---------
Life insurance in force........................................................  $ 556,242  $ 556,242  $  --
                                                                                 ---------  ---------  ---------
                                                                                 ---------  ---------  ---------
Premiums and contract charges:
  Life and annuities...........................................................  $  64,519  $  64,519  $  --
                                                                                 ---------  ---------  ---------
                                                                                 ---------  ---------  ---------
 
<CAPTION>
 
YEAR ENDED DECEMBER 31, 1995
 
                                                                                   GROSS                  NET
                                                                                  AMOUNT      CEDED     AMOUNT
                                                                                 ---------  ---------  ---------
<S>                                                                              <C>        <C>        <C>
Life insurance in force........................................................  $ 610,478  $ 610,478  $  --
                                                                                 ---------  ---------  ---------
                                                                                 ---------  ---------  ---------
Premiums and contract charges:
  Life and annuities...........................................................  $  54,632  $  54,632  $  --
                                                                                 ---------  ---------  ---------
                                                                                 ---------  ---------  ---------
<CAPTION>
 
YEAR ENDED DECEMBER 31, 1994
 
                                                                                   GROSS                  NET
                                                                                  AMOUNT      CEDED     AMOUNT
                                                                                 ---------  ---------  ---------
<S>                                                                              <C>        <C>        <C>
Life insurance in force........................................................  $ 661,356  $ 661,356  $  --
                                                                                 ---------  ---------  ---------
                                                                                 ---------  ---------  ---------
Premiums and contract charges:
  Life and annuities...........................................................  $  40,192  $  40,192  $  --
                                                                                 ---------  ---------  ---------
                                                                                 ---------  ---------  ---------
</TABLE>
 
                                      F-13
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
STATEMENTS OF FINANCIAL POSITION
- -----------------------------------------------------------
($ IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                     JUNE 30,             DECEMBER 31,
                                                       1997                   1996
                                                    -----------          ---------------
<S>                                                 <C>                  <C>
                                                    (UNAUDITED)
ASSETS
  Investments
    Fixed income securities at fair value
     (amortized cost $71,856 and $65,500).........  $    73,609          $       67,479
    Short-term....................................        2,039                   6,590
                                                    -----------          ---------------
        Total investments.........................       75,648                  74,069
  Reinsurance recoverable from Allstate Life
   Insurance Company..............................    2,387,681               2,480,034
  Cash............................................           60                --
  Net receivable from Allstate Life Insurance
   Company........................................        3,953                   4,505
  Other assets....................................        3,237                   2,639
  Separate Accounts...............................    5,097,697               4,354,783
                                                    -----------          ---------------
        Total assets                                $ 7,568,276          $    6,916,030
                                                    -----------          ---------------
                                                    -----------          ---------------
LIABILITIES
  Reserve for life-contingent contract benefits...  $   144,340          $      143,346
  Contractholder funds............................    2,242,939               2,336,296
  Income taxes payable............................        1,111                     814
  Deferred income taxes...........................        2,021                   2,085
  Separate Accounts...............................    5,097,697               4,354,783
                                                    -----------          ---------------
        Total liabilities                             7,488,108               6,837,324
                                                    -----------          ---------------
SHAREHOLDER'S EQUITY
  Common stock, $100 par value, 25,000 shares
   authorized, issued and outstanding.............        2,500                   2,500
  Additional capital paid-in......................       56,600                  56,600
  Unrealized net capital gains....................        1,139                   1,286
  Retained income.................................       19,929                  18,320
                                                    -----------          ---------------
        Total shareholder's equity................       80,168                  78,706
                                                    -----------          ---------------
        Total liabilities and shareholder's
       equity.....................................  $ 7,568,276          $    6,916,030
                                                    -----------          ---------------
                                                    -----------          ---------------
</TABLE>
 
                       See notes to financial statements.
 
                                      F-14
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
STATEMENTS OF OPERATIONS
- -----------------------------------------------------------
($ IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                       THREE MONTHS         SIX MONTHS
                                                          ENDED                ENDED
                                                         JUNE 30,            JUNE 30,
                                                    ------------------  -------------------
                                                      1997      1996      1997       1996
                                                    --------   -------  --------   --------
                                                                  (UNAUDITED)
<S>                                                 <C>        <C>      <C>        <C>
REVENUES
  Net investment income...........................  $  1,256   $ 1,187  $  2,528   $  2,407
  Realized capital gains and losses...............       (70)        9       (69)       (22)
                                                    --------   -------  --------   --------
INCOME BEFORE INCOME TAX EXPENSE..................     1,186     1,196     2,459      2,385
INCOME TAX EXPENSE................................       410       419       850        835
                                                    --------   -------  --------   --------
NET INCOME........................................  $    776   $   777  $  1,609   $  1,550
                                                    --------   -------  --------   --------
                                                    --------   -------  --------   --------
</TABLE>
 
                       See notes to financial statements.
 
                                      F-15
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
STATEMENTS OF CASH FLOWS
- -----------------------------------------------------------
($ IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                        SIX MONTHS
                                                       ENDED JUNE 30
                                                  -----------------------
                                                     1997         1996
                                                  ----------   ----------
                                                        (UNAUDITED)
<S>                                               <C>          <C>
CASH FLOWS FROM OPERATING ACTIVITIES
Net income........................................ $    1,609  $    1,550
Adjustments to reconcile net income to net cash
  provided by operating activities
  Amortization and other non-cash items...........        179         303
  Realized capital gains and losses...............         69          22
  (Decrease) Increase in life-contingent contract
   benefits and contractholder funds..............        (10)        (50)
  Change in deferred income taxes.................         16          47
  Changes in other operating assets and
   liabilities....................................          5        (112)
                                                  ----------   ----------
        Net cash provided by operating
       activities.................................      1,868       1,760
                                                  ----------   ----------
CASH FLOWS FROM INVESTING ACTIVITIES
Fixed income securities
Proceeds from sales...............................      1,606       2,320
Investment collections............................      2,205       4,510
Investment purchases..............................    (10,170)    (11,341)
Change in short-term investments, net.............      4,551       2,672
                                                  ----------   ----------
        Net cash used in investing activities.....     (1,808)     (1,839)
                                                  ----------   ----------
NET INCREASE (DECREASE) IN CASH...................         60         (79)
CASH AT BEGINNING OF PERIOD.......................         --          87
                                                  ----------   ----------
CASH AT END OF PERIOD............................. $       60  $        8
                                                  ----------   ----------
                                                  ----------   ----------
</TABLE>
 
                       See notes to financial statements.
 
                                      F-16
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
NOTES TO FINANCIAL STATEMENTS
- -----------------------------------------------------------
(UNAUDITED)
 
1. BASIS OF PRESENTATION
 
The accompanying financial statements include the accounts of Northbrook Life
Insurance Company (the "Company"), a wholly owned subsidiary of Allstate Life
Insurance Company ("ALIC"), which is wholly owned by Allstate Insurance Company,
a wholly owned subsidiary of The Allstate Corporation.
 
The statements of financial position as of June 30, 1997, the statements of
operations for the three-month and six-month periods ended June 30, 1997 and
1996, and the statements of cash flows for the six-month periods ended June 30,
1997 and 1996 are unaudited. The interim financial statements reflect all
adjustments (consisting only of normal recurring accruals) which are, in the
opinion of management, necessary for the fair presentation of the financial
position, results of operations and cash flows for the interim periods. The
financial statements should be read in conjunction with the financial statements
and notes thereto included in the Northbrook Life Insurance Company Annual
Report on Form 10K for 1996. The results of operations for the interim period
should not be considered indicative of results to be expected for the full year.
 
2. REINSURANCE
 
The Company and ALIC have reinsurance agreements under which all premiums and
deposits are transferred to ALIC. Premiums, contract charges, credited interest
and policy benefits are ceded and reflected net of such cessions in the
statements of operations. The amounts shown in the Company's statements of
operations relate to the investment of those assets of the Company that are not
transferred to ALIC under reinsurance agreements. Reinsurance recoverable and
the related reserve for life-contingent contract benefits and contractholder
funds are reported separately in the statements of financial position. The
Company continues to have primary liability as the direct insurer for risks
reinsured.
 
Premiums and contract charges ceded to ALIC were $258 thousand and $19.1 million
for the three-month period ended June 30, 1997, $563 thousand and $14.9 million
for the three-month period ended June 30, 1996, $820 thousand and $36.6 million
for the six-month period ended June 30, 1997, and $948 thousand and $28.8
million for the six-month period ended June 30, 1996. Credited interest, policy
benefits and expenses ceded to ALIC amounted to $49.0 million and $55.4 million
for the three-month periods ended June 30, 1997 and 1996, respectively and
$101.7 million and $108.8 million for the six-month periods ended June 30, 1997
and 1996, respectively. Investment income earned on the assets which support
contractholder funds is not included in the Company's financial statements as
those assets are owned and managed by ALIC under the terms of reinsurance
agreements.
 
                                      F-17
<PAGE>
APPENDIX A
ILLUSTRATIONS OF ACCOUNT VALUES, CASH SURRENDER VALUES,
DEATH BENEFITS, AND ACCUMULATED PREMIUMS
- ----------------------------------------------------------------------
 
The tables in Appendix A illustrate the way the Contracts operate. They show how
the Death Benefit, Account Value and Cash Surrender Value could vary over an
extended period of time assuming hypothetical gross rates of return (investment
income and capital gains and losses, realized or unrealized) for the Variable
Account equal to annual rates of 0%, 6%, and 12%. The tables are based on an
initial premium of $10,000 and also show the initial Death Benefit based on that
premium. The insureds are assumed to be in the standard underwriting class.
Values are first given based on current Contract charges and then based on
guaranteed Contract charges. (See "Deductions and Charges," page 10.) These
tables may assist in the comparison of Death Benefits, Account Values and Cash
Surrender Values for the Contracts with those under other variable life
insurance contracts that may be issued by other companies.
 
Death Benefits, Account Values and Cash Surrender Values for a Contract would be
different from the amounts shown if the actual gross rates of return averaged
0%, 6% or 12%, but varied above and below that average for the period, if the
initial premium were paid in another amount, or additional payments were made.
They would also be different depending on the allocation of Account Value among
the Variable Account's Variable Sub-Accounts, or if the actual gross rate of
return for all Variable Sub-Accounts averaged 0%, 6% or 12%, but varied above or
below that average for individual Variable Sub-Accounts. They would also differ
if any Contract loan or partial withdrawal were made during the period of time
illustrated, or if the insured were in another risk class.
 
The Death Benefits, Account Values and Cash Surrender Values shown in the tables
reflect the fact that: a Monthly Deduction Amount (consisting of a cost of
insurance charge, tax expense charge, and an administrative expense charge) is
deducted from Account Value each Monthly Activity Date and that an annual
maintenance fee of $30 is deducted on each Contract Anniversary from all
Variable Sub-Accounts to which Account Value is allocated. The values in the
tables also reflect a deduction from the Variable Account of a daily charge
equal to an annual rate of 0.90% for the mortality and expense risk charge. The
Cash Surrender Value shown in the tables reflect the fact that a withdrawal
charge is imposed on withdrawals in excess of the Free Withdrawal Amount. (See
"Deductions and Charges," page 10.) The amounts shown in the table are based on
an average of the investment advisory fees and operating expenses incurred by
the Portfolios, at an annual rate of .75% of the average daily net assets of the
Portfolios. (See "Charges Against the Fund," page 11.)
 
Taking account of the average investment advisory fee and operating expenses of
the Portfolios, the gross annual rates of return of 0%, 6% and 12% correspond to
net investment experience at constant annual rates of: (-.75%, 5.25%, and
11.25%,) respectively.
 
The hypothetical rates of return shown in the tables do not reflect any tax
charges attributable to the Variable Account since no such charges are currently
made. If any such charges are imposed in the future, the gross annual rate of
return would have to exceed the rates shown by an amount sufficient to cover the
tax charges, in order to produce the Account Values, Cash Surrender Values, and
Death Benefits illustrated.
 
The second column of each table shows the amount that would accumulate if the
initial premium of $10,000 were invested to earn interest, after taxes, of 5%
per year, compounded annually.
 
Northbrook Life will furnish upon request a personalized illustration reflecting
the proposed insured's age, sex, and underwriting classification. Where
applicable, Northbrook Life will also furnish upon request an illustration for a
Contract that is not affected by the sex of the insured.
 
                                      A-1
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                               ISSUE AGE 45 MALE
                          INITIAL FACE AMOUNT: $39,998
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 12% (11.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,853      10,003      39,998     10,776       9,926      39,998
          2       11,025       11,781      10,952      39,998     11,619      10,790      39,998
          3       11,576       12,791      11,984      39,998     12,535      11,727      39,998
          4       12,155       13,890      13,147      39,998     13,531      12,787      39,998
          5       12,763       15,087      14,449      39,998     14,615      13,978      39,998
          6       13,401       16,389      15,857      39,998     15,797      15,266      39,998
          7       14,071       17,805      17,380      39,998     17,084      16,659      39,998
          8       14,775       19,347      19,029      39,998     18,489      18,170      39,998
          9       15,513       21,025      20,813      39,998     20,023      19,810      39,998
         10       16,289       22,852      22,852      39,998     21,700      21,700      39,998
         11       17,103       24,964      24,964      39,998     23,634      23,634      39,998
         12       17,959       27,274      27,274      39,998     25,768      25,768      39,998
         13       18,856       29,801      29,801      42,318     28,128      28,128      39,998
         14       19,799       32,569      32,569      44,945     30,735      30,735      42,414
         15       20,789       35,601      35,601      47,705     33,595      33,595      45,017
         16       21,829       38,926      38,926      50,604     36,731      36,731      47,750
         17       22,920       42,560      42,560      54,477     40,159      40,159      51,403
         18       24,066       46,533      46,533      58,631     43,905      43,905      55,321
         19       25,270       50,875      50,875      63,085     48,001      48,001      59,521
         20       26,533       55,623      55,623      67,860     52,479      52,479      64,024
         25       33,864       86,898      86,898      100,801    81,877      81,877      94,977
         35       55,160       214,370     214,370     225,088    201,730     201,730     211,817
</TABLE>
 
(1)  Values reflect investment results using current cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 12% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-2
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                               ISSUE AGE 45 MALE
                          INITIAL FACE AMOUNT: $39,998
 
     ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 6% (5.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,266       9,416      39,998     10,189       9,339      39,998
          2       11,025       10,540       9,711      39,998     10,374       9,545      39,998
          3       11,576       10,822      10,014      39,998     10,554       9,746      39,998
          4       12,155       11,112      10,368      39,998     10,728       9,984      39,998
          5       12,763       11,411      10,773      39,998     10,895      10,258      39,998
          6       13,401       11,718      11,187      39,998     11,054      10,523      39,998
          7       14,071       12,035      11,610      39,998     11,201      10,776      39,998
          8       14,775       12,361      12,042      39,998     11,333      11,015      39,998
          9       15,513       12,697      12,484      39,998     11,448      11,236      39,998
         10       16,289       13,043      13,043      39,998     11,543      11,543      39,998
         11       17,103       13,466      13,466      39,998     11,662      11,662      39,998
         12       17,959       13,904      13,904      39,998     11,758      11,758      39,998
         13       18,856       14,357      14,357      39,998     11,829      11,829      39,998
         14       19,799       14,826      14,826      39,998     11,869      11,869      39,998
         15       20,789       15,311      15,311      39,998     11,877      11,877      39,998
         16       21,829       15,814      15,814      39,998     11,845      11,845      39,998
         17       22,920       16,333      16,333      39,998     11,765      11,765      39,998
         18       24,066       16,871      16,871      39,998     11,630      11,630      39,998
         19       25,270       17,427      17,427      39,998     11,428      11,428      39,998
         20       26,533       18,003      18,003      39,998     11,149      11,149      39,998
         25       33,864       21,196      21,196      39,998      8,131       8,131      39,998
         35       55,160       29,477      29,477      39,998        *           *           *
</TABLE>
 
*  When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 6% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-3
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                               ISSUE AGE 45 MALE
                          INITIAL FACE AMOUNT: $39,998
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 0% (-0.75% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS             CURRENT CHARGES(1)                  GUARANTEED CHARGES(2)
                ACCUMULATED   -----------------------------------  -----------------------------------
   END OF          AT 5%                      CASH                                 CASH
  CONTRACT       INTEREST       ACCOUNT     SURRENDER     DEATH      ACCOUNT     SURRENDER     DEATH
    YEAR         PER YEAR        VALUE        VALUE      BENEFIT      VALUE        VALUE      BENEFIT
- -------------  -------------  -----------  -----------  ---------  -----------  -----------  ---------
<S>            <C>            <C>          <C>          <C>        <C>          <C>          <C>
          1       10,500         9,679        8,829      39,998       9,601        8,751      39,998
          2       11,025         9,367        8,539      39,998       9,198        8,369      39,998
          3       11,576         9,065        8,257      39,998       8,789        7,982      39,998
          4       12,155         8,771        8,027      39,998       8,374        7,630      39,998
          5       12,763         8,486        7,848      39,998       7,950        7,313      39,998
          6       13,401         8,209        7,677      39,998       7,516        6,985      39,998
          7       14,071         7,940        7,515      39,998       7,069        6,644      39,998
          8       14,775         7,679        7,360      39,998       6,605        6,287      39,998
          9       15,513         7,425        7,213      39,998       6,122        5,909      39,998
         10       16,289         7,179        7,179      39,998       5,615        5,615      39,998
         11       17,103         6,975        6,975      39,998       5,104        5,104      39,998
         12       17,959         6,776        6,776      39,998       4,561        4,561      39,998
         13       18,856         6,582        6,582      39,998       3,985        3,985      39,998
         14       19,799         6,392        6,392      39,998       3,370        3,370      39,998
         15       20,789         6,207        6,207      39,998       2,713        2,713      39,998
         16       21,829         6,027        6,027      39,998       2,007        2,007      39,998
         17       22,920         5,851        5,851      39,998       1,242        1,242      39,998
         18       24,066         5,679        5,679      39,998        409          409       39,998
         19       25,270         5,512        5,512      39,998         *            *           *
         20       26,533         5,348        5,348      39,998         *            *           *
         25       33,864         4,588        4,588      39,998         *            *           *
         35       55,160         3,320        3,320      39,998         *            *           *
</TABLE>
 
*   When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 0% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-4
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                              ISSUE AGE 55 FEMALE
                          INITIAL FACE AMOUNT: $33,138
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 12% (11.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,853      10,003      33,138     10,748       9,898      33,138
          2       11,025       11,781      10,952      33,138     11,563      10,734      33,138
          3       11,576       12,791      11,984      33,138     12,452      11,645      33,138
          4       12,155       13,890      13,147      33,138     13,425      12,681      33,138
          5       12,763       15,087      14,449      33,138     14,490      13,852      33,138
          6       13,401       16,389      15,857      33,138     15,655      15,124      33,138
          7       14,071       17,805      17,380      33,138     16,931      16,506      33,138
          8       14,775       19,347      19,029      33,138     18,328      18,009      33,138
          9       15,513       21,025      20,813      33,138     19,859      19,646      33,138
         10       16,289       22,852      22,852      33,138     21,540      21,540      33,138
         11       17,103       24,965      24,965      33,138     23,486      23,486      33,138
         12       17,959       27,301      27,301      33,138     25,647      25,647      33,138
         13       18,856       29,894      29,894      35,275     28,054      28,054      33,138
         14       19,799       32,737      32,737      38,302     30,720      30,720      35,942
         15       20,789       35,851      35,851      41,588     33,640      33,640      39,023
         16       21,829       39,262      39,262      45,151     36,838      36,838      42,364
         17       22,920       43,006      43,006      48,597     40,350      40,350      45,595
         18       24,066       47,119      47,119      52,303     44,207      44,207      49,070
         19       25,270       51,642      51,642      56,290     48,448      48,448      52,808
         20       26,533       56,621      56,621      60,585     53,118      53,118      56,836
         25       33,864       89,759      89,759      94,247     84,193      84,193      88,403
         35       55,160       220,628     220,628     231,660    204,805     204,805     215,045
</TABLE>
 
(1)  Values reflect investment results using current cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 12% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-5
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                              ISSUE AGE 55 FEMALE
                          INITIAL FACE AMOUNT: $33,138
 
     ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 6% (5.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,266       9,416      33,138     10,161       9,311      33,138
          2       11,025       10,540       9,711      33,138     10,318       9,489      33,138
          3       11,576       10,822      10,014      33,138     10,471       9,663      33,138
          4       12,155       11,112      10,368      33,138     10,621       9,877      33,138
          5       12,763       11,411      10,773      33,138     10,766      10,128      33,138
          6       13,401       11,718      11,187      33,138     10,904      10,372      33,138
          7       14,071       12,035      11,610      33,138     11,031      10,606      33,138
          8       14,775       12,361      12,042      33,138     11,144      10,825      33,138
          9       15,513       12,697      12,484      33,138     11,236      11,023      33,138
         10       16,289       13,043      13,043      33,138     11,303      11,303      33,138
         11       17,103       13,466      13,466      33,138     11,390      11,390      33,138
         12       17,959       13,904      13,904      33,138     11,450      11,450      33,138
         13       18,856       14,357      14,357      33,138     11,483      11,483      33,138
         14       19,799       14,826      14,826      33,138     11,484      11,484      33,138
         15       20,789       15,311      15,311      33,138     11,449      11,449      33,138
         16       21,829       15,814      15,814      33,138     11,368      11,368      33,138
         17       22,920       16,333      16,333      33,138     11,229      11,229      33,138
         18       24,066       16,871      16,871      33,138     11,014      11,014      33,138
         19       25,270       17,427      17,427      33,138     10,702      10,702      33,138
         20       26,533       18,003      18,003      33,138     10,272      10,272      33,138
         25       33,864       21,196      21,196      33,138      5,361       5,361      33,138
         35       55,160       29,477      29,477      33,138        *           *           *
</TABLE>
 
*   When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 6% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-6
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                              ISSUE AGE 55 FEMALE
                          INITIAL FACE AMOUNT: $33,138
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 0% (-0.75% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500        9,679       8,829      33,138      9,573       8,723      33,138
          2       11,025        9,367       8,539      33,138      9,142       8,314      33,138
          3       11,576        9,065       8,257      33,138      8,707       7,900      33,138
          4       12,155        8,771       8,027      33,138      8,267       7,523      33,138
          5       12,763        8,486       7,848      33,138      7,821       7,184      33,138
          6       13,401        8,209       7,677      33,138      7,366       6,835      33,138
          7       14,071        7,940       7,515      33,138      6,898       6,473      33,138
          8       14,775        7,679       7,360      33,138      6,410       6,092      33,138
          9       15,513        7,425       7,213      33,138      5,898       5,686      33,138
         10       16,289        7,179       7,179      33,138      5,356       5,356      33,138
         11       17,103        6,975       6,975      33,138      4,801       4,801      33,138
         12       17,959        6,776       6,776      33,138      4,207       4,207      33,138
         13       18,856        6,582       6,582      33,138      3,574       3,574      33,138
         14       19,799        6,392       6,392      33,138      2,897       2,897      33,138
         15       20,789        6,207       6,207      33,138      2,170       2,170      33,138
         16       21,829        6,027       6,027      33,138      1,381       1,381      33,138
         17       22,920        5,851       5,851      33,138       513         513       33,138
         18       24,066        5,679       5,679      33,138        *           *           *
         19       25,270        5,512       5,512      33,138        *           *           *
         20       26,533        5,348       5,348      33,138        *           *           *
         25       33,864        4,588       4,588      33,138        *           *           *
         35       55,160        3,320       3,320      33,138        *           *           *
</TABLE>
 
*   When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 0% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-7
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                               ISSUE AGE 65 MALE
                          INITIAL FACE AMOUNT: $19,314
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 12% (11.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,853      10,003      19,314     10,672       9,822      19,314
          2       11,025       11,781      10,952      19,314     11,406      10,577      19,314
          3       11,576       12,791      11,984      19,314     12,212      11,404      19,314
          4       12,155       13,890      13,147      19,314     13,103      12,359      19,314
          5       12,763       15,087      14,449      19,314     14,093      13,456      19,314
          6       13,401       16,389      15,857      19,314     15,203      14,671      19,314
          7       14,071       17,811      17,386      20,126     16,453      16,028      19,314
          8       14,775       19,373      19,054      21,504     17,872      17,554      19,838
          9       15,513       21,085      20,873      22,983     19,450      19,237      21,200
         10       16,289       22,968      22,968      24,575     21,184      21,184      22,667
         11       17,103       25,144      25,144      26,402     23,190      23,190      24,349
         12       17,959       27,522      27,522      28,898     25,380      25,380      26,649
         13       18,856       30,116      30,116      31,622     27,770      27,770      29,158
         14       19,799       32,947      32,947      34,594     30,378      30,378      31,896
         15       20,789       36,033      36,033      37,834     33,221      33,221      34,882
         16       21,829       39,394      39,394      41,364     36,318      36,318      38,134
         17       22,920       43,057      43,057      45,210     39,688      39,688      41,672
         18       24,066       47,064      47,064      49,417     43,352      43,352      45,519
         19       25,270       51,446      51,446      54,018     47,329      47,329      49,695
         20       26,533       56,239      56,239      59,051     51,642      51,642      54,224
         25       33,864       87,846      87,846      92,238     79,129      79,129      83,086
         35       55,160       215,996     215,996     218,156    190,841     190,841     192,749
</TABLE>
 
(1)  Values reflect investment results using current cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 12% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-8
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                               ISSUE AGE 65 MALE
                          INITIAL FACE AMOUNT: $19,314
 
ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 6% (5.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,266       9,416      19,314     10,082       9,232      19,314
          2       11,025       10,540       9,711      19,314     10,145       9,316      19,314
          3       11,576       10,822      10,014      19,314     10,187       9,379      19,314
          4       12,155       11,112      10,368      19,314     10,205       9,461      19,314
          5       12,763       11,411      10,773      19,314     10,194       9,557      19,314
          6       13,401       11,718      11,187      19,314     10,149       9,618      19,314
          7       14,071       12,035      11,610      19,314     10,062       9,637      19,314
          8       14,775       12,361      12,042      19,314      9,922       9,604      19,314
          9       15,513       12,697      12,484      19,314      9,718       9,506      19,314
         10       16,289       13,043      13,043      19,314      9,436       9,436      19,314
         11       17,103       13,466      13,466      19,314      9,100       9,100      19,314
         12       17,959       13,904      13,904      19,314      8,655       8,655      19,314
         13       18,856       14,357      14,357      19,314      8,079       8,079      19,314
         14       19,799       14,826      14,826      19,314      7,346       7,346      19,314
         15       20,789       15,311      15,311      19,314      6,416       6,416      19,314
         16       21,829       15,814      15,814      19,314      5,235       5,235      19,314
         17       22,920       16,333      16,333      19,314      3,729       3,729      19,314
         18       24,066       16,871      16,871      19,314      1,795       1,795      19,314
         19       25,270       17,427      17,427      19,314        *           *           *
         20       26,533       18,003      18,003      19,314        *           *           *
         25       33,864       21,196      21,196      22,256        *           *           *
         35       55,160       29,647      29,647      29,944        *           *           *
</TABLE>
 
*   When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 6% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-9
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                               ISSUE AGE 65 MALE
                          INITIAL FACE AMOUNT: $19,314
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 0% (-0.75% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500        9,679       8,829      19,314      9,492       8,642      19,314
          2       11,025        9,367       8,539      19,314      8,956       8,127      19,314
          3       11,576        9,065       8,257      19,314      8,389       7,581      19,314
          4       12,155        8,771       8,027      19,314      7,785       7,041      19,314
          5       12,763        8,486       7,848      19,314      7,136       6,499      19,314
          6       13,401        8,209       7,677      19,314      6,433       5,902      19,314
          7       14,071        7,940       7,515      19,314      5,663       5,238      19,314
          8       14,775        7,679       7,360      19,314      4,810       4,491      19,314
          9       15,513        7,425       7,213      19,314      3,854       3,642      19,314
         10       16,289        7,179       7,179      19,314      2,774       2,774      19,314
         11       17,103        6,975       6,975      19,314      1,555       1,555      19,314
         12       17,959        6,776       6,776      19,314       154         154       19,314
         13       18,856        6,582       6,582      19,314        *           *           *
         14       19,799        6,392       6,392      19,314        *           *           *
         15       20,789        6,207       6,207      19,314        *           *           *
         16       21,829        6,027       6,027      19,314        *           *           *
         17       22,920        5,851       5,851      19,314        *           *           *
         18       24,066        5,679       5,679      19,314        *           *           *
         19       25,270        5,512       5,512      19,314        *           *           *
         20       26,533        5,348       5,348      19,314        *           *           *
         25       33,864        4,588       4,588      19,314        *           *           *
         35       55,160        3,320       3,320      19,314        *           *           *
</TABLE>
 
*  When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 0% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-10
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               JOINT LIFE OPTION
                            $10,000 INITIAL PREMIUM
                         ISSUE AGE 55 MALE / 55 FEMALE
                          INITIAL FACE AMOUNT: $43,779
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 12% (11.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,921      10,071      43,779     10,921      10,071      43,779
          2       11,025       11,924      11,095      43,779     11,924      11,095      43,779
          3       11,576       13,015      12,208      43,779     13,015      12,208      43,779
          4       12,155       14,203      13,460      43,779     14,203      13,460      43,779
          5       12,763       15,497      14,859      43,779     15,497      14,859      43,779
          6       13,401       16,904      16,373      43,779     16,904      16,373      43,779
          7       14,071       18,437      18,012      43,779     18,437      18,012      43,779
          8       14,775       20,105      19,786      43,779     20,105      19,786      43,779
          9       15,513       21,921      21,708      43,779     21,921      21,708      43,779
         10       16,289       23,899      23,899      43,779     23,899      23,899      43,779
         11       17,103       26,161      26,161      43,779     26,161      26,161      43,779
         12       17,959       28,641      28,641      43,779     28,641      28,641      43,779
         13       18,856       31,367      31,367      43,779     31,367      31,367      43,779
         14       19,799       34,370      34,370      43,779     34,370      34,370      43,779
         15       20,789       37,687      37,687      43,779     37,687      37,687      43,779
         16       21,829       41,344      41,344      47,546     41,344      41,344      47,546
         17       22,920       45,357      45,357      51,254     45,357      45,357      51,254
         18       24,066       49,761      49,761      55,235     49,761      49,761      55,235
         19       25,270       54,598      54,598      59,512     54,598      54,598      59,512
         20       26,533       59,916      59,916      64,110     59,916      59,916      64,110
         25       33,864       95,267      95,267      100,030    95,267      95,267      100,030
         35       55,160       234,662     234,662     246,395    232,391     232,391     244,011
</TABLE>
 
(1)  Values reflect investment results using current cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 12% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-11
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               JOINT LIFE OPTION
                            $10,000 INITIAL PREMIUM
                         ISSUE AGE 55 MALE / 55 FEMALE
                          INITIAL FACE AMOUNT: $43,779
 
     ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 6% (5.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,330       9,480      43,779     10,330       9,480      43,779
          2       11,025       10,667       9,838      43,779     10,667       9,838      43,779
          3       11,576       11,008      10,200      43,779     11,008      10,200      43,779
          4       12,155       11,353      10,609      43,779     11,353      10,609      43,779
          5       12,763       11,701      11,063      43,779     11,701      11,063      43,779
          6       13,401       12,051      11,519      43,779     12,051      11,519      43,779
          7       14,071       12,400      11,975      43,779     12,400      11,975      43,779
          8       14,775       12,745      12,426      43,779     12,745      12,426      43,779
          9       15,513       13,092      12,880      43,779     13,084      12,872      43,779
         10       16,289       13,450      13,450      43,779     13,412      13,412      43,779
         11       17,103       13,887      13,887      43,779     13,781      13,781      43,779
         12       17,959       14,340      14,340      43,779     14,134      14,134      43,779
         13       18,856       14,808      14,808      43,779     14,467      14,467      43,779
         14       19,799       15,293      15,293      43,779     14,775      14,775      43,779
         15       20,789       15,794      15,794      43,779     15,052      15,052      43,779
         16       21,829       16,313      16,313      43,779     15,288      15,288      43,779
         17       22,920       16,850      16,850      43,779     15,472      15,472      43,779
         18       24,066       17,406      17,406      43,779     15,586      15,586      43,779
         19       25,270       17,981      17,981      43,779     15,611      15,611      43,779
         20       26,533       18,576      18,576      43,779     15,526      15,526      43,779
         25       33,864       21,876      21,876      43,779     12,386      12,386      43,779
         35       55,160       30,433      30,433      43,779        *           *           *
</TABLE>
 
*   When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 6% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-12
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               SINGLE LIFE OPTION
                            $10,000 INITIAL PREMIUM
                         ISSUE AGE 55 MALE / 55 FEMALE
                          INITIAL FACE AMOUNT: $43,779
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 0% (-0.75% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500        9,740       8,890      43,779      9,740       8,890      43,779
          2       11,025        9,479       8,650      43,779      9,479       8,650      43,779
          3       11,576        9,217       8,409      43,779      9,217       8,409      43,779
          4       12,155        8,952       8,208      43,779      8,952       8,208      43,779
          5       12,763        8,682       8,045      43,779      8,682       8,045      43,779
          6       13,401        8,406       7,875      43,779      8,406       7,875      43,779
          7       14,071        8,132       7,707      43,779      8,121       7,696      43,779
          8       14,775        7,865       7,546      43,779      7,823       7,505      43,779
          9       15,513        7,606       7,393      43,779      7,509       7,296      43,779
         10       16,289        7,355       7,355      43,779      7,173       7,173      43,779
         11       17,103        7,146       7,146      43,779      6,837       6,837      43,779
         12       17,959        6,943       6,943      43,779      6,468       6,468      43,779
         13       18,856        6,745       6,745      43,779      6,059       6,059      43,779
         14       19,799        6,552       6,552      43,779      5,604       5,604      43,779
         15       20,789        6,363       6,363      43,779      5,093       5,093      43,779
         16       21,829        6,179       6,179      43,779      4,515       4,515      43,779
         17       22,920        5,999       5,999      43,779      3,854       3,854      43,779
         18       24,066        5,823       5,823      43,779      3,086       3,086      43,779
         19       25,270        5,652       5,652      43,779      2,185       2,185      43,779
         20       26,533        5,485       5,485      43,779      1,120       1,120      43,779
         25       33,864        4,709       4,709      43,779        *           *           *
         35       55,160        3,416       3,416      43,779        *           *           *
</TABLE>
 
*   When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
     administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 0% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-13
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               JOINT LIFE OPTION
                            $10,000 INITIAL PREMIUM
                         ISSUE AGE 65 MALE / 65 FEMALE
                          INITIAL FACE AMOUNT: $27,688
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 12% (11.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,916      10,066      27,688     10,916      10,066      27,688
          2       11,025       11,905      11,076      27,688     11,905      11,076      27,688
          3       11,576       12,971      12,163      27,688     12,971      12,163      27,688
          4       12,155       14,122      13,378      27,688     14,122      13,378      27,688
          5       12,763       15,367      14,730      27,688     15,367      14,730      27,688
          6       13,401       16,715      16,184      27,688     16,715      16,184      27,688
          7       14,071       18,179      17,754      27,688     18,179      17,754      27,688
          8       14,775       19,773      19,454      27,688     19,773      19,454      27,688
          9       15,513       21,515      21,303      27,688     21,515      21,303      27,688
         10       16,289       23,431      23,431      27,688     23,431      23,431      27,688
         11       17,103       25,658      25,658      27,688     25,658      25,658      27,688
         12       17,959       28,143      28,143      29,551     28,143      28,143      29,551
         13       18,856       30,868      30,868      32,412     30,868      30,868      32,412
         14       19,799       33,849      33,849      35,542     33,849      33,849      35,542
         15       20,789       37,108      37,108      38,963     37,108      37,108      38,963
         16       21,829       40,666      40,666      42,700     40,666      40,666      42,700
         17       22,920       44,548      44,548      46,776     44,548      44,548      46,776
         18       24,066       48,778      48,778      51,217     48,778      48,778      51,217
         19       25,270       53,380      53,380      56,049     53,380      53,380      56,049
         20       26,533       58,380      58,380      61,299     58,380      58,380      61,299
         25       33,864       91,198      91,198      95,758     90,356      90,356      94,874
         35       55,160       224,384     224,384     226,628    218,847     218,847     221,035
</TABLE>
 
(1)  Values reflect investment results using current cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 12% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-14
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               JOINT LIFE OPTION
                            $10,000 INITIAL PREMIUM
                         ISSUE AGE 65 MALE / 65 FEMALE
                          INITIAL FACE AMOUNT: $27,688
 
     ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 6% (5.25% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500       10,326       9,476      27,688     10,326       9,476      27,688
          2       11,025       10,647       9,819      27,688     10,647       9,819      27,688
          3       11,576       10,962      10,154      27,688     10,962      10,154      27,688
          4       12,155       11,266      10,522      27,688     11,266      10,522      27,688
          5       12,763       11,570      10,932      27,688     11,558      10,920      27,688
          6       13,401       11,882      11,351      27,688     11,832      11,300      27,688
          7       14,071       12,204      11,779      27,688     12,082      11,657      27,688
          8       14,775       12,535      12,216      27,688     12,302      11,984      27,688
          9       15,513       12,876      12,663      27,688     12,483      12,270      27,688
         10       16,289       13,227      13,227      27,688     12,612      12,612      27,688
         11       17,103       13,656      13,656      27,688     12,732      12,732      27,688
         12       17,959       14,101      14,101      27,688     12,780      12,780      27,688
         13       18,856       14,561      14,561      27,688     12,743      12,743      27,688
         14       19,799       15,037      15,037      27,688     12,605      12,605      27,688
         15       20,789       15,530      15,530      27,688     12,342      12,342      27,688
         16       21,829       16,039      16,039      27,688     11,923      11,923      27,688
         17       22,920       16,567      16,567      27,688     11,308      11,308      27,688
         18       24,066       17,113      17,113      27,688     10,438      10,438      27,688
         19       25,270       17,677      17,677      27,688      9,236       9,236      27,688
         20       26,533       18,262      18,262      27,688      7,602       7,602      27,688
         25       33,864       21,503      21,503      27,688        *           *           *
         35       55,160       29,911      29,911      30,210        *           *           *
</TABLE>
 
*  When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract average 6% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-15
<PAGE>
NORTHBROOK LIFE INSURANCE COMPANY
MODIFIED SINGLE PREMIUM VARIABLE LIFE INSURANCE
- -----------------------------------------------------------
 
                               JOINT LIFE OPTION
                            $10,000 INITIAL PREMIUM
                         ISSUE AGE 65 MALE / 65 FEMALE
                          INITIAL FACE AMOUNT: $27,688
 
    ASSUMING HYPOTHETICAL GROSS ANNUAL INVESTMENT RETURN OF 0% (-0.75% NET)
 
<TABLE>
<CAPTION>
                 PREMIUMS            CURRENT CHARGES(1)                GUARANTEED CHARGES(2)
                ACCUMULATED   ---------------------------------  ---------------------------------
   END OF          AT 5%                    CASH                               CASH
  CONTRACT       INTEREST      ACCOUNT    SURRENDER     DEATH     ACCOUNT    SURRENDER     DEATH
    YEAR         PER YEAR       VALUE       VALUE      BENEFIT     VALUE       VALUE      BENEFIT
- -------------  -------------  ---------  -----------  ---------  ---------  -----------  ---------
<S>            <C>            <C>        <C>          <C>        <C>        <C>          <C>
          1       10,500        9,735       8,885      27,688      9,735       8,885      27,688
          2       11,025        9,460       8,631      27,688      9,460       8,631      27,688
          3       11,576        9,170       8,362      27,688      9,170       8,362      27,688
          4       12,155        8,873       8,129      27,688      8,862       8,118      27,688
          5       12,763        8,585       7,947      27,688      8,531       7,894      27,688
          6       13,401        8,305       7,774      27,688      8,172       7,640      27,688
          7       14,071        8,033       7,608      27,688      7,775       7,350      27,688
          8       14,775        7,769       7,451      27,688      7,331       7,012      27,688
          9       15,513        7,513       7,301      27,688      6,826       6,613      27,688
         10       16,289        7,265       7,265      27,688      6,244       6,244      27,688
         11       17,103        7,059       7,059      27,688      5,590       5,590      27,688
         12       17,959        6,858       6,858      27,688      4,819       4,819      27,688
         13       18,856        6,661       6,661      27,688      3,906       3,906      27,688
         14       19,799        6,470       6,470      27,688      2,824       2,824      27,688
         15       20,789        6,283       6,283      27,688      1,535       1,535      27,688
         16       21,829        6,101       6,101      27,688        *           *           *
         17       22,920        5,923       5,923      27,688        *           *           *
         18       24,066        5,750       5,750      27,688        *           *           *
         19       25,270        5,580       5,580      27,688        *           *           *
         20       26,533        5,415       5,415      27,688        *           *           *
         25       33,864        4,647       4,647      27,688        *           *           *
         35       55,160        3,367       3,367      27,688        *           *           *
</TABLE>
 
*   When the account value is $0 or less, the Death Benefit is only payable if
    subsequent premiums are paid to keep the policy in force.
 
(1)  Values reflect investment results using current cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
(2)  Values reflect investment results using guaranteed cost of insurance rates,
    administrative fees, and Mortality and Expense Risk Rates.
 
The hypothetical investment results shown above and elsewhere in this prospectus
are illustrative only and should not be deemed a representation of past or
future investment results. Actual results may be more or less than those shown.
The death benefit, account value, and cash surrender value for a contract will
be different from those shown if the actual investment return applicable to the
contract averages 0% over a period of years, but also fluctuated above or below
that average for individual contract years. The death benefit, account value,
and cash surrender value for a contract will also be different from those shown,
depending on the investment allocations made to the separate account and the
rates of return of the separate account. No representation can be made that this
hypothetical rate of return can be achieved for any one year or sustained over
any period of time.
 
                                      A-16
<PAGE>

NORTHBROOK LIFE INSURANCE COMPANY
3100 SANDERS ROAD--M4A
NORTHBROOK, IL 60062


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