VARIABLE SEPARATE ACCOUNT OF ANCHOR NATIONAL LIFE INSUR CO
485BPOS, 1999-01-26
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<PAGE>   1

                                            File Nos. 33-47473
                                                      811-3859

   
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-4
                   REGISTRATION STATEMENT UNDER THE SECURITIES
                                   ACT OF 1933                   [X] 


                           Pre-Effective Amendment No.           [ ] 

                         Post-Effective Amendment No. 14         [X] 

                                     and/or

                   REGISTRATION STATEMENT UNDER THE INVESTMENT
                               COMPANY ACT OF 1940               [X] 

                                Amendment No. 31

                        (Check appropriate box or boxes)

                            VARIABLE SEPARATE ACCOUNT
                           (Exact Name of Registrant)

                     Anchor National Life Insurance Company
                               (Name of Depositor)

                               1 SunAmerica Center
                       Los Angeles, California 90067-6022
              (Address of Depositor's Principal Offices) (Zip Code)

                Depositor's Telephone Number, including Area Code
                                 (310) 772-6000

                              Susan L. Harris, Esq.
                     Anchor National Life Insurance Company
                               1 SunAmerica Center
                       Los Angeles, California 90067-6022
                     (Name and Address of Agent for Service)
    

Title and Amount
of Securities
- ----------------                                                 
Flexible Payment                
Deferred Annuity   
Contracts          
                   
                   

   
It is proposed that this filing will become effective:

        [ ]     immediately upon filing pursuant to paragraph (b) of Rule 485
        [X]     on January 29, 1999 pursuant to paragraph (b) of Rule 485
        [ ]     60 days after filing pursuant to paragraph (a) of Rule 485
        [ ]     on [   ] pursuant to paragraph (a) of Rule 485
    



<PAGE>   2
                            VARIABLE SEPARATE ACCOUNT

                              Cross Reference Sheet

                               PART A - PROSPECTUS


<TABLE>
Item Number in Form N-4                                   Caption
- -----------------------                                   -------
<S>                                                       <C>
1.      Cover Page.............................           Cover Page

2.      Definitions............................           Definitions

3.      Synopsis...............................           Profile; Fee Tables;
                                                          Portfolio Expenses;
                                                          Examples

4.      Condensed Financial Information........           Appendix A - Condensed
                                                          Financial Information

5.      General Description of Registrant,                
        Portfolio Companies......                         The Polaris Variable
                                                          Annuity; Other Information--
                                                          Anchor National

6.      Deductions.............................           Expenses

7.      General Description of
        Variable Annuity Contracts.............           The Polaris Variable
                                                          Annuity; Purchasing a
                                                          Polaris Variable Annuity
                                                          Contract; Investment
                                                          Options

8.      Annuity Period.........................           Income Options

9.      Death Benefit..........................           Death Benefit

10.     Purchases and Contract Value...........           Purchasing a Polaris
                                                          Variable Annuity Contract

11.     Redemptions............................           Access to Your Money

12.     Taxes..................................           Taxes

13.     Legal Proceedings......................           Other Information - Legal
                                                          Proceedings

14.     Table of Contents of Statement
        of Additional Information..............           Table of Contents of
                                                          Statement of Additional
                                                          Information
</TABLE>


<PAGE>   3
                  PART B - STATEMENT OF ADDITIONAL INFORMATION


        Certain information required in part B of the Registration Statement has
been included within the Prospectus forming part of this Registration Statement;
the following cross-references suffixed with a "P" are made by reference to the
captions in the Prospectus.

<TABLE>
<CAPTION>
Item Number in Form N-4                                   Caption
- -----------------------                                   -------
<S>                                                       <C>
15.     Cover Page.............................           Cover Page

16.     Table of Contents......................           Table of Contents

17.     General Information and History........           The Polaris Variable
                                                          Annuity (P); Separate
                                                          Account; General Account;
                                                          Investment Options (P);
                                                          Other Information (P)

18.     Services...............................           Other Information (P)

19.     Purchase of Securities Being Offered...           Purchasing a Polaris
                                                          Variable Contract (P)

20.     Underwriters...........................           Distribution of Contracts

21.     Calculation of Performance Data........           Performance Data

22.     Annuity Payments.......................           Income Options
                                                          (P); Income Payments;
                                                          Annuity Unit Values

23.    Financial Statements...................            Depositor: Other
                                                          Information - Financial
                                                          Statements (P)
                                                          Registrant: Financial
                                                          Statements
</TABLE>

                                     PART C

        Information required to be included in Part C is set forth under the
appropriate item, so numbered, in Part C of this Registration Statement.



<PAGE>   4
 
                                 [POLARIS LOGO]
 
THIS PROFILE IS A SUMMARY OF SOME OF THE MORE IMPORTANT POINTS THAT YOU SHOULD
KNOW AND CONSIDER BEFORE PURCHASING THE POLARIS VARIABLE ANNUITY. THE ANNUITY IS
MORE FULLY DESCRIBED IN THE PROSPECTUS. PLEASE READ THE PROSPECTUS CAREFULLY.
 
                                January 29, 1999
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                        1. THE POLARIS VARIABLE ANNUITY
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
The Polaris Variable Annuity is a contract between you and Anchor National Life
Insurance Company. It is designed to help you invest on a tax-deferred basis and
meet long-term financial goals, such as retirement funding. Tax deferral means
all your money, including the amount you would otherwise pay in current income
taxes, remains in your contract to generate more earnings. Your money could grow
faster than it would in a comparable taxable investment.
 
Polaris offers a diverse selection of money managers and investment options. You
may divide your money among any or all of our 26 variable portfolios and 5 fixed
account options. Your investment is not guaranteed. The value of your Polaris
contract can fluctuate up and down, based on the performance of the underlying
investments you select and you may experience a loss.
 
The variable portfolios offer professionally managed investment choices with
goals ranging from capital preservation to aggressive growth. Your choices for
the various investment options are found on the next page.
 
The contract also offers 5 fixed account options, for different time periods.
Each may have a different interest rate. Interest rates are guaranteed by Anchor
National.
 
Like most annuities, the contract has an accumulation phase and an income phase.
During the accumulation phase, you invest money in your contract. Your earnings
are based on the investment performance of the variable portfolios to which your
money is allocated and/or the interest rate(s) earned on the fixed account
option(s) in which you invest. You may withdraw money from your contract during
the accumulation phase. However, as with other tax-deferred investments, you
will pay taxes on earnings and untaxed contributions when you withdraw them. A
federal tax penalty may apply if you make withdrawals before age 59 1/2.
 
During the income phase, you may receive income payments from your annuity. Your
income payments may be fixed in dollar amount, vary with investment performance
or a combination of both, depending on where your money is allocated. Among
other factors, the amount of money you are able to accumulate in your contract
during the accumulation phase will affect the amount of your income payments
during the income phase.
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                               2. INCOME OPTIONS
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
You can select from one of five income options:
 
   (1) payments for your lifetime;
 
   (2) payments for your lifetime and your survivor's lifetime;
 
   (3) payments for your lifetime and your survivor's lifetime, but for not less
       than 10 years;
 
   (4) payments for your lifetime, but for not less than 10, or 20 years; and
 
   (5) payments for a specified period of 5 to 30 years.
 
You will also need to decide when your income payments begin and if you want
your income payments to fluctuate with investment performance or remain
constant. Once you begin receiving income payments, you cannot change your
income option.
 
If your contract is part of a non-qualified retirement plan (one that is
established with after-tax dollars), payments during the income phase are
considered partly a return of your original investment. The "original
investment" part of each payment is not taxable as income. For contracts which
are part of a qualified retirement plan using before-tax dollars, the entire
income payment is taxable as income.
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                        3. PURCHASING A POLARIS VARIABLE
                                ANNUITY CONTRACT
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
You can buy a contract through your financial representative, who can also help
you complete the proper forms. For non-qualified contracts, the minimum initial
purchase payment is $5,000 and subsequent amounts of $500 or more may be added
to your contract at any time during the accumulation phase. For qualified
contracts, the minimum initial purchase payment is $2,000 and subsequent amounts
of $250 or more may be added to your contract at any time during the
accumulation phase.
<PAGE>   5
 
                ----------------------------------------------------------------
                ----------------------------------------------------------------
                             4. INVESTMENT OPTIONS
                ----------------------------------------------------------------
                ----------------------------------------------------------------
 
You may allocate money to the following variable portfolios of the Anchor Series
Trust and/or the SunAmerica Series Trust:
 
ANCHOR SERIES TRUST
  MANAGED BY WELLINGTON MANAGEMENT COMPANY, LLP
      - Capital Appreciation Portfolio
      - Growth Portfolio
      - Natural Resources Portfolio
      - Government and Quality Bond Portfolio
 
SUNAMERICA SERIES TRUST
  MANAGED BY ALLIANCE CAPITAL MANAGEMENT L.P.
      - Global Equities Portfolio
      - Alliance Growth Portfolio
      - Growth-Income Portfolio
  MANAGED BY DAVIS SELECTED ADVISERS, L.P.
      - Venture Value Portfolio
      - Real Estate Portfolio
  MANAGED BY FEDERATED INVESTORS
      - Federated Value Portfolio
      - Utility Portfolio
      - Corporate Bond Portfolio
  MANAGED BY GOLDMAN SACHS ASSET MANAGEMENT/   GOLDMAN SACHS ASSET MANAGEMENT
INTERNATIONAL
      - Asset Allocation Portfolio
      - Global Bond Portfolio
  MANAGED BY MASSACHUSETTS FINANCIAL SERVICES COMPANY
      - MFS Growth and Income Portfolio
      - MFS Total Return Portfolio
  MANAGED BY MORGAN STANLEY ASSET MANAGEMENT
      - International Diversified Equities Portfolio
      - Worldwide High Income Portfolio
  MANAGED BY PUTNAM INVESTMENT MANAGEMENT, INC.
      - Putnam Growth Portfolio
      - International Growth and Income Portfolio
      - Emerging Markets Portfolio
  MANAGED BY SUNAMERICA ASSET MANAGEMENT CORP.
      - Aggressive Growth Portfolio
      - "Dogs" of Wall Street Portfolio
      - SunAmerica Balanced Portfolio
      - High-Yield Bond Portfolio
      - Cash Management Portfolio
 
You may also allocate money to the 1 year fixed account option or the 3, 5, 7
and 10-year market value adjustment ("MVA") fixed account options.
 
The interest rates applicable for these fixed account options may differ from
time to time, however, we will never credit less than a 3% annual effective
rate. Once established, the rate will not change during the selected period.
Your contract value will be adjusted up or down for withdrawals or transfers
from the 3, 5, 7 and 10-year fixed account options prior to the end of the
guarantee period.
                ----------------------------------------------------------------
                ----------------------------------------------------------------
                                  5. EXPENSES
                ----------------------------------------------------------------
                ----------------------------------------------------------------
 
Each year, we deduct a $35 contract maintenance fee ($30 in North Dakota) from
your contract. We also deduct insurance charges which equal 1.52% annually of
the average daily value of your contract allocated to the variable portfolios.
 
As with other professionally managed investments, there are also investment
charges imposed on contracts with money allocated to the variable portfolios. We
estimate these fees to range from .58 to 1.90.
 
If you take money out of your contract, you may be assessed a withdrawal charge
which is a percentage of the money you withdraw. The percentage declines over
the time the money is in the contract.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------
      Year           1        2        3        4        5        6        7        8
- -----------------------------------------------------------------------------------------
<S>               <C>      <C>      <C>      <C>      <C>      <C>      <C>      <C>
 WITHDRAWAL
 CHARGE              7%       6%       5%       4%       3%       2%       1%       0%
- -----------------------------------------------------------------------------------------
</TABLE>
 
Each year, you are allowed to make 15 transfers without charge. After your first
15 free transfers, a $25 transfer fee ($10 in Pennsylvania and Texas) applies to
each subsequent transfer.
 
In a limited number of states, you may also be assessed a state premium tax of
up to 3.5% depending upon the state.
 
The following chart is designed to help you understand the charges in your
contract. The column "Total Annual Charges" shows the total of the 1.52%
insurance charges, the $35 contract maintenance fee and the investment charges
for each variable portfolio. We converted the contract maintenance fee to a
percentage using an assumed contract size of $40,000. The actual impact of this
charge on your contract may differ from this percentage.
 
The next two columns show two examples of the charges you would pay under the
contract. The examples assume that you invested $1,000 in a contract which earns
5% annually and that you withdraw your money: (1) at the end of year 1, and (2)
at the end of year 10. The premium tax is assumed to be 0% in both examples.
<PAGE>   6
 
<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------
                                                                                               EXAMPLES:
                                       TOTAL ANNUAL         TOTAL ANNUAL                     TOTAL EXPENSES   TOTAL EXPENSES
                                        INSURANCE            INVESTMENT       TOTAL ANNUAL     AT END OF        AT END OF
   ANCHOR SERIES TRUST PORTFOLIO         CHARGES              CHARGES           CHARGES          1 YEAR          10 YEARS
- ----------------------------------------------------------------------------------------------------------------------------
<S>                                    <C>                  <C>               <C>            <C>              <C>
Capital Appreciation                      1.61%                 .68%             2.29%            $ 93             $262
Growth                                    1.61%                 .75%             2.36%            $ 94             $269
Natural Resources                         1.61%                 .88%             2.49%            $ 95             $282
Government and Quality Bond               1.61%                 .67%             2.28%            $ 93             $261
- ----------------------------------------------------------------------------------------------------------------------------
SUNAMERICA SERIES TRUST PORTFOLIO
Emerging Markets*                         1.61%                1.90%             3.51%            $105             $378
International Diversified Equities        1.61%                1.26%             2.87%            $ 99             $319
Global Equities                           1.61%                 .88%             2.49%            $ 95             $282
International Growth and Income*          1.61%                1.46%             3.07%            $101             $338
Aggressive Growth*                        1.61%                 .83%             2.44%            $ 95             $277
Real Estate*                              1.61%                 .95%             2.56%            $ 96             $289
Putnam Growth                             1.61%                 .86%             2.47%            $ 95             $280
MFS Growth and Income(1)                  1.61%                 .73%             2.34%            $ 94             $267
Alliance Growth                           1.61%                 .64%             2.25%            $ 93             $258
"Dogs" of Wall Street*                    1.61%                 .85%             2.46%            $ 95             $279
Venture Value                             1.61%                 .75%             2.36%            $ 94             $269
Federated Value*                          1.61%                 .83%             2.44%            $ 95             $277
Growth-Income                             1.61%                 .60%             2.21%            $ 92             $254
Utility*                                  1.61%                1.01%             2.62%            $ 96             $295
Asset Allocation                          1.61%                 .64%             2.25%            $ 93             $258
MFS Total Return(2)                       1.61%                 .77%             2.38%            $ 94             $271
SunAmerica Balanced*                      1.61%                 .78%             2.39%            $ 94             $272
Worldwide High Income                     1.61%                1.08%             2.69%            $ 97             $302
High-Yield Bond                           1.61%                 .69%             2.30%            $ 93             $263
Corporate Bond                            1.61%                 .77%             2.38%            $ 94             $271
Global Bond                               1.61%                 .85%             2.46%            $ 95             $279
Cash Management                           1.61%                 .58%             2.19%            $ 92             $252
- ----------------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
* For these Portfolios, the adviser, SunAmerica Asset Management Corp., has
  voluntarily agreed to waive fees or reimburse expenses, if necessary, to keep
  operating expenses at or below an established maximum amount. All waivers or
  reimbursements may be terminated at any time. For more detailed information,
  see the Fee Tables and Examples in the prospectus.
 1 Formerly named Growth/Phoenix and managed by Phoenix Investment Counsel, Inc.
 2 Formerly named Balanced/Phoenix and managed by Phoenix Investment Counsel,
Inc.
 
                ----------------------------------------------------------------
                ----------------------------------------------------------------
                                    6. TAXES
                ----------------------------------------------------------------
                ----------------------------------------------------------------
 
Unlike taxable investments where earnings are taxed in the year they are earned,
taxes on amounts earned in a non-qualified contract are deferred until they are
withdrawn. In a qualified contract, all amounts are taxable when they are
withdrawn.
 
When you begin taking distributions or withdrawals from your contract, earnings
are considered to be taken out first and will be taxed at your ordinary income
rate. You may be subject to a 10% federal tax penalty for distributions or
withdrawals before age 59 1/2.
 
                ----------------------------------------------------------------
                ----------------------------------------------------------------
                            7. ACCESS TO YOUR MONEY
                ----------------------------------------------------------------
                ----------------------------------------------------------------
 
During the first year, you may withdraw free of a withdrawal charge an amount
that is equal to the penalty-free earnings in your contract as of the date you
make the withdrawal or, if you participate in the systematic withdrawal program,
you may withdraw 10% of your total invested amount less any withdrawals made
during the year. The penalty-free earnings amount is calculated by taking the
value of your contract on the day you make the withdrawal and subtracting your
total invested amount. After the first year, your maximum free withdrawal amount
is the greater of: (1) the penalty-free earnings or (2) 10% of your total
invested amount that has been invested for at least one year, less any
withdrawals made during the year. Withdrawals in excess of these limits will be
assessed a withdrawal charge.
 
If you withdraw your entire contract value, you will not receive the benefit of
any free withdrawal amount. After your money has been in the contract for seven
full years, there are no withdrawal charges on that portion of the money that
you have invested for at least seven full years.
 
                ----------------------------------------------------------------
                ----------------------------------------------------------------
                                 8. PERFORMANCE
                ----------------------------------------------------------------
                ----------------------------------------------------------------
 
When you invest in the Polaris Variable Annuity, your money is actually invested
in the underlying portfolios of the Anchor Series Trust and/or the SunAmerica
Series Trust. The value of your annuity will fluctuate depending upon the
investment performance of the portfolio(s) you choose.
 
The following chart shows total returns for each portfolio for the time periods
shown. These numbers reflect the insurance charges, the contract maintenance fee
and the investment charges. Withdrawal charges are not reflected in the chart.
Past performance is no guarantee of future results.
<PAGE>   7
<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------------------------------------
                                                                       CALENDAR YEAR
 ANCHOR SERIES TRUST PORTFOLIO           1998                   1997                   1996                   1995
- --------------------------------------------------------------------------------------------------------------------------
<S>                              <C>                    <C>                    <C>                    <C>
  Capital Appreciation                   20.30%                 23.50%                23.17%                 32.41%
  Growth                                 26.98%                 28.36%                23.06%                 24.30%
  Natural Resources                     (18.80)%               (10.10)%               12.20%                 15.45%
  Gov't and Quality Bond                  7.42%                  7.82%                 1.35%                 17.49%
- --------------------------------------------------------------------------------------------------------------------------
SUNAMERICA SERIES TRUST
PORTFOLIO
  Emerging Markets                      (25.56)%               (17.37)%*                  --                     --
  Int'l Diversified Equities             16.62%                  4.71%                 7.59%                  8.52%
  Global Equities                        20.90%                 13.25%                12.37%                 17.33%
  Int'l Growth and Income                 9.05%                  5.36%*                   --                     --
  Aggressive Growth                      15.58%                 10.55%                 4.33%                     --
  Real Estate                           (16.72)%                17.16%*                   --                     --
  Putnam Growth                          32.63%                 30.41%                18.46%                 22.83%
  MFS Growth and Income1                 27.26%                 21.28%                14.12%                 30.12%
  Alliance Growth                        49.85%                 29.41%                27.10%                 41.58%
  "Dogs" of Wall Street**                (1.81)%                   --                     --                     --
  Venture Value                          11.98%                 32.21%                22.86%                 35.36%
  Federated Value                        16.07%                 29.37%                 7.32%                     --
  Growth-Income                          28.76%                 31.85%                22.11%                 31.95%
  Utility                                12.24%                 23.78%                 8.26%                     --
  Asset Allocation                        1.69%                 19.93%                17.05%                 24.33%
  MFS Total Return2                      17.65%                 15.09%                 8.18%                 25.51%
  SunAmerica Balanced                    22.70%                 22.52%                 9.39%                     --
  Worldwide High Income                 (18.44)%                13.72%                23.38%                 19.04%
  High-Yield Bond                        (4.50)%                12.66%                12.71%                 12.44%
  Corporate Bond                          4.31%                  9.14%                 2.86%                 15.82%
  Global Bond                             9.05%                  8.31%                 7.58%                 15.83%
  Cash Management                         3.51%                  3.58%                 3.31%                  3.85%
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
* Inception to 12/31/97.
**Inception to 12/31/98.
Inception date for each portfolio varies.
1 Formerly named Growth/Phoenix and managed by Phoenix Investment Counsel, Inc.
2 Formerly named Balanced/Phoenix and managed by Phoenix Investment Counsel, Inc.
 
<CAPTION>
- -------------------------------  --------------------
                                    CALENDAR YEAR
 ANCHOR SERIES TRUST PORTFOLIO           1994
- -------------------------------  --------------------
<S>                              <C>
  Capital Appreciation              (5.60)%
  Growth                            (6.27)%
  Natural Resources                 (5.93)%
  Gov't and Quality Bond            (4.44)%
- --------------------------------------------------------------------------
SUNAMERICA SERIES TRUST
PORTFOLIO
  Emerging Markets                    --
  Int'l Diversified Equities        (3.68)%
  Global Equities                   (1.96)%
  Int'l Growth and Income             --
  Aggressive Growth                   --
  Real Estate                         --
  Putnam Growth                     (3.25)%
  MFS Growth and Income1            (9.52)%
  Alliance Growth                   (3.76)%
  "Dogs" of Wall Street**             --
  Venture Value                     (1.23)%
  Federated Value                     --
  Growth-Income                     (4.20)%
  Utility                             --
  Asset Allocation                  (1.80)%
  MFS Total Return2                 (0.58)%
  SunAmerica Balanced                 --
  Worldwide High Income             (2.39)%
  High-Yield Bond                   (6.98)%
  Corporate Bond                    (4.73)%
  Global Bond                       (6.27)%
  Cash Management                   2.12 %
- -----------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------------------------------------
* Inception to 12/31/97.
**Inception to 12/31/98.
Inception date for each portfol
1 Formerly named Growth/Phoenix
2 Formerly named Balanced/Phoen
</TABLE>
 
                ----------------------------------------------------------------
                ----------------------------------------------------------------
                                9. DEATH BENEFIT
                ----------------------------------------------------------------
                ----------------------------------------------------------------
 
If you should die during the accumulation phase, your beneficiary will receive a
death benefit.
 
The death benefit is the greater of:
 
(1) the value of your contract at the time we receive satisfactory proof of
    death; or
 
(2) total purchase payments less withdrawals (and any fees or charges applicable
    to such withdrawals), compounded at a 4% annual growth rate (3% growth rate
    if 70 or older at the time of contract issue); or
 
(3) the value of your contract on the seventh contract anniversary, plus any
    purchase payments and less any withdrawals (and any fees or charges
    applicable to such withdrawals) since the seventh anniversary, all
    compounded at a 4% annual growth rate until the date of death (3% if 70 or
    older at the time of contract issue).
 
                ----------------------------------------------------------------
                ----------------------------------------------------------------
                             10. OTHER INFORMATION
                ----------------------------------------------------------------
                ----------------------------------------------------------------
 
FREE LOOK: You may cancel your contract within ten days (or longer if required
by your state) by mailing it to our Annuity Service Center. Your contract will
be treated as void on the date we receive it and we will pay you an amount equal
to the value of your contract (unless otherwise required by state law). Its
value may be more or less than the money you initially invested.
 
ASSET ALLOCATION REBALANCING: If selected by you, this program seeks to keep
your investment in line with your goals. We will maintain your specified
allocation mix in the variable portfolios and the 1-year fixed account option by
readjusting your money on a calendar quarter, semiannual or annual basis.
 
SYSTEMATIC WITHDRAWAL PROGRAM: If selected by you, this program allows you to
receive either monthly, quarterly, semiannual or annual checks during the
accumulation phase. Systematic withdrawals may also be electronically
transferred to your bank account. Of course, withdrawals may be taxable and a
10% federal tax penalty may apply if you are under age 59 1/2.
 
PRINCIPAL ADVANTAGE PROGRAM: If selected by you, this program allows you to
obtain growth potential without any market risk to your principal. We will
guarantee that the portion of your money allocated to the 1, 3, 5, 7 or 10-year
fixed account option will grow to equal your principal investment when it is
allocated in accordance with the program.
<PAGE>   8
 
DOLLAR COST AVERAGING: If selected by you, this program allows you to invest
gradually in the variable portfolios from any of the variable portfolios and the
1-year fixed account option.
 
AUTOMATIC PAYMENT PLAN: You can add to your contract directly from your bank
account with as little as $20 per month.
 
CONFIRMATIONS AND QUARTERLY STATEMENTS: You will receive a confirmation of each
transaction within your contract. On a quarterly basis, you will receive a
complete statement of your transactions over the past quarter and a summary of
your account values.
 
                ----------------------------------------------------------------
                ----------------------------------------------------------------
                                 11. INQUIRIES
                ----------------------------------------------------------------
                ----------------------------------------------------------------
 
If you have questions about your contract or need to make changes, call your
financial representative or contact us at:
 
      Anchor National Life Insurance Company
      Annuity Service Center
      P.O. Box 54299
      Los Angeles, California 90054-0299
      Telephone Number: (800) 445-SUN2
 
If money accompanies your correspondence, you should direct it to:
 
      Anchor National Life Insurance Company
      P.O. Box 100330
      Pasadena, California 91189-0001
<PAGE>   9
 
                                 [POLARIS LOGO]
 
                                   PROSPECTUS
                                JANUARY 29, 1999
 
<TABLE>
<S>                                   <C>     <C>
Please read this prospectus carefully         FLEXIBLE PAYMENT DEFERRED ANNUITY CONTRACTS
before investing and keep it for              issued by
future reference. It contains                 ANCHOR NATIONAL LIFE INSURANCE COMPANY
important information about the               in connection with
Polaris Variable Annuity.                     VARIABLE SEPARATE ACCOUNT
                                              The annuity has 31 investment choices -5 fixed account
To learn more about the annuity               options and 26 Variable Portfolios listed below. The 5 fixed
offered by this prospectus, you can           account options include specified periods of 1, 3, 5, 7 and
obtain a copy of the Statement of             10 years. The 26 Variable Portfolios are part of the Anchor
Additional Information ("SAI") dated          Series Trust or the SunAmerica Series Trust.
January 29, 1999. The SAI has been
filed with the Securities and                 ANCHOR SERIES TRUST:
Exchange Commission ("SEC") and is            MANAGED BY WELLINGTON MANAGEMENT COMPANY, LLP
incorporated by reference into this           - Capital Appreciation Portfolio
prospectus. The Table of Contents of          - Growth Portfolio
the SAI appears on page 29 of this            - Natural Resources Portfolio
prospectus. For a free copy of the            - Government and Quality Bond Portfolio
SAI, call us at (800) 445-SUN2 or
write to us at our Annuity Service            SUNAMERICA SERIES TRUST:
Center, P.O. Box 54299, Los Angeles,          MANAGED BY ALLIANCE CAPITAL MANAGEMENT L.P.
California 90054-0299.                        - Global Equities Portfolio
                                              - Alliance Growth Portfolio
In addition, the SEC maintains a              - Growth-Income Portfolio
website (http://www.sec.gov) that             MANAGED BY DAVIS SELECTED ADVISERS, L.P.
contains the SAI, materials                   - Venture Value Portfolio
incorporated by reference and other           - Real Estate Portfolio
information filed electronically with         MANAGED BY FEDERATED INVESTORS
the SEC by Anchor National.                   - Federated Value Portfolio
                                              - Utility Portfolio
ANNUITIES INVOLVE RISKS, INCLUDING            - Corporate Bond Portfolio
POSSIBLE LOSS OF PRINCIPAL, AND ARE           MANAGED BY GOLDMAN SACHS ASSET MANAGEMENT/
NOT A DEPOSIT OR OBLIGATION OF, OR            GOLDMAN SACHS ASSET MANAGEMENT INTERNATIONAL
GUARANTEED OR ENDORSED BY, ANY BANK.          - Asset Allocation Portfolio
THEY ARE NOT FEDERALLY INSURED BY THE         - Global Bond Portfolio
FEDERAL DEPOSIT INSURANCE                     MANAGED BY MASSACHUSETTS FINANCIAL SERVICES COMPANY
CORPORATION, THE FEDERAL RESERVE              - MFS Growth and Income Portfolio
BOARD OR ANY OTHER AGENCY.                    - MFS Total Return Portfolio
                                              MANAGED BY MORGAN STANLEY ASSET MANAGEMENT
                                              - International Diversified Equities Portfolio
                                              - Worldwide High Income Portfolio
                                              MANAGED BY PUTNAM INVESTMENT MANAGEMENT, INC.
                                              - Putnam Growth Portfolio
                                              - International Growth and Income Portfolio
                                              - Emerging Markets Portfolio
                                              MANAGED BY SUNAMERICA ASSET MANAGEMENT CORP.
                                              - Aggressive Growth Portfolio
                                              - "Dogs" of Wall Street Portfolio
                                              - SunAmerica Balanced Portfolio
                                              - High-Yield Bond Portfolio
                                              - Cash Management Portfolio
</TABLE>
 
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
  EXCHANGE COMMISSION, NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR
     ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
                              A CRIMINAL OFFENSE.
<PAGE>   10
 
   
<TABLE>
 <S>   <C>                                                     <C>
 ------------------------------------------------------------------
 ------------------------------------------------------------------
                         TABLE OF CONTENTS
 ------------------------------------------------------------------
 ------------------------------------------------------------------
 GLOSSARY....................................................     2
 FEE TABLES..................................................     3
       Owner Transaction Expenses............................     3
       Annual Separate Account Expenses......................     3
       Portfolio Expenses....................................     3
 EXAMPLES....................................................     4
 THE POLARIS VARIABLE ANNUITY................................     5
 PURCHASING A POLARIS VARIABLE ANNUITY.......................     5
       Allocation of Purchase Payments.......................     6
       Accumulation Units....................................     6
       Free Look.............................................     6
 INVESTMENT OPTIONS..........................................     6
       Variable Portfolios...................................     6
       Anchor Series Trust...................................     6
       SunAmerica Series Trust...............................     7
       Fixed Account Options.................................     7
       Market Value Adjustment ("MVA").......................     7
       Transfers During the Accumulation Phase...............     8
       Dollar Cost Averaging.................................     8
       Asset Allocation Rebalancing..........................     9
       Principal Advantage Program...........................     9
       Voting Rights.........................................     9
       Substitution..........................................    10
 ACCESS TO YOUR MONEY........................................    10
       Systematic Withdrawal Program.........................    10
       Nursing Home Waiver...................................    10
       Minimum Contract Value................................    11
 DEATH BENEFIT...............................................    11
 EXPENSES....................................................    11
       Insurance Charges.....................................    11
       Withdrawal Charges....................................    11
       Investment Charges....................................    12
       Contract Maintenance Fee..............................    12
       Transfer Fee..........................................    12
       Premium Tax...........................................    12
       Income Taxes..........................................    12
       Reduction or Elimination of Charges and Expenses, and
       Additional Amounts Credited...........................    12
 INCOME OPTIONS..............................................    12
       Annuity Date..........................................    12
       Income Options........................................    13
       Fixed or Variable Income Payments.....................    13
       Income Payments.......................................    13
       Transfers During the Income Phase.....................    14
       Deferment of Payments.................................    14
 TAXES.......................................................    14
       Annuity Contracts in General..........................    14
       Tax Treatment of Distributions -
       Non-Qualified Contracts...............................    14
       Tax Treatment of Distributions -
       Qualified Contracts...................................    14
       Minimum Distributions.................................    14
       Diversification.......................................    15
 PERFORMANCE.................................................    15
 OTHER INFORMATION...........................................    15
       Anchor National.......................................    15
       The Separate Account..................................    15
       The General Account...................................    16
       Distribution of the Contract..........................    16
       Administration........................................    16
       Year 2000.............................................    16
       Legal Proceedings.....................................    17
       Ownership.............................................    17
       Custodian.............................................    17
       Additional Information................................    17
       Selected Consolidated Financial Data..................    18
       Management Discussion and Analysis....................    19
       Results of Operations.................................    19
       Financial Condition and Liquidity.....................    22
       Rated Bonds by Rating Classification..................    23
       Properties............................................    26
       Directors and Officers................................    27
       Executive Compensation................................    28
       Security Ownership of Owners and Management...........    28
       Regulation............................................    28
       Independent Accountants...............................    29
 TABLE OF CONTENTS OF STATEMENT OF ADDITIONAL INFORMATION....
                                                                 29
 FINANCIAL STATEMENTS........................................    29
 APPENDIX A -- CONDENSED FINANCIAL INFORMATION...............   A-1
 APPENDIX B -- MARKET VALUE ADJUSTMENT ("MVA")...............   B-1
 APPENDIX C -- PREMIUM TAXES.................................   C-1
 
 ------------------------------------------------------------------
 ------------------------------------------------------------------
                              GLOSSARY
 ------------------------------------------------------------------
 ------------------------------------------------------------------
 We have capitalized some of the technical terms used in this
 prospectus. To help you understand these terms, we have defined
 them in this glossary.
 ACCUMULATION PHASE - The period during which you invest money in
 your contract.
 ACCUMULATION UNITS - A measurement we use to calculate the value
 of the variable portion of your contract during the Accumulation
 Phase.
 ANNUITANT(S) - The person(s) on whose life (lives) we base income
 payments.
 ANNUITY DATE - The date on which income payments are to begin, as
 selected by you.
 ANNUITY UNITS - A measurement we use to calculate the amount of
 income payments you receive from the variable portion of your
 contract during the Income Phase.
 BENEFICIARY - The person designated to receive any benefits under
 the contract if you or the Annuitant dies.
 COMPANY - Anchor National Life Insurance Company, We, Us, the
 insurer which issues this contract.
 INCOME PHASE - The period during which we make income payments to
 you.
 IRS - The Internal Revenue Service.
 NON-QUALIFIED (CONTRACT) - A contract purchased with after-tax
 dollars. In general, these contracts are not under any pension
 plan, specially sponsored program or individual retirement account
 ("IRA").
 PURCHASE PAYMENTS - The money you give us to buy the contract, as
 well as any additional money you give us to invest in the contract
 after you own it.
 QUALIFIED (CONTRACT) - A contract purchased with pretax dollars.
 These contracts are generally purchased under a pension plan,
 specially sponsored program or IRA.
 TRUSTS - Refers to the Anchor Series Trust and the SunAmerica
 Series Trust collectively.
 VARIABLE PORTFOLIO(S) - The variable investment options available
 under the contract. Each Variable Portfolio has its own investment
 objective and is invested in the underlying investments of the
 Anchor Series Trust or the SunAmerica Series Trust.
</TABLE>
    
 
                                        2
<PAGE>   11
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                                   FEE TABLES
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
OWNER TRANSACTION EXPENSES
 
WITHDRAWAL CHARGE (AS A PERCENTAGE OF EACH PURCHASE PAYMENT)
 
<TABLE>
<S>                          <C>   <C>                          <C>
Year 1......................   7%  Year 5......................   3%
Year 2......................   6%  Year 6......................   2%
Year 3......................   5%  Year 7......................   1%
Year 4......................   4%  Year 8+.....................   0%
TRANSFER FEE....................   No charge for first 15 transfers
                                   each contract year; thereafter,
                                   fee is $25 ($10 in Pennsylvania
                                   and Texas) per transfer
CONTRACT MAINTENANCE FEE*.......   $35 ($30 in North Dakota)
  *waived if contract value is $50,000 or more
</TABLE>
 
  ANNUAL SEPARATE ACCOUNT EXPENSES
  (AS A PERCENTAGE OF AVERAGE ACCOUNT VALUE)
 
<TABLE>
<S>                                                  <C>
  Mortality and Expense Risk Charge................  1.37%
  Distribution Expense Charge......................  0.15%
                                                     -----
      TOTAL SEPARATE ACCOUNT EXPENSES                1.52%
                                                     =====
</TABLE>
 
   
                               PORTFOLIO EXPENSES
    
 
   
                              ANCHOR SERIES TRUST
    
   
(AS A PERCENTAGE OF AVERAGE NET ASSETS FOR THE TRUST'S TWELVE-MONTH PERIOD ENDED
                               NOVEMBER 30, 1998)
    
 
   
<TABLE>
<CAPTION>
                                                              MANAGEMENT         OTHER        TOTAL ANNUAL
                         PORTFOLIO                                FEE          EXPENSES         EXPENSES
<S>                                                           <C>              <C>            <C>
- -----------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------
Capital Appreciation                                              .64%            .04%             .68%
- -----------------------------------------------------------------------------------------------------------
Growth                                                            .70%            .05%             .75%
- -----------------------------------------------------------------------------------------------------------
Natural Resources                                                 .75%            .13%             .88%
- -----------------------------------------------------------------------------------------------------------
Government and Quality Bond                                       .61%            .06%             .67%
- -----------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------
</TABLE>
    
 
   
                            SUNAMERICA SERIES TRUST
    
   
(AS A PERCENTAGE OF AVERAGE NET ASSETS AFTER REIMBURSEMENT OR WAIVER OF EXPENSES
              FOR THE TRUST'S FISCAL YEAR ENDED NOVEMBER 30, 1998)
    
 
   
<TABLE>
<CAPTION>
                                                              MANAGEMENT         OTHER        TOTAL ANNUAL
                         PORTFOLIO                                FEE          EXPENSES         EXPENSES
<S>                                                           <C>              <C>            <C>
- -----------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------
Emerging Markets***                                              1.25%            .65%            1.90%
- -----------------------------------------------------------------------------------------------------------
International Diversified Equities                               1.00%            .26%            1.26%
- -----------------------------------------------------------------------------------------------------------
Global Equities                                                   .74%            .14%             .88%
- -----------------------------------------------------------------------------------------------------------
International Growth and Income****                              1.00%            .46%            1.46%
- -----------------------------------------------------------------------------------------------------------
Aggressive Growth                                                 .74%            .09%             .83%
- -----------------------------------------------------------------------------------------------------------
Real Estate****                                                   .80%            .15%             .95%
- -----------------------------------------------------------------------------------------------------------
Putnam Growth                                                     .81%            .05%             .86%
- -----------------------------------------------------------------------------------------------------------
MFS Growth and Income**+                                          .70%            .03%             .73%
- -----------------------------------------------------------------------------------------------------------
Alliance Growth+                                                  .61%            .03%             .64%
- -----------------------------------------------------------------------------------------------------------
"Dogs" of Wall Street***                                          .60%            .25%             .85%*
- -----------------------------------------------------------------------------------------------------------
Venture Value                                                     .72%            .03%             .75%
- -----------------------------------------------------------------------------------------------------------
Federated Value                                                   .75%            .08%             .83%
- -----------------------------------------------------------------------------------------------------------
Growth-Income                                                     .56%            .04%             .60%
- -----------------------------------------------------------------------------------------------------------
Utility****                                                       .75%            .26%            1.01%
- -----------------------------------------------------------------------------------------------------------
Asset Allocation                                                  .59%            .05%             .64%
- -----------------------------------------------------------------------------------------------------------
MFS Total Return**+                                               .67%            .10%             .77%
- -----------------------------------------------------------------------------------------------------------
SunAmerica Balanced                                               .68%            .10%             .78%
- -----------------------------------------------------------------------------------------------------------
Worldwide High Income                                            1.00%            .08%            1.08%
- -----------------------------------------------------------------------------------------------------------
High-Yield Bond                                                   .63%            .06%             .69%
- -----------------------------------------------------------------------------------------------------------
Corporate Bond                                                    .65%            .12%             .77%
- -----------------------------------------------------------------------------------------------------------
Global Bond                                                       .70%            .15%             .85%
- -----------------------------------------------------------------------------------------------------------
Cash Management                                                   .53%            .05%             .58%
- -----------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------
</TABLE>
    
 
   
   * Annualized.
    
 
   
  ** As of January 4, 1998, the Growth/Phoenix Portfolio was renamed the MFS
     Growth and Income Portfolio, and the Balanced/Phoenix Portfolio was renamed
     the MFS Total Return Portfolio, each managed by Massachusetts Financial
     Services Company.
    
 
   
 *** Absent fee waivers or reimbursement of expenses by the adviser, you would
     have incurred the following expenses during the last fiscal year: Emerging
     Markets (2.01%) and "Dogs" of Wall Street (.92%).
    
 
   
**** Absent recoupment of expenses by the adviser, you would have incurred the
     following expenses during the last fiscal year: International Growth and
     Income (1.40%); Real Estate (.93%); and Utility (.92%).
    
 
   
   + The expenses noted here are restated to reflect an estimate of fees for
     each portfolio for the current fiscal year.
    
   
     THE ABOVE PORTFOLIO EXPENSES WERE PROVIDED BY THE TRUSTS. WE HAVE NOT
            INDEPENDENTLY VERIFIED THE ACCURACY OF THE INFORMATION.
    
 
                                        3
<PAGE>   12
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                                    EXAMPLES
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
You will pay the following expenses on a $1,000 investment in each Variable
Portfolio, assuming a 5% annual return on assets and:
        (a) surrendered at the end of the stated time period;
        (b) if the contract is not surrendered*.
 
<TABLE>
<CAPTION>
                         PORTFOLIO                             1 YEAR    3 YEARS    5 YEARS    10 YEARS
<S>                                                           <C>        <C>        <C>        <C>
- -------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------
Capital Appreciation                                          (a) $ 93   (a) $121   (a) $152   (a) $262
                                                              (b) $ 23   (b) $ 71   (b) $122   (b) $262
- -------------------------------------------------------------------------------------------------------
Growth                                                        (a) $ 94   (a) $124   (a) $156   (a) $269
                                                              (b) $ 24   (b) $ 74   (b) $126   (b) $269
- -------------------------------------------------------------------------------------------------------
Natural Resources                                             (a) $ 95   (a) $127   (a) $162   (a) $282
                                                              (b) $ 25   (b) $ 77   (b) $132   (b) $282
- -------------------------------------------------------------------------------------------------------
Government and Quality Bond                                   (a) $ 93   (a) $121   (a) $152   (a) $261
                                                              (b) $ 23   (b) $ 71   (b) $122   (b) $261
- -------------------------------------------------------------------------------------------------------
Emerging Markets                                              (a) $105   (a) $158   (a) $212   (a) $378
                                                              (b) $ 35   (b) $108   (b) $182   (b) $378
- -------------------------------------------------------------------------------------------------------
International Diversified Equities                            (a) $ 99   (a) $139   (a) $181   (a) $319
                                                              (b) $ 29   (b) $ 89   (b) $151   (b) $319
- -------------------------------------------------------------------------------------------------------
Global Equities                                               (a) $ 95   (a) $127   (a) $162   (a) $282
                                                              (b) $ 25   (b) $ 77   (b) $132   (b) $282
- -------------------------------------------------------------------------------------------------------
International Growth and Income                               (a) $101   (a) $145   (a) $191   (a) $338
                                                              (b) $ 31   (b) $ 95   (b) $161   (b) $338
- -------------------------------------------------------------------------------------------------------
Aggressive Growth                                             (a) $ 95   (a) $126   (a) $160   (a) $277
                                                              (b) $ 25   (b) $ 76   (b) $130   (b) $277
- -------------------------------------------------------------------------------------------------------
Real Estate                                                   (a) $ 96   (a) $130   (a) $166   (a) $289
                                                              (b) $ 26   (b) $ 80   (b) $136   (b) $289
- -------------------------------------------------------------------------------------------------------
Putnam Growth                                                 (a) $ 95   (a) $127   (a) $161   (a) $280
                                                              (b) $ 25   (b) $ 77   (b) $131   (b) $280
- -------------------------------------------------------------------------------------------------------
MFS Growth and Income                                         (a) $ 94   (a) $123   (a) $155   (a) $267
                                                              (b) $ 24   (b) $ 73   (b) $125   (b) $267
- -------------------------------------------------------------------------------------------------------
Alliance Growth                                               (a) $ 93   (a) $120   (a) $150   (a) $258
                                                              (b) $ 23   (b) $ 70   (b) $120   (b) $258
- -------------------------------------------------------------------------------------------------------
"Dogs" of Wall Street                                         (a) $ 95   (a) $127   (a) $161   (a) $279
                                                              (b) $ 25   (b) $ 77   (b) $131   (b) $279
- -------------------------------------------------------------------------------------------------------
Venture Value                                                 (a) $ 94   (a) $124   (a) $156   (a) $269
                                                              (b) $ 24   (b) $ 74   (b) $126   (b) $269
- -------------------------------------------------------------------------------------------------------
Federated Value                                               (a) $ 95   (a) $126   (a) $160   (a) $277
                                                              (b) $ 25   (b) $ 76   (b) $130   (b) $277
- -------------------------------------------------------------------------------------------------------
Growth-Income                                                 (a) $ 92   (a) $119   (a) $148   (a) $254
                                                              (b) $ 22   (b) $ 69   (b) $118   (b) $254
- -------------------------------------------------------------------------------------------------------
Utility                                                       (a) $ 96   (a) $131   (a) $169   (a) $295
                                                              (b) $ 26   (b) $ 81   (b) $139   (b) $295
- -------------------------------------------------------------------------------------------------------
Asset Allocation                                              (a) $ 93   (a) $120   (a) $150   (a) $258
                                                              (b) $ 23   (b) $ 70   (b) $120   (b) $258
- -------------------------------------------------------------------------------------------------------
MFS Total Return                                              (a) $ 94   (a) $124   (a) $157   (a) $271
                                                              (b) $ 24   (b) $ 74   (b) $127   (b) $271
- -------------------------------------------------------------------------------------------------------
SunAmerica Balanced                                           (a) $ 94   (a) $124   (a) $157   (a) $272
                                                              (b) $ 24   (b) $ 74   (b) $127   (b) $272
- -------------------------------------------------------------------------------------------------------
Worldwide High Income                                         (a) $ 97   (a) $133   (a) $172   (a) $302
                                                              (b) $ 27   (b) $ 83   (b) $142   (b) $302
- -------------------------------------------------------------------------------------------------------
High-Yield Bond                                               (a) $ 93   (a) $122   (a) $153   (a) $263
                                                              (b) $ 23   (b) $ 72   (b) $123   (b) $263
- -------------------------------------------------------------------------------------------------------
Corporate Bond                                                (a) $ 94   (a) $124   (a) $157   (a) $271
                                                              (b) $ 24   (b) $ 74   (b) $127   (b) $271
- -------------------------------------------------------------------------------------------------------
Global Bond                                                   (a) $ 95   (a) $127   (a) $161   (a) $279
                                                              (b) $ 25   (b) $ 77   (b) $131   (b) $279
- -------------------------------------------------------------------------------------------------------
Cash Management                                               (a) $ 92   (a) $118   (a) $147   (a) $252
                                                              (b) $ 22   (b) $ 68   (b) $117   (b) $252
- -------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------
</TABLE>
 
       * Anchor National does not impose any fees or charges when you begin the
       Income Phase of your contract.
 
                                        4
<PAGE>   13
 
EXPLANATION OF FEE TABLES AND EXAMPLES
 
1.  The purpose of the Fee Tables is to show you the various expenses you would
    incur directly and indirectly by investing in the contract.
 
2.  For certain Variable Portfolios, the adviser, SunAmerica Asset Management
    Corp., has voluntarily agreed to waive fees or reimburse certain expenses,
    if necessary, to keep annual operating expenses at or below the lesser of
    the maximum allowed by any applicable state expense limitations or the
    following percentages of each Variable Portfolio's average net assets:
    SunAmerica Balanced (1.00%); Aggressive Growth (.90%); Federated Value
    (1.03%); Utility (1.05%); Emerging Markets (1.90%); International Growth and
    Income (1.60%); and Real Estate (1.25%). The adviser also may voluntarily
    waive or reimburse additional amounts to increase a Variable Portfolio's
    investment return. All waivers and/or reimbursements may be terminated at
    any time. Furthermore, the adviser may recoup any waivers or reimbursements
    within two years after such waivers or reimbursements are granted, provided
    that the Variable Portfolio is able to make such payment and remain in
    compliance with the foregoing expense limitations.
 
3.  The Examples assume that no transfer fees were imposed. Although premium
    taxes may apply in certain states, they are not reflected in the Examples.
 
4.  THESE EXAMPLES SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR FUTURE
    EXPENSES. ACTUAL EXPENSES MAY BE GREATER OR LESS THAN THOSE SHOWN.
 
THE HISTORICAL ACCUMULATION UNIT VALUES ARE CONTAINED IN APPENDIX A -- CONDENSED
                             FINANCIAL INFORMATION.
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                          THE POLARIS VARIABLE ANNUITY
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
An annuity is a contract between you and an insurance company. You are the owner
of the contract. The contract provides three main benefits:
 
     - Tax Deferral: This means that you do not pay taxes on your earnings from
       the annuity until you withdraw them.
 
     - Death Benefit: If you die during the Accumulation Phase, the insurance
       company pays a death benefit to your Beneficiary.
 
     - Guaranteed Income: If elected, you receive a stream of income for your
       lifetime, or another available period you select.
 
This annuity was developed to help you contribute to your retirement savings.
This annuity works in two stages, the Accumulation Phase and the Income Phase.
Your contract is in the Accumulation Phase during the period when you make
payments into the contract. The Income Phase begins when you request us to start
making income payments to you out of the money accumulated in your contract.
The contract is called a "variable" annuity because it allows you to invest in
variable portfolios which, like mutual funds, have different investment
objectives and performance which varies. You can gain or lose money if you
invest in these Variable Portfolios. The amount of money you accumulate in your
contract depends on the performance of the Variable Portfolios in which you
invest. This contract currently offers 26 Variable Portfolios.
 
The contract also offers several fixed account options for varying time periods.
Fixed account options earn interest at a rate set and guaranteed by Anchor
National. If you allocate money to the fixed account options, the amount of
money that accumulates in the contract depends on the total interest credited to
the particular fixed account option(s) in which you invest.
 
For more information on investment options available under this contract SEE
INVESTMENT OPTIONS ON PAGE 6.
 
Anchor National Life Insurance Company (Anchor National, The Company, Us, We)
issues the Polaris Variable Annuity. When you purchase a Polaris Variable
Annuity, a contract exists between you and Anchor National. The Company is a
stock life insurance company organized under the laws of the state of Arizona.
Its principal place of business is 1 SunAmerica Center, Los Angeles, California
90067. The Company conducts life insurance and annuity business in the District
of Columbia and all states except New York. Anchor National is an indirect,
wholly owned subsidiary of American International Group, Inc. ("AIG"), a
Delaware corporation.
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                     PURCHASING A POLARIS VARIABLE ANNUITY
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
A Purchase Payment is the money you give us to buy a contract. Any additional
money you give us to invest in the contract after purchase is a subsequent
Purchase Payment.
 
This chart shows the minimum initial and subsequent Purchase Payments permitted
under your contract. These amounts depend upon whether a contract is Qualified
or Non-qualified for tax purposes. FOR FURTHER EXPLANATION, SEE TAXES ON PAGE
14.
 
<TABLE>
<S>                   <C>                <C>
- -----------------------------------------------------------
                                              Minimum
                       Minimum Initial       Subsequent
                       Purchase Payment   Purchase Payment
- -----------------------------------------------------------
      Qualified             $2,000              $250
- -----------------------------------------------------------
    Non-Qualified           $5,000              $500
- -----------------------------------------------------------
</TABLE>
 
Prior Company approval is required to accept Purchase Payments greater than
$1,000,000. Also, the optional
 
                                        5
<PAGE>   14
 
automatic payment plan allows you to make subsequent Purchase Payments of as
little as $20.00.
 
We may refuse any Purchase Payment. In general, we will not issue a Qualified
contract to anyone who is age 70 1/2 or older, unless it is shown that the
minimum distribution required by the IRS is being made. In addition we may not
issue a contract to anyone over age 90.
 
ALLOCATION OF PURCHASE PAYMENTS
 
We invest your Purchase Payments in the fixed and variable investment options
according to your instructions. If we receive a Purchase Payment without
allocation instructions, we will invest the money according to your last
allocation instructions. SEE INVESTMENT OPTIONS ON PAGE 6.
 
In order to issue your contract, we must receive your completed application,
Purchase Payment allocation instructions and any other required paperwork at our
principal place of business. We allocate your initial purchase payment within
two days of receiving it. If we do not have complete information necessary to
issue your contract, we will contact you. If we do not have the information
necessary to issue your contract within 5 business days we will:
 
     - Send your money back to you, or;
 
     - Ask your permission to keep your money until we get the information
       necessary to issue the contract.
 
ACCUMULATION UNITS
 
When you allocate a Purchase Payment to the Variable Portfolios, we credit your
contract with Accumulation Units of the separate account. The value of an
Accumulation Unit goes up and down based on the performance of the Variable
Portfolios.
 
We calculate the value of an Accumulation Unit each day that the New York Stock
Exchange ("NYSE") is open as follows:
 
     1. We determine the total value of money invested in a particular Variable
        Portfolio;
 
     2. We subtract from that amount all applicable contract charges; and
 
     3. We divide this amount by the number of outstanding Accumulation Units.
 
We determine the number of Accumulation Units credited to your contract by
dividing the Purchase Payment by the Accumulation Unit value for the specific
Variable Portfolio.
 
     EXAMPLE:
 
     We receive a $25,000 Purchase Payment from you on Wednesday. You allocate
     the money to the Global Bond Portfolio. We determine that the value of an
     Accumulation Unit for the Global Bond Portfolio is $11.10 when the NYSE
     closes on Wednesday. We then divide $25,000 by $11.10 and credit your
     contract on Wednesday night with 2252.52 Accumulation Units for the Global
     Bond Portfolio.
 
Performance of the Variable Portfolios and expenses under your contract affect
Accumulation Unit values. These factors cause the value of your contract to go
up and down.
 
FREE LOOK
 
You may cancel your contract within ten days after receiving it (or longer if
required by state law). We call this a "free look." To cancel, you must mail the
contract along with your free look request to our Annuity Service Center at P.O.
Box 54299, Los Angeles, California 90054-0299. We will refund to you the value
of your contract on the day we receive your request. The amount refunded to you
may be more or less than the amount you originally invested.
 
Certain states require us to return your Purchase Payments upon a free look
request. Additionally, all contracts issued as an IRA require the full return of
Purchase Payments upon a free look. With respect to those contracts, we reserve
the right to put your money in the Cash Management Portfolio or the 1-year fixed
investment option during the free look period. If you cancel your contract
during the free look period, we return your Purchase Payment or the value of
your contract, whichever is larger. At the end of the free look period, we
allocate your money according to your instructions.
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                               INVESTMENT OPTIONS
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
VARIABLE PORTFOLIOS
 
The contract currently offers 26 Variable Portfolios. These Variable Portfolios
invest in shares of the Anchor Series Trust and the SunAmerica Series Trust (the
"Trusts"). Additional portfolios may be available in the future. The Variable
Portfolios operate similarly to a mutual fund but are only available through the
purchase of certain insurance contracts.
 
SunAmerica Asset Management Corp., an indirect wholly owned subsidiary of AIG,
is the investment adviser to the Trusts. The Trusts serve as the underlying
investment vehicles for other variable annuity contracts issued by Anchor
National, and other affiliated/unaffiliated insurance companies. Neither Anchor
National nor the Trusts believe that offering shares of the Trusts in this
manner disadvantages you. The adviser monitors the Trusts for potential
conflicts.
 
The Variable Portfolios, along with their respective subadvisers are listed
below:
 
     ANCHOR SERIES TRUST
 
Wellington Management Company, LLP serves as subadviser to the Anchor Series
Trust Portfolios. Anchor Series Trust
 
                                        6
<PAGE>   15
 
has Variable Portfolios in addition to those listed below which are not
available for investment under the contract. The 4 available Variable Portfolios
are:
 
  MANAGED BY WELLINGTON MANAGEMENT COMPANY, LLP
 
     - Capital Appreciation Portfolio
     - Growth Portfolio
     - Natural Resources Portfolio
     - Government and Quality Bond Portfolio
 
     SUNAMERICA SERIES TRUST
 
Various subadvisers provide investment advice for the SunAmerica Series Trust
Portfolios. SunAmerica Series Trust has Variable Portfolios in addition to those
listed below which are not available for investment under the contract. The 22
Variable Portfolios and the subadvisers are:
 
  MANAGED BY ALLIANCE CAPITAL MANAGEMENT L.P.
 
    - Global Equities Portfolio
    - Alliance Growth Portfolio
    - Growth Income Portfolio
 
  MANAGED BY DAVIS SELECTED ADVISERS, L.P.
 
    - Venture Value Portfolio
    - Real Estate Portfolio
 
  MANAGED BY FEDERATED INVESTORS
 
    - Federated Value Portfolio
    - Utility Portfolio
    - Corporate Bond Portfolio
 
  MANAGED BY GOLDMAN SACHS ASSET MANAGEMENT/GOLDMAN
  SACHS ASSET MANAGEMENT INTERNATIONAL
 
    - Asset Allocation Portfolio
    - Global Bond Portfolio
 
  MANAGED BY MASSACHUSETTS FINANCIAL SERVICES COMPANY
 
    - MFS Growth and Income Portfolio
    - MFS Total Return Portfolio
 
  MANAGED BY MORGAN STANLEY ASSET MANAGEMENT
 
    - International Diversified Equities Portfolio
    - Worldwide High Income Portfolio
 
  MANAGED BY PUTNAM INVESTMENT MANAGEMENT
 
    - Putnam Growth Portfolio
    - International Growth and Income Portfolio
    - Emerging Markets Portfolio
 
  MANAGED BY SUNAMERICA ASSET MANAGEMENT, INC.
 
    - Aggressive Growth Portfolio
    - "Dogs" of Wall Street Portfolio
    - SunAmerica Balanced Portfolio
    - High-Yield Bond Portfolio
    - Cash Management Portfolio
 
YOU SHOULD READ THE PROSPECTUSES FOR THE TRUSTS CAREFULLY. THESE PROSPECTUSES
CONTAIN DETAILED INFORMATION ABOUT THE PORTFOLIOS, INCLUDING EACH VARIABLE
PORTFOLIO'S INVESTMENT OBJECTIVE AND RISK FACTORS.
 
FIXED ACCOUNT OPTIONS
 
The contract also offers fixed account options for periods of 1, 3, 5, 7 and 10
years. We call these time periods guarantee periods.
 
All of these fixed account options pay interest at rates set and guaranteed by
Anchor National. Interest rates may differ from time to time and are set at our
sole discretion. We never credit less than a 3% annual effective rate to any of
the fixed account options. The interest rate offered for new Purchase Payments
may differ from that offered for subsequent Purchase Payments and money already
in the fixed account options. In addition, different guarantee periods offer
different interest rates. Once established, the rates for specified payments do
not change during the specified period.
 
When a guarantee period ends, you may leave your money in the same guarantee
period. You may also reallocate your money to another fixed account option or to
the Variable Portfolios. If you want to reallocate your money you must contact
us within 30 days after the end of the current guarantee period and instruct us
how to reallocate the money. We do not contact you. If we do not hear from you,
we will keep your money in the same guarantee period where it will earn the
renewal interest rate applicable at that time.
 
The 1-year fixed account option is not registered under the Securities Act of
1933 and is not subject to other provisions of the Investment Company Act of
1940.
 
MARKET VALUE ADJUSTMENT ("MVA")
 
NOTE: THE FOLLOWING DISCUSSION APPLIES TO THE 3, 5, 7 AND 10-YEAR FIXED ACCOUNT
OPTIONS, ONLY.
 
If you take money out of the multi-year fixed account options before the end of
the guarantee period, we make an adjustment to your contract. We refer to the
adjustment as a market value adjustment (the "MVA"). The MVA reflects any
difference in the interest rate environment between the time you place your
money in the fixed account option and the time when you withdraw that money.
This adjustment can increase or decrease your contract value. You have 30 days
after the end of each guarantee period to reallocate your funds without
incurring any MVA.
 
We calculate the MVA by doing a comparison between current rates and the rate
being credited to you in the fixed account option. For the current rate we use a
rate being offered by us for a guarantee period that is equal to the time
remaining in the guarantee period from which you seek withdrawal. If we are not
currently offering a guarantee period for that period of time, we determine an
applicable rate by using a formula to arrive at a number between the interest
rates currently offered for the two closest periods available.
 
Generally, if interest rates drop between the time you put your money into the
fixed account options and the time you take it out, we credit a positive
adjustment to your contract.
 
                                        7
<PAGE>   16
 
Conversely, if interest rates increase during the same period, we post a
negative adjustment to your contract.
 
Where the MVA is negative, we first deduct the adjustment from any money
remaining in the fixed account option. If there is not enough money in the fixed
account option to meet the negative deduction, we deduct the remainder from your
withdrawal. Where the MVA is positive, we add the adjustment to your withdrawal
amount.
 
Anchor National does not assess a MVA against withdrawals under the following
circumstances:
 
     - When you switch to the Income Phase;
 
     - To pay a death benefit;
 
     - If made within 30 days after the end of a guarantee period; and
 
     - If made to pay contract fees and charges.
 
APPENDIX B shows how we calculate the MVA.
 
TRANSFERS DURING THE ACCUMULATION PHASE
 
During the Accumulation Phase you may transfer funds between the Variable
Portfolios and/or the fixed account options. Funds already in your contract
cannot be transferred into the DCA fixed accounts. You must transfer at least
$100. If less than $100 will remain in any Variable Portfolio after a transfer,
that amount must be transferred as well.
 
You may request transfers of your account value between the Variable Portfolios
and/or the fixed account options in writing or by telephone. We currently allow
15 free transfers per contract per year. We charge $25 ($10 in Pennsylvania and
Texas) for each additional transfer in any contract year. Transfers resulting
from your participation in the DCA program count against your 15 free transfers
per contract year. However, transfers resulting from your participation in the
automatic asset rebalancing program do not count against your 15 free transfers.
 
We accept transfer requests by telephone unless you tell us not to on your
contract application. Additionally, in the future you may be able to execute
transfers or other financial transactions over the internet. When receiving
instructions over the telephone, we follow appropriate procedures to provide
reasonable assurance that the transactions executed are genuine. Thus, we are
not responsible for any claim, loss or expense from any error resulting from
instructions received over the telephone.
 
Upon implementation of internet account transactions we will have appropriate
procedures in place to provide reasonable assurance that the transactions
executed are genuine. Thus, we would not be responsible for any claim, loss or
expense from any error resulting from instructions received over the internet.
If we fail to follow our procedures, we may be liable for any losses due to
unauthorized or fraudulent instructions.
We may limit the number of transfers in any contract year or refuse any transfer
request for you or others invested in the contract if we believe that:
 
     - Excessive trading or a specific transfer request or group transfer
       requests may have a detrimental effect on unit values or the share prices
       of the underlying Variable Portfolios; or
 
     - The underlying Variable Portfolios inform us that they need to restrict
       the purchase or redemption of the shares because of excessive trading or
       because a specific transfer or group of transfers is deemed to have a
       detrimental effect on share prices of affected underlying Variable
       Portfolios.
 
Where permitted by law, we may accept your authorization for a third party to
make transfers for you subject to our rules. We reserve the right to suspend or
cancel such acceptance at any time and will notify you accordingly.
Additionally, we may restrict the investment options available for transfers
during any period in which such third party acts for you. We notify such third
party beforehand regarding any restrictions. However, we will not enforce these
restrictions if we are satisfied that:
 
     - such third party has been appointed by a court of competent jurisdiction
       to act on your behalf; or
 
     - such third party is a trustee/fiduciary, for you or appointed by you, to
       act on your behalf for all your financial affairs.
 
We may provide administrative or other support services to independent third
parties you authorize to make transfers on your behalf. We do not currently
charge you extra for providing these support services. This includes, but is not
limited to, transfers between investment options in accordance with market
timing strategies. Such independent third parties may or may not be appointed
with us for the sale of annuities. However, WE DO NOT ENGAGE ANY THIRD PARTIES
TO OFFER INVESTMENT ALLOCATION SERVICES OF ANY TYPE. WE TAKE NO RESPONSIBILITY
FOR THE INVESTMENT ALLOCATION AND TRANSFERS TRANSACTED ON YOUR BEHALF BY SUCH
THIRD PARTIES OR FOR ANY INVESTMENT ALLOCATION RECOMMENDATIONS MADE BY SUCH
PARTIES.
 
For information regarding transfers during the Income Phase, SEE INCOME OPTIONS
ON PAGE 12.
 
We reserve the right to modify, suspend, waive or terminate these transfer
provisions at any time.
 
DOLLAR COST AVERAGING
 
The Dollar Cost Averaging ("DCA") program allows you to invest gradually in the
Variable Portfolios. Under the program you systematically transfer a set dollar
amount or percentage of portfolio value from one Variable Portfolio or the
1-year fixed account option (source accounts) to any
 
                                        8
<PAGE>   17
 
other Variable Portfolio. Transfers may be monthly or quarterly and do count
against your 15 free transfers per contract year. You may change the frequency
at any time by notifying us in writing. The minimum transfer amount under the
DCA program is $100, regardless of the source account.
 
The DCA program is designed to lessen the impact of market fluctuations on your
investment. However, we cannot ensure that you will make a profit. When you
elect the DCA program, you are continuously investing in securities regardless
of fluctuating price levels. You should consider your tolerance for investing
through periods of fluctuating price levels.
 
We reserve the right to modify, suspend or terminate this program at any time.
 
     EXAMPLE:
 
     Assume that you want to gradually move $750 each quarter from the Cash
     Management Portfolio to the Aggressive Growth Portfolio over six quarters.
     You set up dollar cost averaging and purchase Accumulation Units at the
     following values:
 
<TABLE>
<CAPTION>
- -------------------------------------------
                ACCUMULATION      UNITS
   QUARTER          UNIT        PURCHASED
- -------------------------------------------
<S>            <C>            <C>
      1            $ 7.50          100
      2            $ 5.00          150
      3            $10.00          75
      4            $ 7.50          100
      5            $ 5.00          150
      6            $ 7.50          100
- -------------------------------------------
</TABLE>
 
     You paid an average price of only $6.67 per Accumulation Unit over six
     quarters, while the average market price actually was $7.08. By investing
     an equal amount of money each month, you automatically buy more
     Accumulation Units when the market price is low and fewer Accumulation
     Units when the market price is high. This example is for illustrative
     purposes only.
 
ASSET ALLOCATION REBALANCING
 
Earnings in your contract may cause the percentage of your investment in each
investment option to differ from your original allocations. The automatic asset
rebalancing program addresses this situation. At your election, we periodically
rebalance your investments to return your allocations to their original
percentages. Asset rebalancing typically involves shifting a portion of your
money out of an investment option with a higher return into an investment option
with a lower return.
 
At your request, rebalancing occurs on a quarterly, semiannual or annual basis.
Transfers made as a result of rebalancing do not count against your 15 free
transfers for the contract year.
 
We reserve the right to modify, suspend or terminate this program at any time.
 
     EXAMPLE:
 
     Assume that you want your initial Purchase Payment split between two
     Variable Portfolios. You want 50% in the Corporate Bond Portfolio and 50%
     in the Growth Portfolio. Over the next calendar quarter, the bond market
     does very well while the stock market performs poorly. At the end of the
     calendar quarter, the Corporate Bond Portfolio now represents 60% of your
     holdings because it has increased in value and the Growth Portfolio
     represents 40% of your holdings. If you had chosen quarterly rebalancing,
     on the last day of that quarter, we would sell some of your units in the
     Corporate Bond Portfolio to bring its holdings back to 50% and use the
     money to buy more units in the Growth Portfolio to increase those holdings
     to 50%.
 
PRINCIPAL ADVANTAGE PROGRAM
 
The Principal Advantage Program allows you to invest in one or more Variable
Portfolios without putting your principal at direct risk. The program
accomplishes this by allocating your investment strategically between the fixed
account options and Variable Portfolios. You decide how much you want to invest
and approximately when you want a return of principal. We calculate how much of
your Purchase Payment to allocate to the particular fixed account option to
ensure that it grows to an amount equal to your total principal invested under
this program. We invest the rest of your principal in the Variable Portfolio(s)
of your choice.
 
We reserve the right to modify, suspend or terminate this program at any time.
 
     EXAMPLE:
 
     Assume that you want to allocate a portion of your initial Purchase Payment
     of $100,000 to the fixed account option. You want the amount allocated to
     the fixed account option to grow to $100,000 in 7 years. If the 7-year
     fixed account option is offering a 5% interest rate, we will allocate
     $71,069 to the 7-year fixed account option to ensure that this amount will
     grow to $100,000 at the end of the 7-year period. The remaining $28,931 may
     be allocated among the Variable Portfolios, as determined by you, to
     provide opportunity for greater growth.
 
VOTING RIGHTS
 
Anchor National is the legal owner of the Trusts' shares. However, when a
Variable Portfolio solicits proxies in conjunction with a vote of shareholders,
we must obtain your instructions on how to vote those shares. We vote all of the
shares we own in proportion to your instructions. This includes any shares we
own on our own behalf. Should we determine that we are no longer required to
comply with these rules, we will vote the shares in our own right.
 
                                        9
<PAGE>   18
 
SUBSTITUTION
 
If Variable Portfolios become unavailable for investment, we may be required to
substitute shares of another Variable Portfolio. We will seek prior approval of
the SEC and give you notice before substituting shares.
 
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- ----------------------------------------------------------------
                              ACCESS TO YOUR MONEY
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
You can access money in your contract in two ways:
 
     - by making a partial or total withdrawal, and/or;
 
     - by receiving income payments during the Income Phase. SEE INCOME OPTIONS
       ON PAGE 12.
 
Generally, we deduct a withdrawal charge applicable to any total or partial
withdrawal and a MVA against withdrawals from the 3, 5, 7 or 10 year fixed
account options. If you withdraw your entire contract value, we also deduct
premium taxes and a contract maintenance fee. SEE EXPENSES ON PAGE 11.
 
Your contract provides for a free withdrawal amount. A free withdrawal amount is
the portion of your account that we allow you to take out each year without
being charged a withdrawal charge.
 
Purchase Payments that are no longer subject to a withdrawal charge and not
previously withdrawn, plus earnings, may be withdrawn free of a withdrawal
charge at any time.
 
After the first year, you may withdraw the greater of the following amounts free
of a withdrawal charge (1) earnings in your contract as of the date you make the
withdrawal; or (2) 10% of the Purchase Payments you invested for at least one
year and not yet withdrawn, less any previous earnings withdrawals or Systematic
Withdrawals that year.
 
Only your first withdrawal of the year is free. If you do not take the entire
free amount available to you at that first withdrawal, you will forfeit the
opportunity to withdraw that money free of the withdrawal charge for that year.
 
The portion of a free withdrawal which exceeds the sum of: (1) earnings in the
contract and (2) Purchase Payments which are both no longer subject to the
withdrawal charge schedule and not yet withdrawn is assumed to be a withdrawal
against future earnings. Although amounts withdrawn free of a withdrawal charge
under the 10% provision may reduce principal for purposes of calculating amounts
available for future withdrawals of earnings, they do not reduce the amount you
invested for purposes of calculating the withdrawal charge if you withdraw your
entire contract value.
 
However, upon a future full surrender of your contract, we will recoup any
surrender charges which would have been applicable if your free withdrawal(s)
had not been free.
 
We calculate charges due on a total withdrawal on the day after we receive your
request and your contract. We return to you your contract value less any
applicable fees and charges.
 
Under most circumstances, the partial withdrawals minimum is $1,000. We require
that the value left in any investment option be at least $100, after the
withdrawal. You must send a written withdrawal request. Unless you provide us
with different instructions, partial withdrawals will be made pro rata from each
Variable Portfolio and the fixed in account option in which your contract is
invested.
 
Under certain Qualified plans, access to the money in your contract may be
restricted. Additionally, withdrawals made prior to age 59 1/2 may result in a
10% IRS penalty tax. SEE TAXES ON PAGE 14.
 
We may be required to suspend or postpone the payment of a withdrawal for any
period of time when: (1) the NYSE is closed (other than a customary weekend and
holiday closings); (2) trading with the NYSE is restricted; (3) an emergency
exists such that disposal of or determination of the value of shares of the
Variable Portfolios is not reasonably practicable; (4) the SEC, by order, so
permits for the protection of contract owners.
 
Additionally, we reserve the right to defer payments for a withdrawal from a
fixed account in option. Such deferrals are limited to no longer than six
months.
 
SYSTEMATIC WITHDRAWAL PROGRAM
 
During the Accumulation Phase, you may elect to receive periodic income payments
under the systematic withdrawal program. Under the program, you may choose to
take monthly, quarterly, semi-annual or annual payments from your contract.
Electronic transfer of these funds to your bank account is also available. The
minimum amount of each withdrawal is $250. There must be at least $500 remaining
in your contract at all times. Withdrawals may be taxable and a 10% IRS penalty
tax may apply if you are under age 59 1/2. There is no additional charge for
participating in this program, although a withdrawal charge and/or MVA may
apply.
 
The program is not available to everyone. Please check with our Annuity Service
Center, which can provide the necessary enrollment forms. We reserve the right
to modify, suspend or terminate this program at any time.
 
NURSING HOME WAIVER
 
If you are confined to a nursing home for 60 days or longer, we may waive the
withdrawal charge and/or market value adjustment on certain withdrawals prior to
the Annuity Date (not available in Texas). The waiver applies only to
withdrawals made while you are in a nursing home or within 90 days after you
leave the nursing home. Your contract prohibits use of this waiver during the
first 90 days after you purchase your contract. In addition, the confinement
period for which you seek the waiver must begin after you purchase your
contract.
 
                                       10
<PAGE>   19
 
In order to use this waiver, you must submit with your withdrawal request, the
following documents: (1) a doctor's note recommending admittance to a nursing
home; (2) an admittance form which shows the type of facility you entered; and
(3) a bill from the nursing home which shows that you met the 60 day confinement
requirement.
 
MINIMUM CONTRACT VALUE
 
Where permitted by state law, we may terminate your contract if both of the
following occur: (1) your contract is less than $500 as a result of withdrawals;
and (2) you have not made any Purchase Payments during the past three years. We
will provide you with sixty days written notice. At the end of the notice
period, we will distribute the contract's remaining value to you.
 
- ----------------------------------------------------------------
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                                  DEATH BENEFIT
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
If you die during the Accumulation Phase of your contract, we pay a death
benefit to your Beneficiary.
 
The death benefit is the greater of:
 
     1. the value of your contract at the time we receive satisfactory proof of
        death; or
 
     2. total Purchase Payments less withdrawals (and any fees or charges
        applicable to such withdrawals), compounded at a 4% annual growth rate
        until the date of death (3% growth rate if 70 or older at the time of
        contract issue); or
 
     3. the value of your contract on the seventh contract anniversary, plus any
        Purchase Payments and less any withdrawals (and any fees or charges
        applicable to such withdrawals), since the seventh contract anniversary,
        all compounded at a 4% annual growth rate until the date of death (3%
        growth rate if age 70 or older at the time of contract issue).
 
We do not pay the death benefit if you die after you switch to the Income Phase.
However, if you die during the Income Phase, your Beneficiary receives any
remaining guaranteed income payments in accordance with the income option you
selected. SEE INCOME OPTIONS ON PAGE 13.
 
You name your Beneficiary. You may change the Beneficiary at any time, unless
you previously made an irrevocable Beneficiary designation.
 
We pay the death benefit when we receive satisfactory proof of death. We
consider the following satisfactory proof of death:
 
     1. a certified copy of the death certificate; or
 
     2. a certified copy of a decree of a court of competent jurisdiction as to
        the finding of death; or
     3. a written statement by a medical doctor who attended the deceased at the
        time of death; or
 
     4. any other proof satisfactory to us.
 
We may require additional proof before we pay the death benefit.
 
The death benefit payment must begin immediately upon receipt of all necessary
documents. In any event, the death benefit must be paid within 5 years of the
date of death unless the Beneficiary elects to have it payable in the form of an
income option. If the Beneficiary elects an income option, it must be paid over
the Beneficiary's lifetime or for a period not extending beyond the
Beneficiary's life expectancy. Payments must begin within one year of your
death.
 
If the Beneficiary is the spouse of a deceased owner, he or she can elect to
continue the Contract at the then current value. If the Beneficiary/spouse
continues the contract, we do not pay a death benefit to him or her.
 
If a Beneficiary does not elect a specific form of pay out within 60 days of our
receipt of proof of death, we pay a lump sum death benefit to the Beneficiary.
 
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- ----------------------------------------------------------------
                                    EXPENSES
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
There are charges and expenses associated with your contract. These charges and
expenses reduce your investment return. We will not increase the contract
maintenance fee or the insurance and withdrawal charges under your contract.
However, the investment charges under your contract may increase or decrease.
Some states may require that we charge less than the amounts described below.
 
INSURANCE CHARGES
 
The amount of this charge is 1.52% annually, of the value of your contract
invested in the Variable Portfolios. We deduct the charge daily.
 
The insurance charge compensates us for the mortality and expense risks and the
costs of contract distribution assumed by Anchor National.
 
If these charges do not cover all of our expenses, we will pay the difference.
Likewise, if these charges exceed our expenses, we will keep the difference.
 
WITHDRAWAL CHARGES
 
The contract provides a free withdrawal amount every year. SEE ACCESS TO YOUR
MONEY ON PAGE 10. If you take money out in excess of the free withdrawal amount,
and upon a full surrender, you may incur a withdrawal charge.
 
We apply a withdrawal charge against each Purchase Payment you put into the
contract. After a Purchase Payment has been in the contract for 7 complete
years, no withdrawal
 
                                       11
<PAGE>   20
 
charge applies. The withdrawal charge equals a percentage of the Purchase
Payment you take out of the contract. The withdrawal charge percentage declines
each year a Purchase Payment is in the contract, as follows:
 
<TABLE>
<CAPTION>
- -------------------------------------------------------------------
           Year               1    2    3    4    5    6    7    8
- -------------------------------------------------------------------
<C>                          <S>  <C>  <C>  <C>  <C>  <C>  <C>  <C>
     WITHDRAWAL CHARGE       7%   6%   5%   4%   3%   2%   1%   0%
- -------------------------------------------------------------------
</TABLE>
 
When calculating the withdrawal charge, we treat withdrawals as coming first
from the Purchase Payments that have been in your contract the longest. However,
for tax purposes, your withdrawals are considered earnings first, then Purchase
Payments.
 
Whenever possible, we deduct the withdrawal charge from the money remaining in
your contract. If you withdraw all of your contract value, we deduct any
applicable withdrawal charges from the amount withdrawn.
 
We will not assess a withdrawal charge for money withdrawn to pay a death
benefit or to pay contract fees or charges. Additionally, we will not assess a
withdrawal charge when you switch to the Income Phase.
 
Withdrawals made prior to age 59 1/2 may result in tax penalties. SEE TAXES ON
PAGE 14.
 
INVESTMENT CHARGES
 
Charges are deducted from your Variable Portfolios for the advisory and other
expenses of the Variable Portfolios. THE FEE TABLES LOCATED ON PAGE 3 illustrate
these charges and expenses. For more detailed information on these investment
charges, refer to the prospectuses for the Trusts, enclosed or attached.
 
CONTRACT MAINTENANCE FEE
 
During the Accumulation Phase, we subtract a contract maintenance fee from your
account once per year. This charge compensates us for the cost of contract
administration. We deduct the $35 contract maintenance fee ($30 in North Dakota
and Utah) from your account value on your contract anniversary. If you withdraw
your entire contract value, we deduct the fee from that withdrawal.
 
If your contract value is $50,000 or more on your contract anniversary date, we
will waive the charge. This waiver is subject to change without notice.
 
TRANSFER FEE
 
We currently permit 15 free transfers between investment options each contract
year. We charge you $25 for each additional transfer that contract year ($10 in
Pennsylvania and Texas). SEE INVESTMENT OPTIONS ON PAGE 6.
 
PREMIUM TAX
 
Certain states charge the Company a tax on the premiums you pay into the
contract. We deduct from your contract these premium tax charges. Currently we
deduct the charge for premium taxes when you take a full withdrawal or begin the
Income Phase of the contract. In the future, we may assess this deduction at the
time you put Purchase Payment(s) into the contract or upon payment of a death
benefit.
 
APPENDIX C provides more information about premium taxes.
 
INCOME TAXES
 
We do not currently deduct income taxes from your contract. We reserve the right
to do so in the future.
 
REDUCTION OR ELIMINATION OF CHARGES AND EXPENSES, AND ADDITIONAL AMOUNTS
CREDITED
 
Sometimes sales of the contracts to groups of similarly situated individuals may
lower our administrative and/or sales expenses. We reserve the right to reduce
or waive certain charges and expenses when this type of sale occurs. In
addition, we may also credit additional interest to policies sold to such
groups. We determine which groups are eligible for such treatment. Some of the
criteria we evaluate to make a determination are: size of the group; amount of
expected Purchase Payments; relationship existing between us and prospective
purchaser; nature of the purchase; length of time a group of contracts is
expected to remain active; purpose of the purchase and whether that purpose
increases the likelihood that our expenses will be reduced; and/or any other
factors that we believe indicate that administrative and/or sales expenses may
be reduced.
 
Anchor National may make such a determination regarding sales to its employees,
it affiliates' employees and employees of currently contracted broker-dealers;
its registered representatives and immediate family members of all of those
described.
 
We reserve the right to change or modify any such determination or the treatment
applied to a particular group, at any time.
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                                 INCOME OPTIONS
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
ANNUITY DATE
 
   
During the Income Phase, we use the money accumulated in your contract to make
regular income payments to you. You may switch to the Income Phase any time
after your 2nd contract anniversary. You select the month and year you want
income payments to begin. The first day of that month is the Annuity Date. You
may change your Annuity Date, so long as you do so at least seven days before
the income payments are scheduled to begin. Once you begin receiving income
payments, you cannot change your income option. Except as indicated under Option
5 below, once you begin receiving income payments, you cannot otherwise access
your money through a withdrawal or surrender.
    
 
                                       12
<PAGE>   21
 
Income payments must begin on or before your 90th birthday or on your tenth
contract anniversary, whichever occurs later. If you do not choose an Annuity
Date, your income payments will automatically begin on this date. Certain states
may require your income payments to start earlier.
 
If the Annuity Date is past your 85th birthday, your contract could lose its
status as an annuity under Federal tax laws. This may cause you to incur adverse
tax consequences.
 
In addition, most Qualified contracts require you to take minimum distributions
after you reach age 70 1/2. SEE TAXES ON PAGE 14.
 
INCOME OPTIONS
 
Currently, this Contract offers five income options. If you elect to receive
income payments but do not select an option, your income payments will be made
in accordance with option 4 for a period of 10 years. For income payments based
on joint lives, we pay according to option 3.
 
We base our calculation of income payments on the life of the Annuitant and the
annuity rates set forth in your contract. As the contract owner, you may change
the Annuitant at any time prior to the Annuity Date. You must notify us if the
Annuitant dies before the Annuity Date and designate a new Annuitant.
 
     OPTION 1 - LIFE INCOME ANNUITY
 
This option provides income payments for the life of the Annuitant. Income
payments stop when the Annuitant dies.
 
     OPTION 2 - JOINT AND SURVIVOR LIFE ANNUITY
 
This option provides income payments for the life of the Annuitant and for the
life of another designated person. Upon the death of either person, we will
continue to make income payments during the lifetime of the survivor. Income
payments stop when the survivor dies.
 
     OPTION 3 - JOINT AND SURVIVOR LIFE ANNUITY WITH 10 OR 20 YEARS GUARANTEED
 
This option is similar to option 2 above, with an additional guarantee of
payments for at least 10 years. If the Annuitant and the survivor die before all
of the guaranteed income payments have been made, the remaining payments are
made to the Beneficiary under your contract.
 
     OPTION 4 - LIFE ANNUITY WITH 10 OR 20 YEARS GUARANTEED
 
This option is similar to option 1 above. In addition, this option provides a
guarantee that income payments will be made for at least 10 or 20 years. You
select the number of years. If the Annuitant dies before all guaranteed income
payments are made, the remaining income payments go to the Beneficiary under
your contract.
     OPTION 5 - INCOME FOR A SPECIFIED PERIOD
 
   
This option provides income payments for a guaranteed period ranging from 5 to
30 years. If the Annuitant dies before all the guaranteed income payments are
made, the remaining income payments are made to the Beneficiary under your
contract. Additionally, if variable income payments are elected under this
option, you (or the Beneficiary under the contract if the Annuitant dies prior
to all guaranteed payments being made) may redeem the contract value after the
Annuity Date. The amount available upon such redemption would be the discounted
present value of any remaining guaranteed payments.
    
 
   
The value of an Annuity Unit, regardless of the option chosen, takes into
account the Mortality and Expense Risk Charge. Since Option 5 does not contain
an element of mortality risk, no benefit is derived from this charge.
    
 
Please read the Statement of Additional Information ("SAI") for a more detailed
discussion of the income options.
 
FIXED OR VARIABLE INCOME PAYMENTS
 
You can choose income payments that are fixed, variable or both. If at the date
when income payments begin you are invested in the Variable Portfolios only,
your income payments will be variable. If your money is only in fixed accounts
at that time, your income payments will be fixed in amount. Further, if you are
invested in both fixed and variable investment options when income payments
begin, your payments will be fixed and variable. If income payments are fixed,
Anchor National guarantees the amount of each payment. If the income payments
are variable the amount is not guaranteed.
 
INCOME PAYMENTS
 
We make income payments on a monthly, quarterly, semiannual or annual basis. You
instruct us to send you a check or to have the payments directly deposited into
your bank account. If state law allows, we distribute annuities with a contract
value of $5,000 or less in a lump sum. Also, if the selected income option
results in income payments of less than $50 per payment, we may decrease the
frequency of payments, state law allowing.
 
If you are invested in the Variable Portfolios after the Annuity date, your
income payments vary depending on four things:
 
     - for life options, your age when payments begin, and;
 
     - the value of your contract in the Variable Portfolios on the Annuity
       Date, and;
 
     - the 3.5% assumed investment rate used in the annuity table for the
       contract, and;
 
     - the performance of the Variable Portfolios in which you are invested
       during the time you receive income payments.
 
                                       13
<PAGE>   22
 
If you are invested in both the fixed account options and the Variable
Portfolios after the Annuity Date, the allocation of funds between the fixed and
variable options also impacts the amount of your annuity payments.
 
TRANSFERS DURING THE INCOME PHASE
 
During the Income Phase, one transfer per month is permitted between the
Variable Portfolios. No other transfers are allowed during the Income Phase.
 
DEFERMENT OF PAYMENTS
 
We may defer making fixed payments for up to six months, or less if required by
law. Interest is credited to you during the deferral period.
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                                      TAXES
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
   
NOTE: WE PREPARED THE FOLLOWING INFORMATION ON TAXES AS A GENERAL DISCUSSION OF
THE SUBJECT. IT IS NOT TAX ADVICE. WE CAUTION YOU TO SEEK COMPETENT TAX ADVICE
ABOUT YOUR OWN CIRCUMSTANCES. WE DO NOT GUARANTEE THE TAX STATUS OF YOUR
ANNUITY. TAX LAWS CONSTANTLY CHANGE, THEREFORE WE CANNOT GUARANTEE THAT THE
INFORMATION CONTAINED HEREIN IS COMPLETE AND/OR ACCURATE.
    
 
ANNUITY CONTRACTS IN GENERAL
 
The Internal Revenue Code ("IRC") provides for special rules regarding the tax
treatment of annuity contracts. Generally, taxes on the earnings in your annuity
contract are deferred until you take the money out. Different rules apply
depending on how you take the money out and whether your contract is Qualified
or Non-qualified.
 
If you do not purchase your contract under a pension plan, a specially sponsored
employer program or an individual retirement account, your contract is referred
to as a Non-qualified contract. A Non-qualified contract receives different tax
treatment than a Qualified contract. In general, your cost basis in a
Non-qualified contract is equal to the Purchase Payments you put into the
contract. You have already been taxed on the cost basis in your contract.
 
If you purchase your contract under a pension plan, a specially sponsored
employer program or as an individual retirement account, your contract is
referred to as a Qualified contract. Examples of qualified plans are: Individual
Retirement Accounts ("IRAs"), Roth IRAs, Tax-Sheltered Annuities (referred to as
403(b) contracts), H.R. 10 Plans (referred to as Keogh Plans) and pension and
profit sharing plans, including 401(k) plans. Typically you have not paid any
tax on the Purchase Payments used to buy your contract and therefore, you have
no cost basis in your contract.
 
TAX TREATMENT OF DISTRIBUTIONS -
NON-QUALIFIED CONTRACTS
 
If you make a withdrawal from a Non-qualified contract, the IRC treats such a
withdrawal as first coming from the earnings and then as coming from your
Purchase Payments. For income payments, any portion of each payment that is
considered a return of your Purchase Payment will not be taxed. Withdrawn
earnings are treated as income to you and are taxable. The IRC provides for a
10% penalty tax on any earnings that are withdrawn other than in conjunction
with the following circumstances: (1) after reaching age 59 1/2; (2) when paid
to your Beneficiary after you die; (3) after you become disabled (as defined in
the IRC); (4) when paid in a series of substantially equal installments made for
your life or for the joint lives of you and you Beneficiary; (5) under an
immediate annuity; or (6) which come from Purchase Payments made prior to August
14, 1982.
 
TAX TREATMENT OF DISTRIBUTIONS - QUALIFIED CONTRACTS
 
Generally, you have not paid any taxes on the Purchase Payments used to buy a
Qualified contract. Any amount of money you take out as a withdrawal or as
income payments is taxable income. The IRC further provides for a 10% penalty
tax on any withdrawal or income payment paid to you other than in conjunction
with the following circumstances: (1) after reaching age 59 1/2; (2) when paid
to your Beneficiary after you die; (3) after you become disabled (as defined in
the IRC); (4) in a series of substantially equal installments made for your life
or for the joint lives of you and your Beneficiary; (5) to the extent such
withdrawals do not exceed limitations set by the IRC for amounts paid during the
taxable year for medical care; (6) to fund higher education expenses (as defined
in IRC); (7) to fund certain first-time home purchase expenses; and, except in
the case of an IR; (8) when you separate from service after attaining age 55;
and (9) when paid to an alternate payee pursuant to a qualified domestic
relations order.
 
The IRC limits the withdrawal of Purchase Payments from certain Tax-Sheltered
Annuities. Withdrawals can only be made when an owner: (1) reaches age 59 1/2;
(2) leaves his or her job; (3) dies; (4) becomes disabled (as defined in the
IRC); or (5) experiences a hardship (as defined in the IRC). In the case of
hardship, the owner can only withdraw Purchase Payments.
 
MINIMUM DISTRIBUTIONS
 
Generally, the IRS requires that you begin taking annual distributions from
qualified annuity contracts by April 1 of the calendar year following the later
of (1) the calendar year in which you attain age 70 1/2 or (2) the calendar year
in which you retire. Failure to satisfy minimum distribution requirements may
result in a tax penalty. You should consult your tax advisor for more
information.
 
                                       14
<PAGE>   23
 
DIVERSIFICATION
 
The IRC imposes certain diversification requirements on the underlying
investments for a variable annuity. We believe that each underlying Variable
Portfolios' management monitors the Variable Portfolios so as to comply with
these requirements. To be treated as a variable annuity for tax purposes, the
underlying investments must meet these requirements.
 
The diversification regulations do not provide guidance as to the circumstances
under which you, because of the degree of control you exercise over the
underlying investments, and not Anchor National, would be considered the owner
of the shares of the Variable Portfolios. It is unknown to what extent owners
are permitted to select investments, to make transfers among Variable Portfolios
or the number and type of Variable Portfolios owners may select from. If any
guidance is provided which is considered a new position, then the guidance would
generally be applied prospectively. However, if such guidance is considered not
to be a new position, it may be applied retroactively. This would mean you, as
the owner of the contract, could be treated as the owner of the underlying
Variable Portfolios. Due to the uncertainty in this area, we reserve the right
to modify the contract in an attempt to maintain favorable tax treatment.
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                                   PERFORMANCE
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
We advertise the Cash Management Portfolio's yield and effective yield. In
addition, the other Variable Portfolios advertise total return, gross yield and
yield-to-maturity. These figures represent past performance of the Variable
Portfolios. These performance numbers do not indicate future results.
 
When we advertise performance for periods prior to the date the contracts were
first issued, we derive the figures from the performance of the corresponding
portfolios for the Trusts, if available. We modify these numbers to reflect
charges and expenses as if the contract was in existence during the period
stated in the advertisement. Figures calculated in this manner do not represent
actual historic performance of the particular Variable Portfolio.
 
Consult the SAI for more detailed information regarding the calculation of
performance data. The performance of each Variable Portfolio may also be
measured against unmanaged market indices. The indices we use include but are
not limited to the Dow Jones Industrial Average, the Standard & Poor's 500, the
Russell 1000 Growth Index, the Morgan Stanley Capital International Europe,
Australia and Far East Index ("EAFE") and the Morgan Stanley Capital
International World Index. We may compare the Variable Portfolios' performance
to that of other variable annuities with similar objectives and policies as
reported by independent ranking agencies such as Morningstar, Inc., Lipper
Analytical Services, Inc. or Variable Annuity Research & Data Service ("VARDS").
 
Anchor National may also advertise the rating and other information assigned to
it by independent industry ratings organizations. Some of those organizations
are A.M. Best Company ("A.M. Best"), Moody's Investor's Service ("Moody's"),
Standard & Poor's Insurance Rating Services ("S&P"), and Duff & Phelps. A.M.
Best's and Moody's ratings reflect their current opinion of our financial
strength and performance in comparison to others in the life and health
insurance industry. S&P's and Duff & Phelps' ratings measure the ability of an
insurance company to meet its obligations under insurance policies it issues.
These two ratings do not measure the insurer's ability to meet non-policy
obligations. Ratings in general do not relate to the performance of the Variable
Portfolios.
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
                                OTHER INFORMATION
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
ANCHOR NATIONAL
 
Anchor National is a stock life insurance company originally organized under the
laws of the state of California in April 1965. On January 1, 1996, Anchor
National redomesticated under the laws of the state of Arizona.
 
   
Anchor National and its affiliates, SunAmerica Life Insurance Company, First
SunAmerica Life Insurance Company, CalAmerica Life Insurance Company, SunAmerica
National Life Insurance Company, SunAmerica Asset Management, Resources Trust
Company, and six broker-dealers, specialize in retirement savings and investment
products and services. Business focuses include fixed and variable annuities,
mutual funds, premium finance, broker-dealer services and trust administration
services.
    
 
THE SEPARATE ACCOUNT
 
Anchor National originally established a separate account, Variable Separate
Account ("separate account"), under Arizona law on January 1, 1996 when it
assumed the separate account, originally established under California law on
June 25, 1981. The separate account is registered with the SEC as a unit
investment trust under the Investment Company Act of 1940, as amended.
 
Anchor National owns the assets in the separate account. However, the assets in
the separate account are not chargeable with liabilities arising out of any
other business conducted by Anchor National. Income gains and losses (realized
and unrealized) resulting from assets in the separate account are credited to or
charged against the separate account without regard to other income gains or
losses of Anchor National.
 
                                       15
<PAGE>   24
 
THE GENERAL ACCOUNT
 
Money allocated to the fixed account options goes into Anchor National's general
account. The general account consists of all of Anchor National's assets other
than assets attributable to a separate account. All of the assets in the general
account are chargeable with the claims of any Anchor National contract holders
as well as all of its creditors. The general account funds are invested as
permitted under state insurance laws.
 
DISTRIBUTION OF THE CONTRACT
 
Registered representatives of broker-dealers sell the contract. We pay
commissions to these representatives for the sale of the contracts. We do not
expect the total commissions to exceed 7% of your Purchase Payments. We may also
pay a bonus to representatives for contracts which stay active for a particular
period of time, in addition to standard commissions. We do not deduct
commissions paid to registered representatives directly from your Purchase
Payments.
 
From time to time, we may pay or allow additional promotional incentives in the
form of cash or other compensation. We reserve the right to offer these
additional incentives only to certain broker-dealers that sell or are expected
to sell, certain minimum amounts of the contract, or other contracts offered by
us. Promotional incentives may change at any time.
 
   
SunAmerica Capital Services, Inc., 733 Third Avenue, 4th Floor, New York, New
York 10017 distributes the contracts. SunAmerica Capital Services is an
affiliate of , a registered as a broker-dealer under the Exchange Act of 1934
and a member of the National Association of Securities Dealers, Inc. No
underwriting fees are paid in connection with the distribution of the contracts.
    
 
ADMINISTRATION
 
We are responsible for the administrative servicing of your contract. Please
contact our Annuity Service Center
at 1-800-445-SUN2, if you have any comment, question or service request.
 
We send out transaction confirmations and quarterly statements. It is your
responsibility to review these documents carefully and notify us of any
inaccuracies immediately. We investigate all inquiries. To the extent that we
believe we made an error, we retroactively adjust your contract, provided you
notify us within 30 days of receiving the transaction confirmation or quarterly
statement. Any other adjustments we deem warranted are made as of the time we
receive notice of the error.
 
YEAR 2000
 
We rely significantly on computer systems and applications in our daily
operations. Many of our systems are not presently year 2000 compliant, which
means that because they have historically used only two digits to identify the
year in a date, they will fail to distinguish dates in the "2000s" from dates in
the "1900s." Anchor National's business, financial condition and results of
operations could be materially and adversely affected by the failure of our
systems and applications (and those operated by third parties interfacing with
our systems and applications) to properly operate or manage these dates.
 
   
Anchor National has a coordinated plan to repair or replace these noncompliant
systems and to obtain similar assurances from third parties interfacing with our
systems and applications. In fiscal 1997, the Company recorded a $6.2 million
provision for estimated programming costs to repair noncompliant systems. Anchor
National's management is making expenditures which we expect will ultimately
total $5.0 million to replace certain other noncompliant systems. Total
expenditures relating to the repair of noncompliant systems will be capitalized
by the Company as software costs and will be paid for over future periods. Both
phases of the project are progressing according to plan and we expect to
substantially complete them by the end of calendar 1998. We will test both the
repaired and replacement systems during calendar 1999.
    
 
In addition, we distributed a year 2000 questionnaire to our significant
suppliers, distributors, financial institutions, lessors and others we do
business with to evaluate their year 2000 compliance plans and state of
readiness and to determine how our systems and applications may be affected by
their failure to solve their own year 2000 issues. To date, however, we have
only received preliminary feedback from such parties and have not independently
confirmed any information received from other parties with respect to the year
2000 issues. Therefore, we cannot assure that such other parties will complete
their year 2000 conversions in a timely fashion or will not suffer a year 2000
business disruption that may adversely affect our financial condition and
results of operations.
 
Because we expect to complete our year 2000 conversion prior to any potential
disruption to our business, we have not developed a comprehensive year 2000
contingency plan. Anchor National closely monitors the progression of its plan
for compliance, and if necessary, would devote additional resources to assure
the timely completion of our year 2000 plan. If we determine that our business
is at material risk of disruption due to the year 2000 issue or anticipate that
we will not complete our year 2000 conversion in a timely fashion, we will work
to enhance our contingency plans.
 
The above statements are forward-looking. The costs of our year 2000 conversion,
the date which we have set to complete such conversion and the possible risks
associated with the year 2000 issue are based on our current estimates and are
subject to various uncertainties that could cause the actual results to differ
materially from our expectations. Such uncertainties include, among others, our
success in identifying systems and applications that are not year 2000
compliant,
 
                                       16
<PAGE>   25
 
the nature and amount of programming required to upgrade or replace each of the
affected systems and applications, the availability of qualified personnel,
consultants and other resources, and the success of the year 2000 conversion
efforts of others.
 
LEGAL PROCEEDINGS
 
There are no pending legal proceedings affecting the separate account. Anchor
National and its subsidiaries engage in various kinds of routine litigation. In
management's opinion, these matters are not of material importance to their
respective total assets nor are they material with respect to the separate
account.
 
OWNERSHIP
 
The Polaris Variable Annuity is a Flexible Payment Group Deferred Annuity
contract. We issue a group contract to a contract holder for the benefit of the
participants in the group. As a participant in the group, you will receive a
certificate which evidences your ownership. As used in this prospectus, the term
contract refers to your certificate. In some states, a Flexible Payment
Individual Modified Guaranteed and Variable Deferred Annuity contract is
available instead. Such a contract is identical to the contract described in
this prospectus, with the exception that we issue it directly to the owner.
 
CUSTODIAN
 
State Street Bank and Trust Company, 255 Franklin Street, Boston, Massachusetts
02110, serves as the custodian of the assets of the separate account. Anchor
National pays State Street Bank for services provided, based on a schedule of
fees.
 
ADDITIONAL INFORMATION
 
Anchor National is subject to the informational requirements of the Securities
and Exchange Act of 1934 (as amended). We file reports and other information
with the SEC to meet those requirements. You can inspect and copy this
information at SEC public facilities at the following locations:
 
WASHINGTON, DISTRICT OF COLUMBIA
450 Fifth Street, N.W., Room 1024
Washington, D.C. 20549
 
CHICAGO, ILLINOIS
500 West Madison Street
Chicago, IL 60661
 
NEW YORK, NEW YORK
7 World Trade Center, 13th Fl.
New York, NY 10048
 
To obtain copies by mail contact the Washington, D.C. location. After you pay
the fees as prescribed by the rules and regulations of the SEC, the required
documents are mailed.
 
Registration statements under the Securities Act of 1933, as amended, related to
the contracts offered by this prospectus are on file with the SEC. This
prospectus does not contain all of the information contained in the registration
statements and its exhibits. For further information regarding the separate
account, Anchor National and its general account, the Variable Portfolios and
the contract, please refer to the registration statement and its exhibits.
 
The SEC also maintains a website (http://www.sec.gov) that contains the SAI,
materials incorporated by reference and other information filed electronically
with the SEC by Anchor National.
 
                                       17
<PAGE>   26
 
SELECTED CONSOLIDATED FINANCIAL DATA
 
The following selected consolidated financial data of the Company and its
subsidiaries should be read in conjunction with the consolidated financial
statements and notes thereto and Management's Discussion and Analysis of
Financial Condition and Results of Operations, both of which are included
elsewhere herein.
 
<TABLE>
<CAPTION>
                                                                            YEARS ENDED SEPTEMBER 30,
                                                         ----------------------------------------------------------------
                 RESULTS OF OPERATIONS                      1998          1997          1996         1995         1994
                 ---------------------                   -----------   -----------   ----------   ----------   ----------
                                                                                  (IN THOUSANDS)
<S>                                                      <C>           <C>           <C>          <C>          <C>
Net investment income..................................  $    86,872   $    73,201   $   56,843   $   50,083   $   58,996
Net realized investment gains (losses).................       19,482       (17,394)     (13,355)      (4,363)     (33,713)
Fee income.............................................      290,362       213,146      169,505      145,105      141,753
General and administrative expenses....................      (96,102)      (98,802)     (81,552)     (64,457)     (54,363)
Amortization of deferred acquisition costs.............      (72,713)      (66,879)     (57,520)     (58,713)     (44,195)
Annual commissions.....................................      (18,209)       (8,977)      (4,613)      (2,658)      (1,158)
                                                         -----------   -----------   ----------   ----------   ----------
Pretax income..........................................      209,692        94,295       69,308       64,997       67,320
Income tax expense.....................................      (71,051)      (31,169)     (24,252)     (25,739)     (22,705)
                                                         -----------   -----------   ----------   ----------   ----------
Income before cumulative effect of change in accounting
  for income taxes.....................................      138,641        63,126       45,056       39,258       44,615
Cumulative effect of change in accounting for income
  taxes................................................           --            --           --           --      (20,463)
                                                         -----------   -----------   ----------   ----------   ----------
Net income.............................................  $   138,641   $    63,126   $   45,056   $   39,258   $   24,152
                                                         ===========   ===========   ==========   ==========   ==========
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                 AT SEPTEMBER 30,
                                                         ----------------------------------------------------------------
                  FINANCIAL POSITION                        1998          1997          1996         1995         1994
                  ------------------                     -----------   -----------   ----------   ----------   ----------
                                                                                  (IN THOUSANDS)
<S>                                                      <C>           <C>           <C>          <C>          <C>
Investments............................................  $ 2,734,742   $ 2,608,301   $2,329,232   $2,114,908   $1,632,072
Variable annuity assets held in separate accounts......   11,133,569     9,343,200    6,311,557    5,230,246    4,486,703
Deferred acquisition costs.............................      539,850       536,155      443,610      383,069      416,289
Other assets...........................................      118,203        83,283      120,136       55,474       67,062
                                                         -----------   -----------   ----------   ----------   ----------
         Total assets..................................  $14,526,364   $12,570,939   $9,204,535   $7,783,697   $6,602,126
                                                         ===========   ===========   ==========   ==========   ==========
Reserves for fixed annuity contracts...................  $ 2,189,272   $ 2,098,803   $1,789,962   $1,497,052   $1,437,488
Reserves for guaranteed investment contracts...........      282,267       295,175      415,544      277,095           --
Variable annuity liabilities related to separate
  accounts.............................................   11,133,569     9,343,200    6,311,557    5,230,246    4,486,703
Other payables and accrued liabilities.................      133,647       155,256       96,196      227,953      195,134
Subordinated notes payable to Parent...................       39,182        36,240       35,832       35,832       34,712
Deferred income taxes..................................       95,758        67,047       70,189       73,459       64,567
Shareholder's equity...................................      652,669       575,218      485,255      442,060      383,522
                                                         -----------   -----------   ----------   ----------   ----------
         Total liabilities and shareholder's equity....  $14,526,364   $12,570,939   $9,204,535   $7,783,697   $6,602,126
                                                         ===========   ===========   ==========   ==========   ==========
</TABLE>
 
                                       18
<PAGE>   27
 
MANAGEMENT DISCUSSION AND ANALYSIS
 
Management's discussion and analysis of financial condition and results of
operations of Anchor National Life Insurance Company (the "Company") for the
three years in the period ended September 30, 1998 follows. In connection with
the "safe harbor" provisions of the Private Securities Litigation Reform Act of
1995, the Company cautions readers regarding certain forward-looking statements
contained in this report and in any other statements made by, or on behalf of,
the Company, whether or not in future filings with the Securities and Exchange
Commission (the "SEC"). Forward-looking statements are statements not based on
historical information and which relate to future operations, strategies,
financial results, or other developments. Statements using verbs such as
"expect," "anticipate," "believe" or words of similar import generally involve
forward-looking statements. Without limiting the foregoing, forward-looking
statements include statements which represent the Company's beliefs concerning
future levels of sales and redemptions of the Company's products, investment
spreads and yields, or the earnings and profitability of the Company's
activities.
 
Forward-looking statements are necessarily based on estimates and assumptions
that are inherently subject to significant business, economic and competitive
uncertainties and contingencies, many of which are beyond the Company's control
and many of which are subject to change. These uncertainties and contingencies
could cause actual results to differ materially from those expressed in any
forward-looking statements made by, or on behalf of, the Company. Whether or not
actual results differ materially from forward-looking statements may depend on
numerous foreseeable and unforeseeable developments. Some may be national in
scope, such as general economic conditions, changes in tax law and changes in
interest rates. Some may be related to the insurance industry generally, such as
pricing competition, regulatory developments and industry consolidation. Others
may relate to the Company specifically, such as credit, volatility and other
risks associated with the Company's investment portfolio. Investors are also
directed to consider other risks and uncertainties discussed in documents filed
by the Company with the SEC. The Company disclaims any obligation to update
forward-looking information.
 
RESULTS OF OPERATIONS
 
NET INCOME totaled $138.6 million in 1998, compared with $63.1 million in 1997
and $45.1 million in 1996.
 
PRETAX INCOME totaled $209.7 million in 1998, $94.3 million in 1997 and $69.3
million in 1996. The 122.4% improvement in 1998 over 1997 primarily resulted
from increased fee income and higher net realized investment gains, partially
offset by increased annual commissions and increased amortization of deferred
acquisition costs. The 36.1% improvement in 1997 over 1996 primarily resulted
from increased fee income and net investment income, partially offset by higher
general and administrative expenses and increased amortization of deferred
acquisition costs.
 
NET INVESTMENT INCOME, which is the spread between the income earned on invested
assets and the interest paid on fixed annuities and other interest-bearing
liabilities, increased to $86.9 million in 1998 from $73.2 million in 1997 and
$56.8 million in 1996. These amounts represent 3.34% on average invested assets
(computed on a daily basis) of $2.60 billion in 1998, 2.77% on average invested
assets of $2.65 billion in 1997 and 2.59% on average invested assets of $2.19
billion in 1996.
 
Net investment spreads include the effect of income earned on the excess of
average invested assets over average interest-bearing liabilities. This excess
amounted to $140.4 million in 1998, $126.5 million in 1997 and $142.9 million in
1996. The difference between the Company's yield on average invested assets and
the rate paid on average interest-bearing liabilities (the "Spread Difference")
was 3.04% in 1998, 2.51% in 1997 and 2.25% in 1996.
 
Investment income (and the related yields on average invested assets) totaled
$222.0 million (8.53%) in 1998, compared with $210.8 million (7.97%) in 1997 and
$164.6 million (7.50%) in 1996. These increased yields in 1998 and 1997 include
the effects of an increasing proportion of mortgage loans in the Company's
portfolio. On average, mortgage loans have higher yields than that of the
Company's overall portfolio. In addition, the Company experienced higher returns
on its investments in partnerships, particularly in 1998. The increase in
investment income in 1997 also reflects an increase in average invested assets.
 
Partnership income increased to $24.3 million (a yield of 174.85% on related
average assets of $13.9 million) in 1998, compared with $6.7 million (a yield of
15.28% on related average assets of $44.0 million) in 1997 and $4.1 million (a
yield of 10.12% on related average assets of $40.2 million) in 1996. Partnership
income is based primarily upon cash distributions received from limited
partnerships, the operations of which the Company does not influence.
Consequently, such income is not predictable and there can be no assurance that
the Company will realize comparable levels of such income in the future.
 
Total interest expense equalled $135.1 million in 1998, $137.6 million in 1997
and $107.8 million in 1996. The average rate paid on all interest-bearing
liabilities was 5.49% in 1998, compared with 5.46% in 1997 and 5.25% in 1996.
Interest-bearing liabilities averaged $2.46 billion during 1998, compared with
$2.52 billion during 1997 and $2.05 billion during 1996. The increases in the
overall rates paid on interest-bearing liabilities primarily resulted from the
impact of certain promotional one-year interest rates offered on the fixed
account portion of the Company's Polaris and Seasons variable annuity products.
 
                                       19
<PAGE>   28
 
The modest decline in average invested assets in 1998 reflects a similar modest
decline in average interest-bearing liabilities, which results from the net
effect of increased sales of the Company's fixed rate products and net exchanges
from fixed accounts into the separate accounts of variable annuity contracts.
Fixed annuity premiums totaled $1.51 billion in 1998, compared with $1.10
billion in 1997 and $741.8 million in 1996 and are largely premiums for the
fixed accounts of variable annuities. These amounts represent 72%, 61% and 50%
of the fixed annuity reserve balances at the beginning of the respective
periods. The premiums for the fixed accounts of variable annuities have
increased primarily because of increased sales of the Company's variable annuity
products and greater inflows into the one-year fixed account and the new
six-month fixed account of these products, which are used for dollar cost
averaging into the variable accounts. Accordingly, the Company anticipates that
it will see a large portion of these premiums transferred into the variable
funds.
 
Guaranteed investment contract ("GIC") premiums totaled $5.6 million in 1998,
$55.0 million in 1997 and $135.0 million in 1996. GIC surrenders and maturities
totaled $36.3 million in 1998, $198.1 million in 1997 and $16.5 million in 1996.
The Company does not actively market GICs; consequently, premiums and surrenders
may vary substantially from period to period. The GICs issued by the Company
generally guarantee the payment of principal and interest at fixed or variable
rates for a term of three to five years. GICs that are purchased by banks for
their long-term portfolios or by state and local governmental entities either
prohibit withdrawals or permit scheduled book value withdrawals subject to the
terms of the underlying indenture or agreement. GICs purchased by asset
management firms for their short-term portfolios either prohibit withdrawals or
permit withdrawals with notice ranging from 90 to 270 days. In pricing GICs, the
Company analyzes cash flow information and prices accordingly so that it is
compensated for possible withdrawals prior to maturity.
 
NET REALIZED INVESTMENT GAINS totaled $19.5 million in 1998, compared with net
realized investment losses of $17.4 million in 1997 and $13.4 million in 1996.
Net realized investment gains (losses) include impairment writedowns of $13.1
million in 1998, $20.4 million in 1997 and $16.0 million in 1996. Thus, net
gains from sales and redemptions of investments totaled $32.6 million in 1998,
$3.0 million in 1997 and $2.6 million in 1996.
 
The Company sold or redeemed invested assets, principally bonds and notes,
aggregating $2.23 billion in 1998, $2.62 billion in 1997 and $1.60 billion in
1996, respectively. Sales of investments result from the active management of
the Company's investment portfolio. Because redemptions of investments are
generally involuntary and sales of investments are made in both rising and
falling interest rate environments, net gains from sales and redemptions of
investments fluctuate from period to period, and represent 1.25%, 0.11% and
0.12% of average invested assets for 1998, 1997 and 1996, respectively. Active
portfolio management involves the ongoing evaluation of asset sectors,
individual securities within the investment portfolio and the reallocation of
investments from sectors that are perceived to be relatively overvalued to
sectors that are perceived to be relatively undervalued. The intent of the
Company's active portfolio management is to maximize total returns on the
investment portfolio, taking into account credit, option, liquidity and
interest-rate risk.
 
Impairment writedowns include $9.4 million of provisions applied to partnerships
during 1998 and $15.7 million and $15.2 million of provisions applied to
non-income producing land owned in Arizona during 1997 and 1996, respectively.
The statutory carrying value of this land had been guaranteed by the Company's
ultimate Parent, SunAmerica Inc. ("SunAmerica"). SunAmerica made a capital
contribution of $28.4 million on December 31, 1996 to the Company through the
Company's direct parent in exchange for the termination of its guaranty with
respect to this land. Accordingly, the Company reduced the carrying value of
this land to estimated fair value to reflect the full termination of the
guaranty. Impairment writedowns represent 0.50%, 0.77% and 0.73% of average
invested assets for 1998, 1997 and 1996, respectively. For the five years ended
September 30, 1998, impairment writedowns as a percentage of average invested
assets have ranged from 0.28% to 0.91% and have averaged 0.64%. Such writedowns
are based upon estimates of the net realizable value of the applicable assets.
Actual realization will be dependent upon future events.
 
VARIABLE ANNUITY FEES are based on the market value of assets in separate
accounts supporting variable annuity contracts. Such fees totaled $200.9 million
in 1998, $139.5 million in 1997 and $104.0 million in 1996. These increased fees
reflect growth in average variable annuity assets, due to increased market
values, the receipt of variable annuity premiums and net exchanges into the
separate accounts from the fixed accounts of variable annuity contracts,
partially offset by surrenders. Variable annuity fees represent 1.9%, 1.8% and
1.8% of average variable annuity assets for 1998, 1997 and 1996, respectively.
Variable annuity assets averaged $10.70 billion during 1998, $7.55 billion
during 1997 and $5.70 billion during 1996. Variable annuity premiums, which
exclude premiums allocated to the fixed accounts of variable annuity products,
have aggregated $1.82 billion in 1998, $1.27 billion in 1997 and $919.8 million
in 1996. These amounts represent 19%, 20% and 18% of variable annuity reserves
at the beginning of the respective periods.
 
Sales of variable annuity products (which include premiums allocated to the
fixed accounts) ("Variable Annuity Product Sales") amounted to $3.33 billion,
$2.37 billion and $1.66 billion in 1998, 1997 and 1996, respectively, and
primarily reflect sales of the Company's flagship variable annuity, Polaris.
Polaris is a multimanager variable annuity
 
                                       20
<PAGE>   29
 
that offers investors a choice of 26 variable funds and 7 guaranteed fixed-rate
funds. Increases in Variable Annuity Product Sales are due, in part, to market
share gains through enhanced distribution efforts and growing consumer demand
for flexible retirement savings products that offer a variety of equity, fixed
income and guaranteed fixed account investment choices. In recent weeks,
subsequent to the Company's fiscal year end, sales of variable annuities have
slowed as investors paused to reevaluate their investment decisions in light of
volatile markets. The Company believes that fluctuating market conditions
increase the value of financial planning services and make the flexibility and
security of variable annuities even more attractive.
 
The Company has encountered increased competition in the variable annuity
marketplace during recent years and anticipates that the market will remain
highly competitive for the foreseeable future. Also, from time to time, Federal
initiatives are proposed which could affect the taxation of variable annuities
and annuities generally.
 
NET RETAINED COMMISSIONS are primarily derived from commissions on the sales of
nonproprietary investment products by the Company's broker-dealer subsidiary,
after deducting the substantial portion of such commissions that is passed on to
registered representatives. Net retained commissions totaled $48.6 million in
1998, $39.1 million in 1997 and $31.5 million in 1996. Broker-dealer sales
(mainly sales of general securities, mutual funds and annuities) totaled $14.37
billion in 1998, $11.56 billion in 1997 and $8.75 billion in 1996. The increases
in sales and net retained commissions reflect higher average production per
representative and generally favorable market conditions and, in 1997, a greater
number of registered representatives due primarily to the transfer of
representatives from an affiliated broker-dealer. Increases in net retained
commissions may not be proportionate to increases in sales primarily due to
differences in sales mix.
 
SURRENDER CHARGES on fixed and variable annuities totaled $7.4 million in 1998,
$5.5 million in 1997 and $5.2 million in 1996. Surrender charges generally are
assessed on annuity withdrawals at declining rates during the first seven years
of an annuity contract. Withdrawal payments, which include surrenders and
lump-sum annuity benefits, totaled $1.14 billion in 1998, $1.06 billion in 1997
and $898.0 million in 1996. These payments represent 9.0%, 11.2% and 12.4%,
respectively, of average fixed and variable annuity reserves. Withdrawals
include variable annuity withdrawals from the separate accounts totaling $952.1
million (8.9% of average variable annuity reserves), $822.0 million (10.9% of
average variable annuity reserves) and $634.1 million (11.2% of average variable
reserves) in 1998, 1997 and 1996, respectively. Management anticipates that
withdrawal rates will remain relatively stable for the foreseeable future.
 
ASSET MANAGEMENT FEES, which include investment advisory fees and 12b-1
distribution fees, are based on the market value of assets managed in mutual
funds by SunAmerica Asset Management Corp. Such fees totaled $29.6 million on
average assets managed of $2.89 billion in 1998, $25.8 million on average assets
managed of $2.34 billion in 1997 and $25.4 million on average assets managed of
$2.14 billion in 1996. Asset management fees are not proportionate to average
assets managed, principally due to changes in product mix. Sales of mutual
funds, excluding sales of money market accounts, aggregated $853.6 million in
1998, compared with $454.8 million in 1997 and $223.4 million in 1996. The
significant increases in sales principally resulted from sales of the Company's
"Style Select Series" product (which was introduced in November 1996) and the
introduction in June 1998 of the "Dogs" of Wall Street. The "Style Select
Series" is a group of mutual funds which are each managed by three
industry-recognized fund managers. The "Dogs" of Wall Street fund contains 30
large capitalization value stocks which are selected by strict criteria. Sales
of these products totaled $611.1 million in 1998, compared with $267.8 million
in 1997, reflecting the addition of five new Style Select funds, which more than
doubled the number of Style Select funds to nine, and generally favorable market
conditions. Redemptions of mutual funds, excluding redemptions of money market
accounts, amounted to $402.5 million in 1998, $412.8 million in 1997 and $379.9
million in 1996, which represent 17.5%, 22.0% and 21.4%, respectively, of
average mutual fund assets.
 
GENERAL AND ADMINISTRATIVE EXPENSES totaled $96.1 million in 1998, compared with
$98.8 million in 1997 and $81.6 million in 1996. General and administrative
expenses remain closely controlled through a company-wide cost containment
program and continue to represent less than 1% of average total assets.
 
AMORTIZATION OF DEFERRED ACQUISITION COSTS totaled $72.7 million in 1998,
compared with $66.9 million in 1997 and $57.5 million in 1996. The increases in
amortization were primarily due to additional fixed and variable annuity and
mutual fund sales and the subsequent amortization of related deferred
commissions and other direct selling costs.
 
ANNUAL COMMISSIONS represent renewal commissions paid quarterly in arrears to
maintain the persistency of certain of the Company's variable annuity contracts.
Substantially all of the Company's currently available variable annuity products
allow for an annual commission payment option in return for a lower immediate
commission. Annual commissions totaled $18.2 million in 1998, $9.0 million in
1997 and $4.6 million in 1996. The increases in annual commissions since 1996
reflect increased sales of annuities that offer this commission option and
gradual expiration of the initial fifteen-month periods before such payments
begin. The Company estimates that approximately 50% of the average balances of
its variable annuity products is currently subject to such annual commissions.
Based on current sales, this percentage is expected to increase in future
periods.
 
                                       21
<PAGE>   30
 
INCOME TAX EXPENSE totaled $71.1 million in 1998, compared with $31.2 million in
1997 and $24.3 million in 1996, representing effective tax rates of 34% in 1998,
33% in 1997 and 35% in 1996.
 
FINANCIAL CONDITION AND LIQUIDITY
 
SHAREHOLDER'S EQUITY increased 13.5% to $652.7 million at September 30, 1998
from $575.2 million at September 30, 1997, primarily due to $138.6 million of
net income recorded in 1998, which was partially offset by $51.2 million of
dividends paid in April 1998 and a $10.0 million decrease in net unrealized
gains on debt and equity securities available for sale.
 
INVESTED ASSETS at September 30, 1998 totaled $2.73 billion, compared with $2.61
billion at September 30, 1997. The Company manages most of its invested assets
internally. The Company's general investment philosophy is to hold fixed-rate
assets for long-term investment. Thus, it does not have a trading portfolio.
However, the Company has determined that all of its portfolio of bonds, notes
and redeemable preferred stocks (the "Bond Portfolio") is available to be sold
in response to changes in market interest rates, changes in relative value of
asset sectors and individual securities, changes in prepayment risk, changes in
the credit quality outlook for certain securities, and the Company's need for
liquidity and other similar factors.
 
THE BOND PORTFOLIO, which constitutes 71% of the Company's total investment
portfolio, had an aggregate fair value that exceeded its amortized cost by $19.9
million at September 30, 1998, compared with an excess of $43.7 million at
September 30, 1997. The decline in the unrealized gain of the Bond Portfolio in
1998 was due to changes in market value of portions of the non-investment-grade
portfolio.
 
At September 30, 1998, the Bond Portfolio (excluding $6.9 million of redeemable
preferred stocks) included $1.90 billion of bonds rated by Standard & Poor's
Corporation ("S&P"), Moody's Investors Service ("Moody's"), Duff & Phelps Credit
Rating Co. ("DCR"), Fitch Investors Service, L.P. ("Fitch") or the National
Association of Insurance Commissioners ("NAIC"), and $53.6 million of bonds
rated by the Company pursuant to statutory ratings guidelines established by the
NAIC. At September 30, 1998, approximately $1.78 billion of the Bond Portfolio
was investment grade, including $672.1 million of U.S. government/agency
securities and mortgage-backed securities ("MBSs").
 
At September 30, 1998, the Bond Portfolio included $167.6 million of bonds that
were not investment grade. These non-investment-grade bonds accounted for 1.2%
of the Company's total assets and 6.1% of its invested assets.
 
Non-investment-grade securities generally provide higher yields and involve
greater risks than investment-grade securities because their issuers typically
are more highly leveraged and more vulnerable to adverse economic conditions
than investment-grade issuers. In addition, the trading market for these
securities is usually more limited than for investment-grade securities. The
Company had no material concentrations of non-investment-grade securities at
September 30, 1998.
 
The table on the next page summarizes the Company's rated bonds by rating
classification as of September 30, 1998.
 
                                       22
<PAGE>   31
 
                      RATED BONDS BY RATING CLASSIFICATION
                             (DOLLARS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                       ISSUES NOT RATED BY S&P/MOODY'S/
      ISSUES RATED BY S&P/MOODY'S/DCR/FITCH              DCR/FITCH, BY NAIC CATEGORY                        TOTAL
- --------------------------------------------------    ----------------------------------    --------------------------------------
     S&P/(MOODY'S)/                     ESTIMATED       NAIC                   ESTIMATED      TOTAL       ESTIMATED     PERCENT OF
     [DCR]/HFITCHJ        AMORTIZED        FAIR       CATEGORY    AMORTIZED      FAIR       AMORTIZED        FAIR        INVESTED
      CATEGORY(1)            COST         VALUE         (2)         COST         VALUE         COST         VALUE         ASSETS
<S>                       <C>           <C>           <C>         <C>          <C>          <C>           <C>           <C>
- ----------------------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------------------
AAA+ to A-
  (Aaa to A3)
  [AAA to A-]
  HAAA to A-J...........  $ 999,052     $1,025,861       1        $180,548     $192,187     $1,179,600    $1,218,048      44.54%
BBB+ to BBB-
  (Baal to Baa3)
  [BBB+ to BBB-]
  HBBB+ to BBB-J........    420,087        418,723       2         145,025      143,532       565,112        562,255      20.56
BB+ to BB-
  (Ba1 to Ba3)
  [BB+ to BB-]
  HBB+ to BB-J..........     43,156         39,179       3          10,181        9,917        53,337         49,096       1.80
B+ to B-
  (B1 to B3)
  [B+ to B-]
  HB+ to B-J............    113,376        102,375       4          12,954       12,065       126,330        114,440       4.18
CCC+ to C
  (Caa to C)
  [CCC]
  HCCC+ to C-J..........        760            655       5           3,500        3,274         4,260          3,929       0.14
C1 to D
  [DD]
  HDJ...................          0              0       6              99           99            99             99         --
                          ----------    ----------                --------     --------     ----------    ----------
Total rated issues......  $1,576,431    $1,586,793                $352,307     $361,074     $1,928,738    $1,947,867
                          ==========    ==========                ========     ========     ==========    ==========
</TABLE>
 
(1) S&P and Fitch rate debt securities in rating categories ranging from AAA
    (the highest) to D (in payment default). A plus (+) or minus (-) indicates
    the debt's relative standing within the rating category. A security rated
    BBB- or higher is considered investment grade. Moody's rates debt securities
    in rating categories ranging from Aaa (the highest) to C (extremely poor
    prospects of ever attaining any real investment standing). The number 1, 2
    or 3 (with 1 the highest and 3 the lowest) indicates the debt's relative
    standing within the rating category. A security rated Baa3 or higher is
    considered investment grade. DCR rates debt securities in rating categories
    ranging from AAA (the highest) to DD (in payment default). A plus (+) or
    minus (-) indicates the debt's relative standing within the rating category.
    A security rated BBB- or higher is considered investment grade. Issues are
    categorized based on the highest of the S&P, Moody's, DCR and Fitch ratings
    if rated by multiple agencies.
(2) Bonds and short-term promissory instruments are divided into six quality
    categories for NAIC rating purposes, ranging from 1 (highest) to 5 (lowest)
    for nondefaulted bonds plus one category, 6, for bonds in or near default.
    These six categories correspond with the S&P/Moody's/DCR/Fitch rating groups
    listed above, with categories 1 and 2 considered investment grade. The NAIC
    categories include $53.6 million of assets that were rated by the Company
    pursuant to applicable NAIC rating guidelines.
 
SENIOR SECURED LOANS ("Secured Loans") are included in the Bond Portfolio and
aggregated $186.6 million at September 30, 1998. Secured Loans are senior to
subordinated debt and equity, and are secured by assets of the issuer. At
September 30, 1998, Secured Loans consisted of $71.6 million of publicly traded
securities and $115.0 million of privately traded securities. These Secured
Loans are composed of loans to 62 borrowers spanning 21 industries, with 32% of
these assets concentrated in financial institutions. No other industry
concentration constituted more than 9% of these assets.
 
While the trading market for the Company's privately traded Secured Loans is
more limited than for publicly traded issues, management believes that
participation in these transactions has enabled the Company to improve its
investment yield. As a result of restrictive financial covenants, these Secured
Loans involve greater risk of technical default than do publicly traded
investment-grade securities. However, management believes that the risk of loss
upon default for these Secured Loans is mitigated by such financial covenants
and the collateral values underlying the Secured Loans. The Company's Secured
Loans are rated by S&P, Moody's, DCR, Fitch, the NAIC or by the Company,
pursuant to comparable statutory ratings guidelines established by the NAIC.
 
MORTGAGE LOANS aggregated $391.4 million at September 30, 1998 and consisted of
133 commercial first mortgage loans with an average loan balance of
approximately $2.9 million, collateralized by properties located in 29 states.
Approximately 21% of this portfolio was multifamily residential, 17% was office,
14% was manufactured housing, 13% was industrial, 11% was hotels and 24% was
other types. At September 30, 1998, approximately 21% and 14% of this portfolio
were secured by properties located in California and New York, respectively, and
no more than 8% of this portfolio was secured by properties located in any other
single state. At September 30, 1998, there were three mortgage loans with
outstanding balances of $10 million or more, which loans collectively aggregated
approximately 11% of this portfolio. At September 30, 1998, approximately 30% of
the mortgage loan portfolio consisted of loans with balloon payments due before
October 1, 2001. During 1998, 1997 and 1996, loans
 
                                       23
<PAGE>   32
 
delinquent by more than 90 days, foreclosed loans and restructured loans have
not been significant in relation to the total mortgage loan portfolio.
 
At September 30, 1998, approximately 11% of the mortgage loans were seasoned
loans underwritten to the Company's standards and purchased at or near par from
other financial institutions. Such loans generally have higher average interest
rates than loans that could be originated today. The balance of the mortgage
loan portfolio has been originated by the Company under strict underwriting
standards. Commercial mortgage loans on properties such as offices, hotels and
shopping centers generally represent a higher level of risk than do mortgage
loans secured by multifamily residences. This greater risk is due to several
factors, including the larger size of such loans and the more immediate effects
of general economic conditions on these commercial property types. However, due
to the seasoned nature of the Company's mortgage loan portfolio, its emphasis on
multifamily loans and its strict underwriting standards, the Company believes
that it has prudently managed the risk attributable to its mortgage loan
portfolio while maintaining attractive yields.
 
OTHER INVESTED ASSETS aggregated $30.6 million at September 30, 1998, including
$15.0 million of collateralized bond obligations and collateralized mortgage
obligation residuals, $11.2 million of policy loans and $4.4 million of
investments in limited partnerships. The Company's limited partnership
interests, accounted for by using the cost method of accounting, are invested
primarily in a combination of debt and equity securities.
 
ASSET-LIABILITY MATCHING is utilized by the Company to minimize the risks of
interest rate fluctuations and disintermediation. The Company believes that its
fixed-rate liabilities should be backed by a portfolio principally composed of
fixed-rate investments that generate predictable rates of return. The Company
does not have a specific target rate of return. Instead, its rates of return
vary over time depending on the current interest rate environment, the slope of
the yield curve, the spread at which fixed-rate investments are priced over the
yield curve, and general economic conditions. Its portfolio strategy is
constructed with a view to achieve adequate risk-adjusted returns consistent
with its investment objectives of effective asset-liability matching, liquidity
and safety. The Company's fixed-rate products incorporate surrender charges or
other restrictions in order to encourage persistency. Approximately 77% of the
Company's fixed annuity and GIC reserves had surrender penalties or other
restrictions at September 30, 1998.
 
As part of its asset-liability matching discipline, the Company conducts
detailed computer simulations that model its fixed-rate assets and liabilities
under commonly used stress-test interest rate scenarios. With the results of
these computer simulations, the Company can measure the potential gain or loss
in fair value of its interest-rate sensitive instruments and seek to protect its
economic value and achieve a predictable spread between what it earns on its
invested assets and what it pays on its liabilities by designing its fixed-rate
products and conducting its investment operations to closely match the duration
of the fixed-rate assets to that of its fixed-rate liabilities. The Company's
fixed-rate assets include: cash and short-term investments; bonds, notes and
redeemable preferred stocks; mortgage loans; and investments in limited
partnerships that invest primarily in fixed-rate securities and are accounted
for by using the cost method. At September 30, 1998, these assets had an
aggregate fair value of $2.69 billion with a duration of 3.6. The Company's
fixed-rate liabilities include fixed annuities, subordinated notes and GICs. At
September 30, 1998, these liabilities had an aggregate fair value (determined by
discounting future contractual cash flows by related market rates of interest)
of $2.41 billion with a duration of 1.4. The Company's potential exposure due to
a 10% increase in prevailing interest rates from their September 30, 1998 levels
is a loss of $26.7 million in fair value of its fixed-rate assets that is not
offset by a decrease in the fair value of its fixed-rate liabilities. Because
the Company actively manages its assets and liabilities and has strategies in
place to minimize its exposure to loss as interest rate changes occur, it
expects that actual losses would be less than the estimated potential loss.
 
Duration is a common option-adjusted measure for the price sensitivity of a
fixed-maturity portfolio to changes in interest rates. It measures the
approximate percentage change in the market value of a portfolio if interest
rates change by 100 basis points, recognizing the changes in cash flows
resulting from embedded options such as policy surrenders, investment
prepayments and bond calls. It also incorporates the assumption that the Company
will continue to utilize its existing strategies of pricing its fixed annuity
and GIC products, allocating its available cash flow amongst its various
investment portfolio sectors and maintaining sufficient levels of liquidity.
Because the calculation of duration involves estimation and incorporates
assumptions, potential changes in portfolio value indicated by the portfolio's
duration will likely be different from the actual changes experienced under
given interest rate scenarios, and the differences may be material.
 
As a component of its asset and liability management strategy, the Company
utilizes interest rate swap agreements ("Swap Agreements") to match assets more
closely to liabilities. Swap Agreements are agreements to exchange with a
counterparty interest rate payments of differing character (for example,
variable-rate payments exchanged for fixed-rate payments) based on an underlying
principal balance (notional principal) to hedge against interest rate changes.
The Company typically utilizes Swap Agreements to create a hedge that
effectively converts floating-rate assets and liabilities into fixed-rate
instruments. At September 30, 1998, the Company had one outstanding Swap
Agreement with a notional principal amount of $21.5 million. This agreement
matures in December 2024.
 
                                       24
<PAGE>   33
 
The Company also seeks to provide liquidity from time to time by using reverse
repurchase agreements ("Reverse Repos") and by investing in MBSs. It also seeks
to enhance its spread income by using Reverse Repos. Reverse Repos involve a
sale of securities and an agreement to repurchase the same securities at a later
date at an agreed upon price and are generally over-collateralized. MBSs are
generally investment-grade securities collateralized by large pools of mortgage
loans. MBSs generally pay principal and interest monthly. The amount of
principal and interest payments may fluctuate as a result of prepayments of the
underlying mortgage loans.
 
There are risks associated with some of the techniques the Company uses to
provide liquidity, enhance its spread income and match its assets and
liabilities. The primary risk associated with the Company's Reverse Repos and
Swap Agreements is counterparty risk. The Company believes, however, that the
counterparties to its Reverse Repos and Swap Agreements are financially
responsible and that the counterparty risk associated with those transactions is
minimal. It is the Company's policy that these agreements are entered into with
counterparties who have a debt rating of A/A2 or better from both S&P and
Moody's. The Company continually monitors its credit exposure with respect to
these agreements. In addition to counterparty risk, Swap Agreements also have
interest rate risk. However, the Company's Swap Agreements typically hedge
variable-rate assets or liabilities, and interest rate fluctuations that
adversely affect the net cash received or paid under the terms of a Swap
Agreement would be offset by increased interest income earned on the
variable-rate assets or reduced interest expense paid on the variable-rate
liabilities. The primary risk associated with MBSs is that a changing interest
rate environment might cause prepayment of the underlying obligations at speeds
slower or faster than anticipated at the time of their purchase. As part of its
decision to purchase an MBS, the Company assesses the risk of prepayment by
analyzing the security's projected performance over an array of interest-rate
scenarios. Once an MBS is purchased, the Company monitors its actual prepayment
experience monthly to reassess the relative attractiveness of the security with
the intent to maximize total return.
 
INVESTED ASSETS EVALUATION is routinely conducted by the Company. Management
identifies monthly those investments that require additional monitoring and
carefully reviews the carrying values of such investments at least quarterly to
determine whether specific investments should be placed on a nonaccrual basis
and to determine declines in value that may be other than temporary. In making
these reviews for bonds, management principally considers the adequacy of any
collateral, compliance with contractual covenants, the borrower's recent
financial performance, news reports and other externally generated information
concerning the creditor's affairs. In the case of publicly traded bonds,
management also considers market value quotations, if available. For mortgage
loans, management generally considers information concerning the mortgaged
property and, among other things, factors impacting the current and expected
payment status of the loan and, if available, the current fair value of the
underlying collateral. For investments in partnerships, management reviews the
financial statements and other information provided by the general partners.
 
The carrying values of investments that are determined to have declines in value
that are other than temporary are reduced to net realizable value and, in the
case of bonds, no further accruals of interest are made. The provisions for
impairment on mortgage loans are based on losses expected by management to be
realized on transfers of mortgage loans to real estate, on the disposition and
settlement of mortgage loans and on mortgage loans that management believes may
not be collectible in full. Accrual of interest is suspended when principal and
interest payments on mortgage loans are past due more than 90 days.
 
DEFAULTED INVESTMENTS, comprising all investments that are in default as to the
payment of principal or interest, totaled $0.9 million of mortgage loans at
September 30, 1998, and constituted less than 0.1% of total invested assets. At
September 30, 1997, defaulted investments totaled $1.4 million, including $0.5
million of bonds and notes and $0.9 million of mortgage loans, and constituted
less than 0.1% of total invested assets.
 
SOURCES OF LIQUIDITY are readily available to the Company in the form of the
Company's existing portfolio of cash and short-term investments, Reverse Repo
capacity on invested assets and, if required, proceeds from invested asset
sales. At September 30, 1998, approximately $1.50 billion of the Company's Bond
Portfolio had an aggregate unrealized gain of $59.2 million, while approximately
$456.3 million of the Bond Portfolio had an aggregate unrealized loss of $39.3
million. In addition, the Company's investment portfolio currently provides
approximately $23.6 million of monthly cash flow from scheduled principal and
interest payments. Historically, cash flows from operations and from the sale of
the Company's annuity and GIC products have been more than sufficient in amount
to satisfy the Company's liquidity needs.
 
Management is aware that prevailing market interest rates may shift
significantly and has strategies in place to manage either an increase or
decrease in prevailing rates. In a rising interest rate environment, the
Company's average cost of funds would increase over time as it prices its new
and renewing annuities and GICs to maintain a generally competitive market rate.
Management would seek to place new funds in investments that were matched in
duration to, and higher yielding than, the liabilities assumed. The Company
believes that liquidity to fund withdrawals would be available through incoming
cash flow, the sale of short-term or floating-rate instruments or Reverse Repos
on the Company's substantial MBS segment of the Bond Portfolio,
 
                                       25
<PAGE>   34
 
thereby avoiding the sale of fixed-rate assets in an unfavorable bond market.
 
In a declining rate environment, the Company's cost of funds would decrease over
time, reflecting lower interest crediting rates on its fixed annuities and GICs.
Should increased liquidity be required for withdrawals, the Company believes
that a significant portion of its investments could be sold without adverse
consequences in light of the general strengthening that would be expected in the
bond market.
 
PROPERTIES
 
The Company's executive offices and its principal office are in leased premises
at 1 SunAmerica Center, Los Angeles, California. The Company, through an
affiliate, also leases office space in Woodland Hills, California. The Company's
broker-dealer and asset management subsidiaries lease offices in New York, New
York.
 
The Company believes that such properties, including the equipment located
therein, are suitable and adequate to meet the requirements of its businesses.
 
                                       26
<PAGE>   35
 
DIRECTORS AND OFFICERS
 
The directors and principal officers of Anchor National as of December 22, 1998
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).
<TABLE>
<CAPTION>
 
                                                                              YEAR
                                                PRESENT                      ASSUMED
         NAME            AGE                  POSITION(S)                  POSITION(S)
- --------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------
<S>                      <C>   <C>                                         <C>
Eli Broad*               65    Chairman, Chief Executive                      1994
                               Officer and President of the Company
                               Chairman, Chief Executive Officer and          1986
                               President of SunAmerica Inc. ("SAI")
- --------------------------------------------------------------------------------------
Jay S. Wintrob*          41    Executive Vice President of the Company        1991
                               Vice Chairman and Chief Operating Officer      1998
                               of SAI
- --------------------------------------------------------------------------------------
James R. Belardi*        41    Senior Vice President of the Company           1992
                               Executive Vice President of SAI                1995
- --------------------------------------------------------------------------------------
Jana Waring Greer*       46    Senior Vice President of the Company and       1991
                               SAI
- --------------------------------------------------------------------------------------
Peter McMillan, III      41    Director
- --------------------------------------------------------------------------------------
Scott L. Robinson*       52    Senior Vice President of the Company           1991
                               Senior Vice President and Controller of        1991
                               SAI
- --------------------------------------------------------------------------------------
Susan L. Harris*         41    Senior Vice President and Secretary of the     1994
                               Company
                               Senior Vice President, General Counsel and     1995
                               Secretary of SAI
- --------------------------------------------------------------------------------------
James Rowan*             36    Senior Vice President of the Company           1996
                               Senior Vice President of SAI                   1995
- --------------------------------------------------------------------------------------
N. Scott Gillis          45    Senior Vice President and Controller of        1994
                               the Company
                               Vice President of SAI                          1997
- --------------------------------------------------------------------------------------
Edwin R. Reoliquio       41    Senior Vice President and Chief Actuary of     1995
                               the Company
- --------------------------------------------------------------------------------------
Victor E. Akin           34    Senior Vice President of the Company           1996
- --------------------------------------------------------------------------------------
Scott H. Richland        36    Vice President of the Company                  1994
                               Senior Vice President of SAI                   1997
- --------------------------------------------------------------------------------------
David R. Bechtel         31    Vice President and Treasurer of the            1998
                               Company
                               Vice President and Treasurer of SAI            1998
- --------------------------------------------------------------------------------------
J. Franklin Grey         46    Vice President of the Company                  1994
- --------------------------------------------------------------------------------------
Keith B. Jones           47    Vice President of the Company                  1992
- --------------------------------------------------------------------------------------
Michael L. Lindquist     45    Vice President of the Company                  1993
- --------------------------------------------------------------------------------------
Edward P. Nolan, Jr.     49    Vice President of the Company                  1993
- --------------------------------------------------------------------------------------
Gregory M. Outcalt       36    Vice President of the Company                  1993
- --------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------
 
<CAPTION>
                                          OTHER POSITIONS AND
                                            OTHER BUSINESS
                                           EXPERIENCE WITHIN
         NAME                              LAST FIVE YEARS**                     FROM-TO
- --------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------
<S>                      <C>                                                    <C>
Eli Broad*               Cofounded SAI in 1957
- --------------------------------------------------------------------------------------
Jay S. Wintrob*          (Joined SAI in 1987)
- --------------------------------------------------------------------------------------
James R. Belardi*        (Joined SAI in 1986)
- --------------------------------------------------------------------------------------
Jana Waring Greer*       (Joined SAI in 1974)
- --------------------------------------------------------------------------------------
Peter McMillan, III      Executive Vice President and Chief Investment Officer  1994-1998
                         of SunAmerica Investments, Inc. (DE)
                         Senior Vice President, SunAmerica Investments, Inc.    1989-1994
                         (DE)
- --------------------------------------------------------------------------------------
Scott L. Robinson*       (Joined SAI in 1978)
- --------------------------------------------------------------------------------------
Susan L. Harris*         Vice President, General Counsel-Corporate Affairs and  1994-1995
                         Secretary of SAI
                         Vice President, Associate General Counsel and          1989-1994
                         Secretary of SAI (Joined SAI in 1985)
- --------------------------------------------------------------------------------------
James Rowan*             Vice President of SAI                                  1993-1995
                         (Joined SAI in 1992)
- --------------------------------------------------------------------------------------
N. Scott Gillis          Vice President and Controller, SunAmerica Life         1989-1994
                         Companies ("SLC")
                         (Joined SAI in 1985)
- --------------------------------------------------------------------------------------
Edwin R. Reoliquio       Vice President and Actuary, SLC                        1990-1995
- --------------------------------------------------------------------------------------
Victor E. Akin           Vice President, SLC                                    1995-1996
                         Director, Product Development, SLC                     1994-1995
                         Manager, Business Development, SLC                     1993-1994
- --------------------------------------------------------------------------------------
Scott H. Richland        Senior Vice President and Treasurer of SAI             1997-1998
                         Vice President and Treasurer of SAI                    1995-1997
                         Vice President and Assistant Treasurer of SAI          1994-1995
                         Assistant Treasurer of SAI                             1993-1994
                         (Joined SAI in 1990)
- --------------------------------------------------------------------------------------
David R. Bechtel         Vice President, Deutsche Morgan Grenfell, Inc.         1996-1998
                         Associate, UBS Securities LLC                          1995-1996
                         Associate, Wachtell Lipton Rosen & Katz                     1994
                         Associate, Wells Fargo Nikko Investment Advisers       1993-1994
- --------------------------------------------------------------------------------------
J. Franklin Grey         Director, Institutional Marketing Capital Holding      1991-1994
                         Corp. (Providian)
- --------------------------------------------------------------------------------------
Keith B. Jones           (Joined SAI in 1986)
- --------------------------------------------------------------------------------------
Michael L. Lindquist     (Joined SAI in 1983)
- --------------------------------------------------------------------------------------
Edward P. Nolan, Jr.     (Joined SAI in 1989)
- --------------------------------------------------------------------------------------
Gregory M. Outcalt       (Joined SAI in 1986)
- --------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------
</TABLE>
 
 * Also serves as director.
 
** Unless otherwise indicated, officers and positions are with SunAmerica, Inc.
 
                                       27
<PAGE>   36
 
EXECUTIVE COMPENSATION
 
All of the executive officers of the Company also serve as employees of
SunAmerica Inc. or its affiliates and receive no compensation directly from the
Company. Some of the officers also serve as officers of other companies
affiliated with the Company. Allocations have been made as to each individual's
time devoted to his or her duties as an executive officer of the Company.
 
The following table shows the cash compensation paid or earned, based on these
allocations, to the chief executive officer and top four executive officers of
the Company whose allocated compensation exceeds $100,000 for services rendered
in all capacities to the Company during 1998:
 
<TABLE>
<CAPTION>
- --------------------------------------------------------------------
                                 CAPACITIES             ALLOCATED
NAME OF INDIVIDUAL OR             IN WHICH                CASH
   NUMBER IN GROUP                 SERVED             COMPENSATION
- ----------------------           ----------          ---------------
- --------------------------------------------------------------------
<S>                      <C>                         <C>
 Eli Broad               Chairman, Chief Executive     $1,482,778
                         Officer and President
 Jay S. Wintrob          Executive Vice                   857,524
                         President
 Jana Waring Greer       Senior Vice                      775,001
                         President
 Peter McMillan          Director                         421,457
 James R. Belardi        Senior Vice                      408,949
                         President
- --------------------------------------------------------------------
</TABLE>
 
Directors of the Company who are also employees of SunAmerica Inc. or its
affiliates receive no compensation in addition to their compensation as
employees of SunAmerica Inc. or its affiliates.
 
SECURITY OWNERSHIP OF OWNERS AND MANAGEMENT
 
No shares of the Company are owned by any executive officer or director. The
Company is an indirect wholly owned subsidiary of SunAmerica Inc. Except for Mr.
Broad, the percentage of shares of SunAmerica Inc. beneficially owned by any
director does not exceed one percent of the class outstanding. At November 30,
1998, Mr. Broad was the beneficial owner of 13,015,360 shares of Common Stock of
SunAmerica Inc. (approximately 6.4% of the class outstanding) and 13,340,591
shares of Nontransferable Class B Common Stock of SunAmerica Inc. (approximately
82% of the class outstanding). Of the Common Stock, 1,053,738 shares represent
restricted shares granted under the Company's employee stock plans as to which
Mr. Broad has no investment power; and 9,283,050 shares represent employee stock
options held by Mr. Broad which are or will become exercisable on or before
January 30, 1999 and as to which he has no voting or investment power. Of the
Nontransferable Class B Stock, 12,284,360 shares are held directly by Mr. Broad;
and 1,056,231 shares are registered in the name of a corporation as to which Mr.
Broad exercises sole voting and dispositive powers. At November 30, 1998, all
directors and officers as a group beneficially owned 16,027,507 shares of Common
Stock (approximately 8% of the class outstanding) and 13,340,591 shares of
Nontransferable Class B Common Stock (approximately 82% of the class
outstanding).
 
REGULATION
 
Anchor National is subject to regulation and supervision by the insurance
regulatory agencies of the states in which it is authorized to transact
business. State insurance laws establish supervisory agencies with broad
administrative and supervisory powers. Principal among these powers are granting
and revoking licenses to transact business, regulating marketing and other trade
practices, operating guaranty associations, licensing agents, approving policy
forms, regulating certain premium rates, regulating insurance holding company
systems, establishing reserve requirements, prescribing the form and content of
required financial statements and reports, performing financial, market conduct
and other examinations, determining the reasonableness and adequacy of statutory
capital and surplus, defining acceptable accounting principles, regulating the
type, valuation and amount of investments permitted, and limiting the amount of
dividends that can be paid and the size of transactions that can be consummated
without first obtaining regulatory approval.
 
During the last decade, the insurance regulatory framework has been placed under
increased scrutiny by various states, the federal government and the NAIC.
Various states have considered or enacted legislation that changes, and in many
cases increases, the states' authority to regulate insurance companies.
Legislation has been introduced from time to time in Congress that could result
in the federal government assuming some role in the regulation of insurance
companies or allowing combinations between insurance companies, banks and other
entities. In recent years, the NAIC has approved and recommended to the states
for adoption and implementation several regulatory initiatives designed to
reduce the risk of insurance company insolvencies and market conduct violations.
These initiatives include investment reserve requirements, risk-based capital
standards, codification of insurance accounting principles, new investment
standards and restrictions on an insurance company's ability to pay dividends to
its stockholders. The NAIC is also currently developing model laws relating to
product design and illustrations for annuity products. Current proposals are
still being debated and we are monitoring developments in this area and the
effects any changes would have on us.
 
SunAmerica Asset Management is registered with the SEC as a registered
investment advisor under the Investment Advisors Act of 1940. The mutual funds
that it markets are subject to regulation under the Investment Company Act of
1940. SunAmerica Asset Management and the mutual funds are subject to regulation
and examination by the SEC. In
 
                                       28
<PAGE>   37
 
addition, variable annuities and the related separate accounts of the Company
are subject to regulation by the SEC under the Securities Act of 1933 and the
Investment Company Act of 1940.
 
Our broker-dealer subsidiary is subject to regulation and supervision by the
states in which it transacts business, as well as by the SEC and the National
Association of Securities Dealers ("NASD"). The NASD has broad administrative
and supervisory powers relative to all aspects of business and may examine the
subsidiary's business and accounts at any time.
 
INDEPENDENT ACCOUNTANTS
 
The financial statements of Anchor National as of September 30, 1998 and 1997
and for each of the three years in the period ended September 30, 1998 included
in this prospectus have been so included in reliance on the report of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
                              TABLE OF CONTENTS OF
                      STATEMENT OF ADDITIONAL INFORMATION
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
Additional information concerning the operations of the separate account is
contained in a Statement of Additional Information ("SAI"), which is available
without charge upon written request addressed to us at our Annuity Service
Center, P.O. Box 54299, Los Angeles, California 90054-0299 or by calling
(800)445-SUN2. The contents of the SAI are tabulated below.
 
<TABLE>
<S>                                               <C>
Separate Account..............................      3
General Account...............................      3
Performance Data..............................      4
Income Payments...............................      8
Annuity Unit Values...........................      9
Taxes.........................................     11
Distribution of Contracts.....................     15
Financial Statements..........................     15
</TABLE>
 
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
                              FINANCIAL STATEMENTS
- ----------------------------------------------------------------
- ----------------------------------------------------------------
 
The financial statements of Anchor National which are included in this
prospectus should be considered only as bearing on the ability of the Company to
meet its obligations with respect to amounts allocated to the General Account
and with respect to the death benefit and the Company's assumption of the
mortality and expense risks and the risk that the withdrawal charge will be
insufficient to cover the cost of distributing the contracts. They should not be
considered as bearing on the investment performance of the Underlying Fund
shares held in the Variable Portfolios of the separate account. The value of the
interests of owners, participants, Annuitants, payees and Beneficiaries under
the variable portion of the contracts is affected primarily by the investment
results of the Underlying Funds.
 
                                       29
<PAGE>   38
 
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
To the Board of Directors and Shareholder of
Anchor National Life Insurance Company
 
In our opinion, the accompanying consolidated balance sheet and the related
consolidated income statement and statement of cash flows present fairly, in all
material respects, the financial position of Anchor National Life Insurance
Company and its subsidiaries (the "Company")at September 30, 1998 and 1997, and
the results of their operations and their cash flows for each of the three years
in the period ended September 30, 1998, in conformity with generally accepted
accounting principles. These financial statements are the responsibility of the
Company's management; our responsibility is to express an opinion on these
financial statements based on our audits. We conducted our audits of these
statements in accordance with generally accepted auditing standards which
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, assessing the accounting principles
used and significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for the opinion expressed above.
 
PricewaterhouseCoopers LLP
Los Angeles, California
November 9, 1998
 
                                       30
<PAGE>   39
 
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
                           CONSOLIDATED BALANCE SHEET
 
<TABLE>
<CAPTION>
                                                                       AT SEPTEMBER 30,
                                                              ----------------------------------
                                                                   1998               1997
                                                              ---------------    ---------------
<S>                                                           <C>                <C>
ASSETS
Investments:
  Cash and short-term investments...........................  $   333,735,000    $   113,580,000
  Bonds, notes and redeemable preferred stocks available for
     sale, at fair value (amortized cost: 1998,
     $1,934,863,000; 1997, $1,942,485,000)..................    1,954,754,000      1,986,194,000
  Mortgage loans............................................      391,448,000        339,530,000
  Common stocks available for sale, at fair value (cost:
     1998, $115,000; 1997, $271,000)........................          169,000          1,275,000
  Real estate...............................................       24,000,000         24,000,000
  Other invested assets.....................................       30,636,000        143,722,000
                                                              ---------------    ---------------
          Total investments.................................    2,734,742,000      2,608,301,000
Variable annuity assets held in separate accounts...........   11,133,569,000      9,343,200,000
Accrued investment income...................................       26,408,000         21,759,000
Deferred acquisition costs..................................      539,850,000        536,155,000
Income taxes currently receivable...........................        5,869,000                 --
Other assets................................................       85,926,000         61,524,000
                                                              ---------------    ---------------
          TOTAL ASSETS......................................  $14,526,364,000    $12,570,939,000
                                                              ===============    ===============
 
LIABILITIES AND SHAREHOLDER'S EQUITY
Reserves, payables and accrued liabilities:
  Reserves for fixed annuity contracts......................  $ 2,189,272,000    $ 2,098,803,000
  Reserves for guaranteed investment contracts..............      282,267,000        295,175,000
  Payable to brokers for purchases of securities............       27,053,000            263,000
  Income taxes currently payable............................               --         32,265,000
  Other liabilities.........................................      106,594,000        122,728,000
                                                              ---------------    ---------------
          Total reserves, payables and accrued
           liabilities......................................    2,605,186,000      2,549,234,000
                                                              ---------------    ---------------
Variable annuity liabilities related to separate accounts...   11,133,569,000      9,343,200,000
                                                              ---------------    ---------------
Subordinated notes payable to Parent........................       39,182,000         36,240,000
                                                              ---------------    ---------------
Deferred income taxes.......................................       95,758,000         67,047,000
                                                              ---------------    ---------------
Shareholder's equity:
  Common Stock..............................................        3,511,000          3,511,000
  Additional paid-in capital................................      308,674,000        308,674,000
  Retained earnings.........................................      332,069,000        244,628,000
  Net unrealized gains on debt and equity securities
     available for sale.....................................        8,415,000         18,405,000
                                                              ---------------    ---------------
          Total shareholder's equity........................      652,669,000        575,218,000
                                                              ---------------    ---------------
          TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY........  $14,526,364,000    $12,570,939,000
                                                              ===============    ===============
</TABLE>
 
                            See accompanying notes.
 
                                       31
<PAGE>   40
 
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
                         CONSOLIDATED INCOME STATEMENT
 
<TABLE>
<CAPTION>
                                                                         YEARS ENDED SEPTEMBER 30,
                                                              -----------------------------------------------
                                                                  1998             1997             1996
                                                              -------------    -------------    -------------
<S>                                                           <C>              <C>              <C>
Investment income...........................................  $ 221,966,000    $ 210,759,000    $ 164,631,000
                                                              -------------    -------------    -------------
Interest expense on:
  Fixed annuity contracts...................................   (112,695,000)    (109,217,000)     (82,690,000)
  Guaranteed investment contracts...........................    (17,787,000)     (22,650,000)     (19,974,000)
  Senior indebtedness.......................................     (1,498,000)      (2,549,000)      (2,568,000)
  Subordinated notes payable to Parent......................     (3,114,000)      (3,142,000)      (2,556,000)
                                                              -------------    -------------    -------------
          Total interest expense............................   (135,094,000)    (137,558,000)    (107,788,000)
                                                              -------------    -------------    -------------
NET INVESTMENT INCOME.......................................     86,872,000       73,201,000       56,843,000
                                                              -------------    -------------    -------------
NET REALIZED INVESTMENT GAINS
  (LOSSES)..................................................     19,482,000      (17,394,000)     (13,355,000)
                                                              -------------    -------------    -------------
Fee income:
  Variable annuity fees.....................................    200,867,000      139,492,000      103,970,000
  Net retained commissions..................................     48,561,000       39,143,000       31,548,000
  Asset management fees.....................................     29,592,000       25,764,000       25,413,000
  Surrender charges.........................................      7,404,000        5,529,000        5,184,000
  Other fees................................................      3,938,000        3,218,000        3,390,000
                                                              -------------    -------------    -------------
          TOTAL FEE INCOME..................................    290,362,000      213,146,000      169,505,000
                                                              -------------    -------------    -------------
GENERAL AND ADMINISTRATIVE
  EXPENSES..................................................    (96,102,000)     (98,802,000)     (81,552,000)
                                                              -------------    -------------    -------------
AMORTIZATION OF DEFERRED
  ACQUISITION COSTS.........................................    (72,713,000)     (66,879,000)     (57,520,000)
                                                              -------------    -------------    -------------
ANNUAL COMMISSIONS..........................................    (18,209,000)      (8,977,000)      (4,613,000)
                                                              -------------    -------------    -------------
PRETAX INCOME...............................................    209,692,000       94,295,000       69,308,000
Income tax expense..........................................    (71,051,000)     (31,169,000)     (24,252,000)
                                                              -------------    -------------    -------------
NET INCOME..................................................  $ 138,641,000    $  63,126,000    $  45,056,000
                                                              =============    =============    =============
</TABLE>
 
                            See accompanying notes.
 
                                       32
<PAGE>   41
 
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
                      CONSOLIDATED STATEMENT OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                            YEARS ENDED SEPTEMBER 30,
                                                              -----------------------------------------------------
                                                                   1998               1997               1996
                                                              ---------------    ---------------    ---------------
<S>                                                           <C>                <C>                <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income................................................  $   138,641,000    $    63,126,000    $    45,056,000
  Adjustments to reconcile net income to net cash provided
    by operating activities:
    Interest credited to:
      Fixed annuity contracts...............................      112,695,000        109,217,000         82,690,000
      Guaranteed investment contracts.......................       17,787,000         22,650,000         19,974,000
    Net realized investment (gains) losses..................      (19,482,000)        17,394,000         13,355,000
    Amortization (accretion) of net premiums (discounts) on
     investments............................................          447,000        (18,576,000)        (8,976,000)
    Amortization of goodwill................................        1,422,000          1,187,000          1,169,000
    Provision for deferred income taxes.....................       34,087,000        (16,024,000)        (3,351,000)
  Change in:
    Accrued investment income...............................       (4,649,000)        (2,084,000)        (5,483,000)
    Deferred acquisition costs..............................     (160,926,000)      (113,145,000)       (60,941,000)
    Other assets............................................      (19,374,000)       (14,598,000)        (8,000,000)
    Income taxes currently payable..........................      (38,134,000)        10,779,000          5,766,000
    Other liabilities.......................................       (2,248,000)        14,187,000          5,474,000
  Other, net................................................       (5,599,000)           418,000           (129,000)
                                                              ---------------    ---------------    ---------------
NET CASH PROVIDED BY OPERATING ACTIVITIES...................       54,667,000         74,531,000         86,604,000
                                                              ---------------    ---------------    ---------------
CASH FLOWS FROM FINANCING ACTIVITIES:
  Premium receipts on:
    Fixed annuity contracts.................................    1,512,994,000      1,097,937,000        741,774,000
    Guaranteed investment contracts.........................        5,619,000         55,000,000        134,967,000
  Net exchanges from the fixed accounts of variable annuity
    contracts...............................................   (1,303,790,000)      (620,367,000)      (236,705,000)
  Withdrawal payments on:
    Fixed annuity contracts.................................     (191,690,000)      (242,589,000)      (263,614,000)
    Guaranteed investment contracts.........................      (36,313,000)      (198,062,000)       (16,492,000)
  Claims and annuity payments on fixed annuity contracts....      (40,589,000)       (35,731,000)       (31,107,000)
  Net receipts from (repayments of) other short-term
    financings..............................................      (10,944,000)        34,239,000       (119,712,000)
  Net receipts from a modified coinsurance transaction......      166,631,000                 --                 --
  Capital contributions received............................               --         28,411,000         27,387,000
  Dividends paid............................................      (51,200,000)       (25,500,000)       (29,400,000)
                                                              ---------------    ---------------    ---------------
NET CASH PROVIDED BY FINANCING ACTIVITIES...................       50,718,000         93,338,000        207,098,000
                                                              ---------------    ---------------    ---------------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of:
    Bonds, notes and redeemable preferred stocks............  $(1,970,502,000)   $(2,566,211,000)   $(1,937,890,000)
    Mortgage loans..........................................     (131,386,000)      (266,771,000)       (15,000,000)
    Other investments, excluding short-term investments.....               --        (75,556,000)       (36,770,000)
  Sales of:
    Bonds, notes and redeemable preferred stocks............    1,602,079,000      2,299,063,000      1,241,928,000
    Real estate.............................................               --                 --            900,000
    Other investments, excluding short-term investments.....       42,458,000          6,421,000          4,937,000
  Redemptions and maturities of:
    Bonds, notes and redeemable preferred stocks............      424,393,000        376,847,000        288,969,000
    Mortgage loans..........................................       80,515,000         25,920,000         11,324,000
    Other investments, excluding short-term investments.....       67,213,000         23,940,000         20,749,000
                                                              ---------------    ---------------    ---------------
NET CASH PROVIDED (USED) BY INVESTING ACTIVITIES............      114,770,000       (176,347,000)      (420,853,000)
                                                              ---------------    ---------------    ---------------
NET INCREASE (DECREASE) IN CASH AND SHORT-TERM
  INVESTMENTS...............................................      220,155,000         (8,478,000)      (127,151,000)
CASH AND SHORT-TERM INVESTMENTS AT BEGINNING OF PERIOD......      113,580,000        122,058,000        249,209,000
                                                              ---------------    ---------------    ---------------
CASH AND SHORT-TERM INVESTMENTS AT END OF PERIOD............  $   333,735,000    $   113,580,000    $   122,058,000
                                                              ===============    ===============    ===============
SUPPLEMENTAL CASH FLOW INFORMATION:
  Interest paid on indebtedness.............................  $     3,912,000    $     7,032,000    $     5,982,000
                                                              ===============    ===============    ===============
  Net income taxes paid.....................................  $    74,932,000    $    36,420,000    $    22,031,000
                                                              ===============    ===============    ===============
</TABLE>
 
                            See accompanying notes.
 
                                       33
<PAGE>   42
 
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
1.  NATURE OF OPERATIONS
 
Anchor National Life Insurance Company (the "Company") is a wholly owned
indirect subsidiary of SunAmerica Inc. (the "Parent"). The Company is an
Arizona-domiciled life insurance company and conducts its business through three
segments: annuity operations, asset management operations and broker-dealer
operations. Annuity operations include the sale and administration of fixed and
variable annuities and guaranteed investment contracts. Asset management
operations, which includes the sale and management of mutual funds, is conducted
by SunAmerica Asset Management Corp. Broker-dealer operations include the sale
of securities and financial services products, and are conducted by Royal
Alliance Associates, Inc.
 
The operations of the Company are influenced by many factors, including general
economic conditions, monetary and fiscal policies of the federal government, and
policies of state and other regulatory authorities. The level of sales of the
Company's financial products is influenced by many factors, including general
market rates of interest, strength, weakness and volatility of equity markets,
and terms and conditions of competing financial products. The Company is exposed
to the typical risks normally associated with a portfolio of fixed-income
securities, namely interest rate, option, liquidity and credit risk. The Company
controls its exposure to these risks by, among other things, closely monitoring
and matching the duration of its assets and liabilities, monitoring and limiting
prepayment and extension risk in its portfolio, maintaining a large percentage
of its portfolio in highly liquid securities, and engaging in a disciplined
process of underwriting, reviewing and monitoring credit risk. The Company also
is exposed to market risk, as market volatility may result in reduced fee income
in the case of assets managed in mutual funds and held in separate accounts.
 
2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
BASIS OF PRESENTATION: The accompanying consolidated financial statements have
been prepared in accordance with generally accepted accounting principles and
include the accounts of the Company and all of its wholly owned subsidiaries.
All significant intercompany accounts and transactions are eliminated in
consolidation. Certain prior period amounts have been reclassified to conform
with the 1998 presentation.
 
The preparation of financial statements in conformity with generally accepted
accounting principles requires the use of estimates and assumptions that affect
the amounts reported in the financial statements and the accompanying notes.
Actual results could differ from those estimates.
 
INVESTMENTS: Cash and short-term investments primarily include cash, commercial
paper, money market investments, repurchase agreements and short-term bank
participations. All such investments are carried at cost plus accrued interest,
which approximates fair value, have maturities of three months or less and are
considered cash equivalents for purposes of reporting cash flows.
 
Bonds, notes and redeemable preferred stocks available for sale and common
stocks are carried at aggregate fair value and changes in unrealized gains or
losses, net of tax, are credited or charged directly to shareholder's equity.
Bonds, notes and redeemable preferred stocks are reduced to estimated net
realizable value when necessary for declines in value considered to be other
than temporary. Estimates of net realizable value are subjective and actual
realization will be dependent upon future events.
 
Mortgage loans are carried at amortized unpaid balances, net of provisions for
estimated losses. Real estate is carried at the lower of cost or fair value.
Other invested assets include investments in limited partnerships, which are
accounted for by using the cost method of accounting; separate account
investments; leveraged leases; policy loans, which are carried at unpaid
balances; and collateralized mortgage obligation residuals.
 
Realized gains and losses on the sale of investments are recognized in
operations at the date of sale and are determined by using the specific cost
identification method. Premiums and discounts on investments are amortized to
investment income by using the interest method over the contractual lives of the
investments.
 
INTEREST RATE SWAP AGREEMENTS: The net differential to be paid or received on
interest rate swap agreements ("Swap Agreements") entered into to reduce the
impact of changes in interest rates is recognized over the lives of the
agreements, and such differential is classified as Investment Income or Interest
Expense in the income statement. Initially, Swap Agreements are designated as
hedges and, therefore, are not marked to market. However, when a hedged
asset/liability is sold or repaid before the related Swap Agreement matures, the
Swap Agreement is marked to market and any gain/loss is classified with any
gain/loss realized on the disposition of the hedged asset/liability.
Subsequently, the Swap Agreement is marked to market and
 
                                       34
<PAGE>   43
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
the resulting change in fair value is included in Investment Income in the
income statement. When a Swap Agreement that is designated as a hedge is
terminated before its contractual maturity, any resulting gain/loss is
credited/charged to the carrying value of the asset/liability that it hedged and
is treated as a premium/discount for the remaining life of the asset/liability.
 
DEFERRED ACQUISITION COSTS: Policy acquisition costs are deferred and amortized,
with interest, in relation to the incidence of estimated gross profits to be
realized over the estimated lives of the annuity contracts. Estimated gross
profits are composed of net interest income, net realized investment gains and
losses, variable annuity fees, surrender charges and direct administrative
expenses. Costs incurred to sell mutual funds are also deferred and amortized
over the estimated lives of the funds obtained. Deferred acquisition costs
("DAC") consist of commissions and other costs that vary with, and are primarily
related to, the production or acquisition of new business.
 
As debt and equity securities available for sale are carried at aggregate fair
value, an adjustment is made to DAC equal to the change in amortization that
would have been recorded if such securities had been sold at their stated
aggregate fair value and the proceeds reinvested at current yields. The change
in this adjustment, net of tax, is included with the change in net unrealized
gains/losses on debt and equity securities available for sale that is credited
or charged directly to shareholder's equity. DAC have been decreased by
$7,000,000 at September 30, 1998 and $16,400,000 at September 30, 1997 for this
adjustment.
 
VARIABLE ANNUITY ASSETS AND LIABILITIES: The assets and liabilities resulting
from the receipt of variable annuity premiums are segregated in separate
accounts. The Company receives administrative fees for managing the funds and
other fees for assuming mortality and certain expense risks. Such fees are
included in Variable Annuity Fees in the income statement.
 
GOODWILL: Goodwill, amounting to $23,339,000 at September 30, 1998, is amortized
by using the straight-line method over periods averaging 25 years and is
included in Other Assets in the balance sheet. Goodwill is evaluated for
impairment when events or changes in economic conditions indicate that the
carrying amount may not be recoverable.
 
CONTRACTHOLDER RESERVES: Contractholder reserves for fixed annuity contracts and
guaranteed investment contracts are accounted for as investment-type contracts
in accordance with Statement of Financial Accounting Standards No. 97,
"Accounting and Reporting by Insurance Enterprises for Certain Long-Duration
Contracts and for Realized Gains and Losses from the Sale of Investments," and
are recorded at accumulated value (premiums received, plus accrued interest,
less withdrawals and assessed fees).
 
FEE INCOME: Variable annuity fees, asset management fees and surrender charges
are recorded in income as earned. Net retained commissions are recognized as
income on a trade date basis.
 
INCOME TAXES: The Company is included in the consolidated federal income tax
return of the Parent and files as a "life insurance company" under the
provisions of the Internal Revenue Code of 1986. Income taxes have been
calculated as if the Company filed a separate return. Deferred income tax assets
and liabilities are recognized based on the difference between financial
statement carrying amounts and income tax bases of assets and liabilities using
enacted income tax rates and laws.
 
RECENTLY ISSUED ACCOUNTING STANDARDS: In June 1997, the Financial Accounting
Standards Board (the "FASB") issued Statement of Financial Accounting Standards
No. 130, "Reporting Comprehensive Income" ("SFAS 130") and Statement of
Financial Accounting Standards No. 131, "Disclosure about Segments of an
Enterprise and Related Information" ("SFAS 131").
 
SFAS 130 establishes standards for reporting comprehensive income and its
components in a full set of general purpose financial statements. SFAS 130 is
effective for the Company as of October 1, 1998 and is not included in these
financial statements.
 
SFAS 131 establishes standards for the disclosure of information about the
Company's operating segments. SFAS 131 is effective for the year ending
September 30, 1999 and is not included in these financial statements.
 
Implementation of SFAS 130 and SFAS 131 will not have an impact on the Company's
results of operations, financial condition or liquidity.
 
In June 1998, the FASB issued Statement of Financial Accounting Standards No.
133, "Accounting for Derivative Instruments and Hedging Activities" ("SFAS
133"). SFAS 133 addresses the accounting for derivative instruments, including
certain derivative instruments embedded in other contracts, and hedging
activities. SFAS 133 is effective for the Company as of October 1, 1999 and is
not included in these financial statements. The Company has not completed its
analysis of the effect of
 
                                       35
<PAGE>   44
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
2.  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -- (CONTINUED)
SFAS 133, but management believes that it will not have a material impact on the
Company's results of operations, financial condition or liquidity.
 
3.  INVESTMENTS
 
The amortized cost and estimated fair value of bonds, notes and redeemable
preferred stocks available for sale by major category follow:
 
<TABLE>
<CAPTION>
                                                              AMORTIZED COST    ESTIMATED FAIR VALUE
                                                              --------------    --------------------
<S>                                                           <C>               <C>
AT SEPTEMBER 30, 1998:
  Securities of the United States Government................  $   84,377,000       $   88,239,000
  Mortgage-backed securities................................     569,613,000          584,007,000
  Securities of public utilities............................     108,431,000          106,065,000
  Corporate bonds and notes.................................     883,890,000          884,209,000
  Redeemable preferred stocks...............................       6,125,000            6,888,000
  Other debt securities.....................................     282,427,000          285,346,000
                                                              --------------       --------------
  Total.....................................................  $1,934,863,000       $1,954,754,000
                                                              ==============       ==============
AT SEPTEMBER 30, 1997:
  Securities of the United States Government................  $   18,496,000       $   18,962,000
  Mortgage-backed securities................................     636,018,000          649,196,000
  Securities of public utilities............................      22,792,000           22,893,000
  Corporate bonds and notes.................................     984,573,000        1,012,559,000
  Redeemable preferred stocks...............................       6,125,000            6,681,000
  Other debt securities.....................................     274,481,000          275,903,000
                                                              --------------       --------------
  Total.....................................................  $1,942,485,000       $1,986,194,000
                                                              ==============       ==============
</TABLE>
 
The amortized cost and estimated fair value of bonds, notes and redeemable
preferred stocks available for sale by contractual maturity, as of September 30,
1998, follow:
 
<TABLE>
<CAPTION>
                                                              AMORTIZED COST    ESTIMATED FAIR VALUE
                                                              --------------    --------------------
<S>                                                           <C>               <C>
Due in one year or less.....................................  $   19,124,000       $   19,319,000
Due after one year through five years.......................     313,396,000          318,943,000
Due after five years through ten years......................     744,740,000          750,286,000
Due after ten years.........................................     287,990,000          282,199,000
Mortgage-backed securities..................................     569,613,000          584,007,000
                                                              --------------       --------------
Total.......................................................  $1,934,863,000       $1,954,754,000
                                                              ==============       ==============
</TABLE>
 
Actual maturities of bonds, notes and redeemable preferred stocks will differ
from those shown above due to prepayments and redemptions.
 
                                       36
<PAGE>   45
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
3.  INVESTMENTS -- (CONTINUED)
Gross unrealized gains and losses on bonds, notes and redeemable preferred
stocks available for sale by major category follow:
 
<TABLE>
<CAPTION>
                                                                 GROSS          GROSS
                                                              UNREALIZED      UNREALIZED
                                                                 GAINS          LOSSES
                                                              -----------    ------------
<S>                                                           <C>            <C>
AT SEPTEMBER 30, 1998:
  Securities of the United States Government................  $ 3,862,000    $         --
  Mortgage-backed securities................................   15,103,000        (709,000)
  Securities of public utilities............................    2,420,000      (4,786,000)
  Corporate bonds and notes.................................   31,795,000     (31,476,000)
  Redeemable preferred stocks...............................      763,000              --
  Other debt securities.....................................    5,235,000      (2,316,000)
                                                              -----------    ------------
  Total.....................................................  $59,178,000    $(39,287,000)
                                                              ===========    ============
AT SEPTEMBER 30, 1997:
  Securities of the United States Government................  $   498,000    $    (32,000)
  Mortgage-backed securities................................   14,998,000      (1,820,000)
  Securities of public utilities............................      141,000         (40,000)
  Corporate bonds and notes.................................   28,691,000        (705,000)
  Redeemable preferred stocks...............................      556,000              --
  Other debt securities.....................................    1,569,000        (147,000)
                                                              -----------    ------------
  Total.....................................................  $46,453,000    $ (2,744,000)
                                                              ===========    ============
</TABLE>
 
Gross unrealized gains on equity securities available for sale aggregated
$54,000 and $1,004,000 at September 30, 1998 and 1997, respectively. There were
no unrealized losses at September 30, 1998 and 1997.
 
Gross realized investment gains and losses on sales of investments are as
follows:
 
<TABLE>
<CAPTION>
                                                                   YEARS ENDED SEPTEMBER 30,
                                                          --------------------------------------------
                                                              1998            1997            1996
                                                          ------------    ------------    ------------
<S>                                                       <C>             <C>             <C>
BONDS, NOTES AND REDEEMABLE PREFERRED STOCKS:
  Realized gains........................................  $ 28,086,000    $ 22,179,000    $ 14,532,000
  Realized losses.......................................    (4,627,000)    (25,310,000)    (10,432,000)
 
COMMON STOCKS:
  Realized gains........................................       337,000       4,002,000         511,000
  Realized losses.......................................            --        (312,000)     (3,151,000)
 
OTHER INVESTMENTS:
  Realized gains........................................     8,824,000       2,450,000       1,135,000
IMPAIRMENT WRITEDOWNS...................................   (13,138,000)    (20,403,000)    (15,950,000)
                                                          ------------    ------------    ------------
          Total net realized investment gains and
            losses......................................  $ 19,482,000    $(17,394,000)   $(13,355,000)
                                                          ============    ============    ============
</TABLE>
 
                                       37
<PAGE>   46
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
3.  INVESTMENTS -- (CONTINUED)
The sources and related amounts of investment income are as follows:
 
<TABLE>
<CAPTION>
                                                                   YEARS ENDED SEPTEMBER 30,
                                                          --------------------------------------------
                                                              1998            1997            1996
                                                          ------------    ------------    ------------
<S>                                                       <C>             <C>             <C>
Short-term investments..................................  $ 12,524,000    $ 11,780,000    $ 10,647,000
Bonds, notes and redeemable preferred stocks............   156,140,000     163,038,000     140,387,000
Mortgage loans..........................................    29,996,000      17,632,000       8,701,000
Common stocks...........................................        34,000          16,000           8,000
Real estate.............................................      (467,000)       (296,000)       (196,000)
Cost-method partnerships................................    24,311,000       6,725,000       4,073,000
Other invested assets...................................      (572,000)     11,864,000       1,011,000
                                                          ------------    ------------    ------------
          Total investment income.......................  $221,966,000    $210,759,000    $164,631,000
                                                          ============    ============    ============
</TABLE>
 
Expenses incurred to manage the investment portfolio amounted to $1,910,000 for
the year ended September 30, 1998, $2,050,000 for the year ended September 30,
1997, and $1,737,000 for the year ended September 30, 1996, and are included in
General and Administrative Expenses in the income statement.
 
At September 30, 1998, no investment exceeded 10% of the Company's consolidated
shareholder's equity.
 
At September 30, 1998, mortgage loans were collateralized by properties located
in 29 states, with loans totaling approximately 21% of the aggregate carrying
value of the portfolio secured by properties located in California and
approximately 14% by properties located in New York. No more than 8% of the
portfolio was secured by properties in any other single state.
 
At September 30, 1998, bonds, notes and redeemable preferred stocks included
$167,564,000 of bonds and notes not rated investment grade. The Company had no
material concentrations of non-investment-grade assets at September 30, 1998.
 
At September 30, 1998, the carrying value of investments in default as to the
payment of principal or interest was $917,000, all of which were mortgage loans.
Such nonperforming investments had an estimated fair value equal to their
carrying value.
 
As a component of its asset and liability management strategy, the Company
utilizes Swap Agreements to match assets more closely to liabilities. Swap
Agreements are agreements to exchange with a counterparty interest rate payments
of differing character (for example, variable-rate payments exchanged for
fixed-rate payments) based on an underlying principal balance (notional
principal) to hedge against interest rate changes. The Company typically
utilizes Swap Agreements to create a hedge that effectively converts
floating-rate assets and liabilities to fixed-rate instruments. At September 30,
1998, the Company had one outstanding Swap Agreement with a notional principal
amount of $21,538,000, which matures in December 2024. The net interest paid
amounted to $278,000 and $125,000 for the years ended September 30, 1998 and
1997, respectively, and is included in Interest Expense on Guaranteed Investment
Contracts in the income statement.
 
At September 30, 1998, $5,154,000 of bonds, at amortized cost, were on deposit
with regulatory authorities in accordance with statutory requirements.
 
4.  FAIR VALUE OF FINANCIAL INSTRUMENTS
 
The following estimated fair value disclosures are limited to reasonable
estimates of the fair value of only the Company's financial instruments. The
disclosures do not address the value of the Company's recognized and
unrecognized nonfinancial assets (including its real estate investments and
other invested assets except for cost-method partnerships) and liabilities or
the value of anticipated future business. The Company does not plan to sell most
of its assets or settle most of its liabilities at these estimated fair values.
 
The fair value of a financial instrument is the amount at which the instrument
could be exchanged in a current transaction between willing parties, other than
in a forced or liquidation sale. Selling expenses and potential taxes are not
included. The estimated fair value amounts were determined using available
market information, current pricing information and various valuation
methodologies. If quoted market prices were not readily available for a
financial instrument, management determined an
 
                                       38
<PAGE>   47
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
4.  FAIR VALUE OF FINANCIAL INSTRUMENTS -- (CONTINUED)
estimated fair value. Accordingly, the estimates may not be indicative of the
amounts the financial instruments could be exchanged for in a current or future
market transaction.
 
The following methods and assumptions were used to estimate the fair value of
each class of financial instruments for which it is practicable to estimate that
value:
 
CASH AND SHORT-TERM INVESTMENTS: Carrying value is considered to be a reasonable
estimate of fair value.
 
BONDS, NOTES AND REDEEMABLE PREFERRED STOCKS: Fair value is based principally on
independent pricing services, broker quotes and other independent information.
 
MORTGAGE LOANS: Fair values are primarily determined by discounting future cash
flows to the present at current market rates, using expected prepayment rates.
 
COMMON STOCKS: Fair value is based principally on independent pricing services,
broker quotes and other independent information.
 
COST-METHOD PARTNERSHIPS: Fair value of limited partnerships accounted for by
using the cost method is based upon the fair value of the net assets of the
partnerships as determined by the general partners.
 
VARIABLE ANNUITY ASSETS HELD IN SEPARATE ACCOUNTS: Variable annuity assets are
carried at the market value of the underlying securities.
 
RESERVES FOR FIXED ANNUITY CONTRACTS: Deferred annuity contracts and single
premium life contracts are assigned a fair value equal to current net surrender
value. Annuitized contracts are valued based on the present value of future cash
flows at current pricing rates.
 
RESERVES FOR GUARANTEED INVESTMENT CONTRACTS: Fair value is based on the present
value of future cash flows at current pricing rates and is net of the estimated
fair value of a hedging Swap Agreement, determined from independent broker
quotes.
 
PAYABLE TO BROKERS FOR PURCHASES OF SECURITIES: Such obligations represent net
transactions of a short-term nature for which the carrying value is considered a
reasonable estimate of fair value.
 
VARIABLE ANNUITY LIABILITIES RELATED TO SEPARATE ACCOUNTS: Fair values of
contracts in the accumulation phase are based on net surrender values. Fair
values of contracts in the payout phase are based on the present value of future
cash flows at assumed investment rates.
 
SUBORDINATED NOTES PAYABLE TO PARENT: Fair value is estimated based on the
quoted market prices for similar issues.
 
                                       39
<PAGE>   48
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
4.  FAIR VALUE OF FINANCIAL INSTRUMENTS -- (CONTINUED)
The estimated fair values of the Company's financial instruments at September
30, 1998 and 1997, compared with their respective carrying values, are as
follows:
 
<TABLE>
<CAPTION>
                                                              CARRYING VALUE       FAIR VALUE
                                                              ---------------    ---------------
<S>                                                           <C>                <C>
1998:
ASSETS:
  Cash and short-term investments...........................  $   333,735,000    $   333,735,000
  Bonds, notes and redeemable preferred stocks..............    1,954,754,000      1,954,754,000
  Mortgage loans............................................      391,448,000        415,981,000
  Common stocks.............................................          169,000            169,000
  Cost-method partnerships..................................        4,403,000         12,744,000
  Variable annuity assets held in separate accounts.........   11,133,569,000     11,133,569,000
LIABILITIES:
  Reserves for fixed annuity contracts......................    2,189,272,000      2,116,874,000
  Reserves for guaranteed investment contracts..............      282,267,000        282,267,000
  Payable to brokers for purchases of securities............       27,053,000         27,053,000
  Variable annuity liabilities related to separate
     accounts...............................................   11,133,569,000     10,696,607,000
  Subordinated notes payable to Parent......................       39,182,000         40,550,000
                                                              ===============    ===============
1997:
ASSETS:
  Cash and short-term investments...........................  $   113,580,000    $   113,580,000
  Bonds, notes and redeemable preferred stocks..............    1,986,194,000      1,986,194,000
  Mortgage loans............................................      339,530,000        354,495,000
  Common stocks.............................................        1,275,000          1,275,000
  Cost-method partnerships..................................       46,880,000         84,186,000
  Variable annuity assets held in separate accounts.........    9,343,200,000      9,343,200,000
LIABILITIES:
  Reserves for fixed annuity contracts......................    2,098,803,000      2,026,258,000
  Reserves for guaranteed investment contracts..............      295,175,000        295,175,000
  Payable to brokers for purchases of securities............          263,000            263,000
  Variable annuity liabilities related to separate
     accounts...............................................    9,343,200,000      9,077,200,000
  Subordinated notes payable to Parent......................       36,240,000         37,393,000
                                                              ===============    ===============
</TABLE>
 
5.  SUBORDINATED NOTES PAYABLE TO PARENT
 
Subordinated notes and accrued interest payable to Parent totaled $39,182,000 at
interest rates ranging from 8.5% to 9% at September 30, 1998, and require
principal payments of $23,060,000 in 1999, $5,400,000 in 2000 and $10,000,000 in
2001.
 
6.  REINSURANCE
 
On August 11, 1998, the Company entered into a modified coinsurance transaction,
approved by the Arizona Department of Insurance, which involves the ceding of
approximately $5,000,000,000 of variable annuities to ANLIC Insurance Company
(Cayman), a Cayman Islands stock life insurance company, effective December 31,
1997. As a part of this transaction, the Company received cash amounting to
approximately $188,700,000, and recorded a corresponding reduction of DAC
related to the coinsured annuities.
 
As payments are made to the reinsurer, the reduction of DAC is relieved. The net
reduction in DAC at September 30, 1998 was $166,631,000. Certain expenses
related to this transaction are being charged directly to DAC amortization in
the income statement. The net effect of this transaction in the income statement
is not material.
 
                                       40
<PAGE>   49
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
7.  CONTINGENT LIABILITIES
 
The Company has entered into three agreements in which it has provided liquidity
support for certain short-term securities of two municipalities by agreeing to
purchase such securities in the event there is no other buyer in the short-term
marketplace. In return the Company receives a fee. The maximum liability under
these guarantees is $242,600,000. Management does not anticipate any material
future losses with respect to these liquidity support facilities. An additional
$51,000,000 has been committed to investments in the process of being funded or
to be available in the case of certain natural disasters, for which the Company
receives a fee.
 
The Company is involved in various kinds of litigation common to its businesses.
These cases are in various stages of development and, based on reports of
counsel, management believes that provisions made for potential losses relating
to such litigation are adequate and any further liabilities and costs will not
have a material adverse impact upon the Company's financial position or results
of operations.
 
8.  SHAREHOLDER'S EQUITY
 
The Company is authorized to issue 4,000 shares of its $1,000 par value Common
Stock. At September 30, 1998 and 1997, 3,511 shares were outstanding.
 
Changes in shareholder's equity are as follows:
 
<TABLE>
<CAPTION>
                                                                   YEARS ENDED SEPTEMBER 30,
                                                          --------------------------------------------
                                                              1998            1997            1996
                                                          ------------    ------------    ------------
<S>                                                       <C>             <C>             <C>
ADDITIONAL PAID-IN CAPITAL:
  Beginning balances....................................  $308,674,000    $280,263,000    $252,876,000
  Capital contributions received........................            --      28,411,000      27,387,000
                                                          ------------    ------------    ------------
  Ending balances.......................................  $308,674,000    $308,674,000    $280,263,000
                                                          ============    ============    ============
RETAINED EARNINGS:
  Beginning balances....................................  $244,628,000    $207,002,000    $191,346,000
  Net income............................................   138,641,000      63,126,000      45,056,000
  Dividend paid.........................................   (51,200,000)    (25,500,000)    (29,400,000)
                                                          ------------    ------------    ------------
  Ending balances.......................................  $332,069,000    $244,628,000    $207,002,000
                                                          ============    ============    ============
NET UNREALIZED GAINS (LOSSES) ON
  DEBT AND EQUITY SECURITIES
  AVAILABLE FOR SALE:
  Beginning balances....................................  $ 18,405,000    $ (5,521,000)   $ (5,673,000)
  Change in net unrealized gains (losses) on debt
     securities available for sale......................   (23,818,000)     57,463,000      (2,904,000)
  Change in net unrealized gains (losses) on equity
     securities available for sale......................      (950,000)        (55,000)      3,538,000
  Change in adjustment to deferred acquisition costs....     9,400,000     (20,600,000)       (400,000)
  Tax effects of net changes............................     5,378,000     (12,882,000)        (82,000)
                                                          ------------    ------------    ------------
  Ending balances.......................................  $  8,415,000    $ 18,405,000    $ (5,521,000)
                                                          ============    ============    ============
</TABLE>
 
Dividends that the Company may pay to its shareholder in any year without prior
approval of the Arizona Department of Insurance are limited by statute. The
maximum amount of dividends which can be paid to shareholders of insurance
companies domiciled in the state of Arizona without obtaining the prior approval
of the Insurance Commissioner is limited to the lesser of either 10% of the
preceding year's statutory surplus or the preceding year's statutory net gain
from operations. Dividends in the amounts of $51,200,000, $25,500,000 and
$29,400,000 were paid on June 4, 1998, April 1, 1997 and March 18, 1996,
respectively.
 
Under statutory accounting principles utilized in filings with insurance
regulatory authorities, the Company's net income for the nine months ended
September 30, 1998 was $64,125,000. The statutory net income for the year ended
December 31, 1997 was
 
                                       41
<PAGE>   50
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
8.  SHAREHOLDER'S EQUITY -- (CONTINUED)
$74,407,000, and the statutory net income for the year ended December 31, 1996
was $27,928,000. The Company's statutory capital and surplus was $537,542,000 at
September 30, 1998, $567,979,000 at December 31, 1997 and $311,176,000 at
December 31, 1996.
 
9.  INCOME TAXES
 
The components of the provisions for federal income taxes on pretax income
consist of the following:
 
<TABLE>
<CAPTION>
                                                           NET REALIZED
                                                            INVESTMENT
                                                          GAINS (LOSSES)     OPERATIONS        TOTAL
                                                          --------------    ------------    ------------
<S>                                                       <C>               <C>             <C>
1998:
Currently payable.......................................   $  4,221,000     $ 32,743,000    $ 36,964,000
Deferred................................................       (550,000)      34,637,000      34,087,000
                                                           ------------     ------------    ------------
     Total income tax expense...........................   $  3,671,000     $ 67,380,000    $ 71,051,000
                                                           ============     ============    ============
 
1997:
Currently payable.......................................   $ (3,635,000)    $ 50,828,000    $ 47,193,000
Deferred................................................     (2,258,000)     (13,766,000)    (16,024,000)
                                                           ------------     ------------    ------------
     Total income tax expense...........................   $ (5,893,000)    $ 37,062,000    $ 31,169,000
                                                           ============     ============    ============
 
1996:
Currently payable.......................................   $  5,754,000     $ 21,849,000    $ 27,603,000
Deferred................................................    (10,347,000)       6,996,000      (3,351,000)
                                                           ------------     ------------    ------------
     Total income tax expense...........................   $ (4,593,000)    $ 28,845,000    $ 24,252,000
                                                           ============     ============    ============
</TABLE>
 
Income taxes computed at the United States federal income tax rate of 35% and
income taxes provided differ as follows:
 
<TABLE>
<CAPTION>
                                                                     YEARS ENDED SEPTEMBER 30,
                                                             -----------------------------------------
                                                                1998           1997           1996
                                                             -----------    -----------    -----------
<S>                                                          <C>            <C>            <C>
Amount computed at statutory rate..........................  $73,392,000    $33,003,000    $24,258,000
Increases (decreases) resulting from:
  Amortization of differences between book and tax bases of
     net assets acquired...................................      460,000        666,000        464,000
  State income taxes, net of federal tax benefit...........    5,530,000      1,950,000      2,070,000
  Dividends-received deduction.............................   (7,254,000)    (4,270,000)    (2,357,000)
  Tax credits..............................................   (1,296,000)      (318,000)      (257,000)
  Other, net...............................................      219,000        138,000         74,000
                                                             -----------    -----------    -----------
          Total income tax expense.........................  $71,051,000    $31,169,000    $24,252,000
                                                             ===========    ===========    ===========
</TABLE>
 
For United States federal income tax purposes, certain amounts from life
insurance operations are accumulated in a memorandum policyholders' surplus
account and are taxed only when distributed to shareholders or when such account
exceeds prescribed limits. The accumulated policyholders' surplus was
$14,300,000 at September 30, 1998. The Company does not anticipate any
transactions which would cause any part of this surplus to be taxable.
 
                                       42
<PAGE>   51
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
9.  INCOME TAXES -- (CONTINUED)
Deferred income taxes reflect the net tax effects of temporary differences
between the carrying amounts of assets and liabilities for financial reporting
purposes and the amounts used for income tax reporting purposes. The significant
components of the liability for Deferred Income Taxes are as follows:
 
<TABLE>
<CAPTION>
                                                                      SEPTEMBER 30,
                                                              ------------------------------
                                                                  1998             1997
                                                              -------------    -------------
<S>                                                           <C>              <C>
DEFERRED TAX LIABILITIES:
Investments.................................................  $  17,643,000    $  13,160,000
Deferred acquisition costs..................................    223,392,000      154,949,000
State income taxes..........................................      2,873,000        1,777,000
Other liabilities...........................................        144,000               --
Net unrealized gains on debt and equity securities available
  for sale..................................................      4,531,000        9,910,000
                                                              -------------    -------------
Total deferred tax liabilities..............................    248,583,000      179,796,000
                                                              -------------    -------------
DEFERRED TAX ASSETS:
Contractholder reserves.....................................   (149,915,000)    (108,090,000)
Guaranty fund assessments...................................     (2,910,000)      (2,707,000)
Other assets................................................             --       (1,952,000)
                                                              -------------    -------------
Total deferred tax assets...................................   (152,825,000)    (112,749,000)
                                                              -------------    -------------
Deferred income taxes.......................................  $  95,758,000    $  67,047,000
                                                              =============    =============
</TABLE>
 
10.  RELATED-PARTY MATTERS
 
The Company pays commissions to five affiliated companies, SunAmerica
Securities, Inc., Advantage Capital Corp., Financial Services Corp., Sentra
Securities Corp. and Spelman & Co. Inc. Commissions paid to these broker-dealers
totaled $32,946,000 in 1998, $25,492,000 in 1997, and $16,906,000 in 1996. These
broker-dealers, when combined with the Company's wholly owned broker-dealer,
represent a significant portion of the Company's business, amounting to
approximately 33.6%, 36.1%, and 38.3% of premiums in 1998, 1997, and 1996,
respectively. The Company also sells its products through unaffiliated
broker-dealers, the largest two of which represented approximately 17.3% and
8.4% of premiums in 1998, 19.2% and 10.1% in 1997, and 19.7% and 10.2% in 1996,
respectively.
 
The Company purchases administrative, investment management, accounting,
marketing and data processing services from SunAmerica Financial, whose purpose
is to provide services to the Company and its affiliates. Amounts paid for such
services totaled $84,975,000 for the year ended September 30, 1998, $86,116,000
for the year ended September 30, 1997 and $65,351,000 for the year ended
September 30, 1996. The marketing component of such costs during these periods
amounted to $39,482,000, $31,968,000 and $17,442,000, respectively, and are
deferred and amortized as part of Deferred Acquisition Costs. The other
components of such costs are included in General and Administrative Expenses in
the income statement.
 
The Parent made a capital contribution of $28,411,000 in December 1996 to the
Company, through the Company's direct parent, in exchange for the termination of
its guaranty with respect to certain real estate owned in Arizona. Accordingly,
the Company reduced the carrying value of this real estate to estimated fair
value to reflect the termination of the guaranty.
 
During the year ended September 30, 1998, the Company sold various invested
assets to the Parent for cash equal to their current market value of
$64,431,000. The Company recorded a net gain aggregating $16,388,000 on such
transactions.
 
During the year ended September 30, 1998, the Company purchased certain invested
assets from the Parent, SunAmerica Life Insurance Company and CalAmerica Life
Insurance Company for cash equal to their current market value, which aggregated
$20,666,000, $10,468,000 and $61,000, respectively.
 
During the year ended September 30, 1997, the Company sold various invested
assets to SunAmerica Life Insurance Company and to CalAmerica Life Insurance
Company for cash equal to their current market value of $15,776,000 and $15,000,
respectively. The Company recorded a net gain aggregating $276,000 on such
transactions.
 
                                       43
<PAGE>   52
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
10.  RELATED-PARTY MATTERS -- (CONTINUED)
During the year ended September 30, 1997, the Company purchased certain invested
assets from SunAmerica Life Insurance Company and CalAmerica Life Insurance
Company for cash equal to their current market value of $8,717,000 and $284,000,
respectively.
 
During the year ended September 30, 1996, the Company sold various invested
assets to the Parent and to SunAmerica Life Insurance Company for cash equal to
their current market value of $274,000 and $47,321,000, respectively. The
Company recorded a net loss aggregating $3,000 on such transactions.
 
During the year ended September 30, 1996, the Company purchased certain invested
assets from SunAmerica Life Insurance Company for cash equal to their current
market value, which aggregated $28,379,000.
 
11.  BUSINESS SEGMENTS
 
Summarized data for the Company's business segments follow:
 
<TABLE>
<CAPTION>
                                                             TOTAL
                                                        DEPRECIATION AND
                                    TOTAL REVENUES    AMORTIZATION EXPENSE    PRETAX INCOME     TOTAL ASSETS
                                    --------------    --------------------    -------------    ---------------
<S>                                 <C>               <C>                     <C>              <C>
1998:
Annuity operations................   $443,407,000         $60,731,000         $178,120,000     $14,366,018,000
Broker-dealer operations..........     47,363,000           1,770,000           22,401,000          55,870,000
Asset management operations.......     41,040,000          14,780,000            9,171,000         104,476,000
                                     ------------         -----------         ------------     ---------------
     Total........................   $531,810,000         $77,281,000         $209,692,000     $14,526,364,000
                                     ============         ===========         ============     ===============
1997:
Annuity operations................   $332,845,000         $55,675,000         $ 74,792,000     $12,438,021,000
Broker-dealer operations..........     38,005,000             689,000           16,705,000          51,400,000
Asset management operations.......     35,661,000          16,357,000            2,798,000          81,518,000
                                     ------------         -----------         ------------     ---------------
     Total........................   $406,511,000         $72,721,000         $ 94,295,000     $12,570,939,000
                                     ============         ===========         ============     ===============
1996:
Annuity operations................   $256,681,000         $43,974,000         $ 53,827,000     $ 9,092,770,000
Broker-dealer operations..........     31,053,000             449,000           13,033,000          37,355,000
Asset management operations.......     33,047,000          18,295,000            2,448,000          74,410,000
                                     ------------         -----------         ------------     ---------------
     Total........................   $320,781,000         $62,718,000         $ 69,308,000     $ 9,204,535,000
                                     ============         ===========         ============     ===============
</TABLE>
 
12.  SUBSEQUENT EVENTS
 
On July 15, 1998, the Company entered into a definitive agreement to acquire the
individual life business and the individual and group annuity business of MBL
Life Assurance Corporation ("MBL Life") via a 100% coinsurance transaction for
approximately $130,000,000 in cash. The transaction will include approximately
$2,000,000,000 of universal life reserves and $3,000,000,000 of fixed annuity
reserves. The Company plans to reinsure a large portion of the mortality risk
associated with the acquired block of universal life business. Completion of
this acquisition is expected by the end of calendar year 1998 and is subject to
customary conditions and required approvals. Included in this block of business
is approximately $250,000,000 of individual life business and $500,000,000 of
group annuity business whose contract owners are residents of New York State
("the New York Business"). Approximately six months subsequent to completion of
the transaction, the New York Business will be acquired by the Company's New
York affiliate, First SunAmerica Life Insurance Company, and the remainder of
the business will be acquired by the Company via assumption reinsurance
agreements between MBL Life and the respective companies, which will supersede
the coinsurance agreement. The $130,000,000 purchase price will be allocated
between the Company and its affiliate based on their respective assumed life
insurance reserves.
 
                                       44
<PAGE>   53
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
12.  SUBSEQUENT EVENTS -- (CONTINUED)
On August 20, 1998, the Parent announced that it has entered into a definite
agreement to merge with and into American International Group, Inc. ("AIG").
Under the terms of the agreement, each share of the Parent's common stock
(including Nontransferable Class B) will be exchanged for 0.855 shares of AIG's
common stock. The transaction will be treated as a pooling of interests for
accounting purposes and will be a tax-free reorganization. The transaction was
approved by both the Parent's and AIG's shareholders on November 18, 1998, and,
subject to various regulatory approvals, will be completed in late 1998 or early
1999.
 
                                       45
<PAGE>   54
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                 APPENDIX A -- CONDENSED FINANCIAL INFORMATION
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                 FISCAL YEAR    FISCAL YEAR   FISCAL YEAR   FISCAL YEAR   FISCAL YEAR
                  PORTFOLIOS                       11/30/94      11/30/95      11/30/96      11/30/97      11/30/98
- ---------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------
<S>                                              <C>            <C>           <C>           <C>           <C>
Capital Appreciation
  Beginning AUV................................   $    11.14    $    10.64    $    14.19    $    17.63    $    21.26
  Ending AUV...................................   $    10.64    $    14.19    $    17.63    $    21.26    $    23.72
  Ending Number of AUs.........................    8,462,152    13,247,155    20,470,395    24,889,133    24,068,557
- ---------------------------------------------------------------------------------------------------------------------
Growth
  Beginning AUV................................   $    10.78    $    10.41    $    12.95    $    16.32    $    20.31
  Ending AUV...................................   $    10.41    $    12.95    $    16.32    $    20.31    $    24.41
  Ending Number of AUs.........................    3,950,678     5,968,263     7,557,844     9,747,428     9,838,138
- ---------------------------------------------------------------------------------------------------------------------
Natural Resources (Inception Date -- 10/31/94)
  Beginning AUV................................   $    10.00    $     9.27    $    10.78    $    12.13    $    11.14
  Ending AUV...................................   $     9.27    $    10.78    $    12.13    $    11.14    $     9.30
  Ending Number of AUs.........................       51,412       848,159     2,171,050     2,937,198     2,605,274
- ---------------------------------------------------------------------------------------------------------------------
Government and Quality Bond
  Beginning AUV................................   $    10.32    $     9.81    $    11.51    $    11.94    $    12.65
  Ending AUV...................................   $     9.81    $    11.51    $    11.94    $    12.65    $    13.66
  Ending Number of AUs.........................    7,008,717     8,504,677     9,176,239    10,047,042    14,076,819
- ---------------------------------------------------------------------------------------------------------------------
Emerging Markets (Inception Date -- 6/2/97)
  Beginning AUV................................           --            --            --    $    10.00    $     7.97
  Ending AUV...................................           --            --            --    $     7.97    $     6.14
  Ending Number of AUs.........................           --            --            --     1,751,922     1,352,484
- ---------------------------------------------------------------------------------------------------------------------
International Diversified Equities (Inception
  Date -- 10/31/94)
  Beginning AUV................................   $    10.00    $     9.77    $    10.07    $    11.39    $    11.62
  Ending AUV...................................   $     9.77    $    10.07    $    11.39    $    11.62    $    13.53
  Ending Number of AUs.........................      271,316     4,659,066    12,762,343    18,010,557    17,917,499
- ---------------------------------------------------------------------------------------------------------------------
Global Equities
  Beginning AUV................................   $    10.86    $    11.43    $    13.01    $    15.15    $    16.90
  Ending AUV...................................   $    11.43    $    13.01    $    15.15    $    16.90    $    19.21
  Ending Number of AUs.........................   11,705,418    12,350,883    15,583,207    18,376,185    17,594,064
- ---------------------------------------------------------------------------------------------------------------------
International Growth and Income (Inception Date -- 6/2/97)
  Beginning AUV................................           --            --            --    $    10.00    $    10.33
  Ending AUV...................................           --            --            --    $    10.33    $    11.16
  Ending Number of AUs.........................           --            --            --     2,721,228     3,306,665
- ---------------------------------------------------------------------------------------------------------------------
Aggressive Growth (Inception Date -- 6/3/96)
  Beginning AUV................................           --            --    $    10.00    $    10.29    $    11.51
  Ending AUV...................................           --            --    $    10.29    $    11.51    $    11.86
  Ending Number of AUs.........................           --            --     3,165,900     7,215,024     7,059,502
- ---------------------------------------------------------------------------------------------------------------------
Real Estate (Inception Date -- 6/2/97)
  Beginning AUV................................           --            --            --    $    10.00    $    11.44
  Ending AUV...................................           --            --            --    $    11.44    $     9.80
  Ending Number of AUs.........................           --            --            --     1,632,804     2,521,169
- ---------------------------------------------------------------------------------------------------------------------
Putnam Growth
  Beginning AUV................................   $     9.92    $     9.79    $    12.60    $    14.88    $    18.47
  Ending AUV...................................   $     9.79    $    12.60    $    14.88    $    18.47    $    22.29
  Ending Number of AUs.........................    7,610,104     8,932,998    10,354,025    11,336,732    12,052,558
- ---------------------------------------------------------------------------------------------------------------------
MFS Growth and Income**
  Beginning AUV................................   $    10.65    $     9.79    $    12.81    $    14.94    $    17.63
  Ending AUV...................................   $     9.79    $    12.81    $    14.94    $    17.63    $    20.46
  Ending Number of AUs.........................   10,477,818    11,457,899    12,077,737    11,714,450    10,439,634
- ---------------------------------------------------------------------------------------------------------------------
Alliance Growth
  Beginning AUV................................   $    10.78    $    10.53    $    15.44    $    19.46    $    24.51
  Ending AUV...................................   $    10.53    $    15.44    $    19.46    $    24.51    $    32.81
  Ending Number of AUs.........................    4,997,778    10,560,070    18,333,555    24,050,697    24,146,276
- ---------------------------------------------------------------------------------------------------------------------
 * Formerly named Growth/Phoenix and managed by Phoenix Investment Counsel, Inc.
</TABLE>
 
                                       A-1
<PAGE>   55
 
<TABLE>
<CAPTION>
                                                 FISCAL YEAR    FISCAL YEAR   FISCAL YEAR   FISCAL YEAR   FISCAL YEAR
                  PORTFOLIOS                       11/30/94      11/30/95      11/30/96      11/30/97      11/30/98
- ---------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------
<S>                                              <C>            <C>           <C>           <C>           <C>
"Dogs" of Wall Street (Inception Date -- 4/1/98)
  Beginning AUV................................                                                           $     9.83
  Ending AUV...................................                                                           $     9.71
  Ending Number of AUs.........................                                                            1,450,214
- ---------------------------------------------------------------------------------------------------------------------
Venture Value (Inception Date -- 10/31/94)
  Beginning AUV................................   $    10.00    $     9.77    $    13.29    $    16.68    $    21.30
  Ending AUV...................................   $     9.77    $    13.29    $    16.68    $    21.30    $    23.36
  Ending Number of AUs.........................      355,083    11,270,792    29,247,554    44,892,446    46,069,429
- ---------------------------------------------------------------------------------------------------------------------
Federated Value (Inception Date -- 6/3/96)
  Beginning AUV................................           --            --    $    10.00    $    11.00    $    13.62
  Ending AUV...................................           --            --    $    11.00    $    13.62    $    15.86
  Ending Number of AUs.........................           --            --     1,021,137     3,095,513     4,255,000
- ---------------------------------------------------------------------------------------------------------------------
Growth-Income
  Beginning AUV................................   $    10.47    $    10.09    $    13.32    $    16.70    $    21.41
  Ending AUV...................................   $    10.09    $    13.32    $    16.70    $    21.41    $    25.71
  Ending Number of AUs.........................    8,329,322    12,560,865    18,546,142    24,795,824    25,801,808
- ---------------------------------------------------------------------------------------------------------------------
Utility (Inception Date -- 6/3/96)
  Beginning AUV................................           --            --    $    10.00    $    10.67    $    12.74
  Ending AUV...................................           --            --    $    10.67    $    12.74    $    14.56
  Ending Number of AUs.........................           --            --       543,461     1,541,346     2,120,487
- ---------------------------------------------------------------------------------------------------------------------
Asset Allocation
  Beginning AUV................................   $    10.30    $    10.17    $    12.64    $    14.97    $    17.98
  Ending AUV...................................   $    10.17    $    12.64    $    14.97    $    17.98    $    18.22
  Ending Number of AUs.........................   10,372,954    15,418,350    19,940,733    25,272,776    26,043,996
- ---------------------------------------------------------------------------------------------------------------------
MFS Total Return** (Inception Date -- 10/31/94)
  Beginning AUV................................   $    10.00    $     9.95    $    12.33    $    13.82    $    15.45
  Ending AUV...................................   $     9.95    $    12.33    $    13.82    $    15.45    $    17.28
  Ending Number of AUs.........................       51,759     2,441,901     4,583,234     5,415,312     5,465,650
- ---------------------------------------------------------------------------------------------------------------------
SunAmerica Balanced (Inception Date -- 6/3/96)
  Beginning AUV................................           --            --    $    10.00    $    11.04    $    13.22
  Ending AUV...................................           --            --    $    11.04    $    13.22    $    15.60
  Ending Number of AUs.........................           --            --       817,039     2,447,948     4,179,545
- ---------------------------------------------------------------------------------------------------------------------
Worldwide High Income (Inception
  Date -- 10/31/94)
  Beginning AUV................................   $    10.00    $     9.95    $    11.36    $    14.20    $    15.98
  Ending AUV...................................   $     9.95    $    11.36    $    14.20    $    15.98    $    13.57
  Ending Number of AUs.........................       53,315     1,040,828     3,196,739     6,368,247     5,463,589
- ---------------------------------------------------------------------------------------------------------------------
High-Yield Bond
  Beginning AUV................................   $    10.98    $    10.35    $    11.48    $    12.99    $    14.66
  Ending AUV...................................   $    10.35    $    11.48    $    12.99    $    14.66    $    14.25
  Ending Number of AUs.........................    5,370,944     7,075,451     8,358,195    11,443,250    12,597,083
- ---------------------------------------------------------------------------------------------------------------------
Corporate Bond
  Beginning AUV................................   $    10.12    $     9.63    $    11.10    $    11.65    $    12.54
  Ending AUV...................................   $     9.63    $    11.10    $    11.65    $    12.54    $    13.15
  Ending Number of AUs.........................    1,643,694     2,623,065     3,059,808     4,235,990     5,896,471
- ---------------------------------------------------------------------------------------------------------------------
Global Bond
  Beginning AUV................................   $    10.25    $     9.78    $    11.20    $    12.25    $    13.08
  Ending AUV...................................   $     9.78    $    11.20    $    12.25    $    13.08    $    14.40
  Ending Number of AUs.........................    4,532,386     5,288,158     5,413,149     6,164,455     5,906,756
- ---------------------------------------------------------------------------------------------------------------------
Cash Management
  Beginning AUV................................   $    10.07    $    10.27    $    10.67    $    11.04    $     4.43
  Ending AUV...................................   $    10.27    $    10.67    $    11.04    $    11.43    $    11.83
  Ending Number of AUs.........................    8,623,034     8,372,979     8,005,908    11,224,451    11,160,200
- ---------------------------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>
 
** Formerly named Balanced/Phoenix and managed by Phoenix Investment Counsel,
Inc.
 
AUV -- Accumulation Unit Value
 
 AU -- Accumulation Units
 
                                       A-2
<PAGE>   56
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                  APPENDIX B - MARKET VALUE ADJUSTMENT ("MVA")
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
The MVA reflects the impact that changing interest rates have on the value of
money invested at a fixed interest rate. The longer the period of time remaining
in the term you initially agreed to leave your money in the fixed account
option, the greater the impact of changing interest rates. The impact of the MVA
can be either positive or negative, and is computed by multiplying the amount
withdrawn, transferred or switched to the Income Phase by the following factor:

                                            (N/12)
                          [(1+I/(1+J+0.005)]       - 1
 
                  The MVA formula may differ in certain states
  where:
 
        I is the interest rate you are earning on the money invested in the
        fixed account option;
 
        J is the interest rate then currently available for the period of time
        equal to the number of years remaining in the term you initially agreed
        to leave your money in the fixed account option; and
 
        N is the number of full months remaining in the term you initially
        agreed to leave your money in the fixed account option.
 
EXAMPLES OF THE MVA
 
The examples below assume the following:
 
     (1) You made an initial Purchase Payment of $10,000 and allocated it to the
         10-year fixed account option at a rate of 5%;
 
     (2) You make a partial withdrawal of $4,000 when 1 1/2 years (18 months)
         remain in the 10-year term you initially agreed to leave your money in
         the fixed account option (N=18); and
 
     (3) You have not made any other transfers, additional Purchase Payments, or
         withdrawals.
 
No withdrawal charges are reflected because your Purchase Payment has been in
the contract for seven full years. If a withdrawal charge applies, it is
deducted before the MVA. The MVA is assessed on the amount withdrawn less any
withdrawal charges.
 
POSITIVE ADJUSTMENT
 
Assume that on the date of withdrawal, the interest rate in effect for a new
Purchase Payments in the 1-year fixed account option is 3.5% and the 3-year
fixed account option is 4.5%. By linear interpolation, the interest rate for the
remaining 2 years (1 1/2 years rounded up to the next full year) in the contract
is calculated to be 4%.

                                      (N/12) 
The MVA factor is = [(1+I/(1+J+0.005)]       - 1
                                         (18/12)
                  = [(1.05)/(1.04+0.005)]        - 1
                              (1.5)
                  = (1.004785)      - 1
                  = 1.007186 - 1
                  = + 0.007186
 
The requested withdrawal amount is multiplied by the MVA factor to determine the
MVA:
                         $4,000 x (+0.007186) = +$28.74
 
$28.74 represents the MVA that would be added to your withdrawal.
 
NEGATIVE ADJUSTMENT
 
Assume that on the date of withdrawal, the interest rate in effect for new
Purchase Payments in the 1-year fixed account option is 5.5% and the 3-year
fixed account option is 6.5%. By linear interpolation, the interest rate for the
remaining 2 years (1 1/2 years rounded up to the next full year) in the contract
is calculated to be 6%.
 
                                       (N/12)
The MVA factor is = [(1+I)/(1+J+0.005)]       - 1
                                         (18/12)
                  = [(1.05)/(1.06+0.005)]        - 1
                              (1.5)
                  = (0.985915)      - 1
                  = 0.978948 - 1
                  = - 0.021052
 
The requested withdrawal amount is multiplied by the MVA factor to determine the
MVA:
                        $4,000 X (- 0.021052) = -$84.21
 
$84.21 represents the MVA that will be deducted from the money remaining in the
10-year fixed account option.
 
                                       B-1
<PAGE>   57
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                           APPENDIX C - PREMIUM TAXES
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
Premium taxes vary according to the state and are subject to change without
notice. In many states, there is no tax at all. Listed below are the current
premium tax rates in those states that assess a premium tax. For current
information, you should consult your tax adviser.
 
<TABLE>
<CAPTION>
                                                              QUALIFIED    NON-QUALIFIED
                           STATE                              CONTRACT       CONTRACT
<S>                                                           <C>          <C>
========================================================================================
California                                                        .50%          2.35%
- ----------------------------------------------------------------------------------------
District of Columbia                                             2.25%          2.25%
- ----------------------------------------------------------------------------------------
Kentucky                                                            2%             2%
- ----------------------------------------------------------------------------------------
Maine                                                               0%             2%
- ----------------------------------------------------------------------------------------
Nevada                                                              0%           3.5%
- ----------------------------------------------------------------------------------------
South Dakota                                                        0%          1.25%
- ----------------------------------------------------------------------------------------
West Virginia                                                       1%             1%
- ----------------------------------------------------------------------------------------
Wyoming                                                             0%             1%
- ----------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------
</TABLE>
 
                                       C-1
<PAGE>   58
 
- --------------------------------------------------------------------------------
 
   Please forward a copy (without charge) of the Polaris Variable Annuity
   Statement of Additional Information to:
 
              (Please print or type and fill in all information.)
 
        ------------------------------------------------------------------------
        Name
 
        ------------------------------------------------------------------------
        Address
 
        ------------------------------------------------------------------------
        City/State/Zip
 
<TABLE>
<S>    <C>                                    <C>      <C>
 
Date:  ------------------------------------   Signed:  ---------------------------------------
</TABLE>
 
   Return to: Anchor National Life Insurance Company, Annuity Service Center,
   P.O. Box 52499, Los Angeles, California 90054-0299
- --------------------------------------------------------------------------------
<PAGE>   59
                       STATEMENT OF ADDITIONAL INFORMATION


                   Fixed and Variable Group Deferred Contracts
                                    issued by

                            VARIABLE SEPARATE ACCOUNT


                DEPOSITOR: ANCHOR NATIONAL LIFE INSURANCE COMPANY


   
This Statement of Additional Information is not a prospectus; it should be read
with the prospectus dated January 29, 1999, relating to the annuity contracts
described above, a copy of which may be obtained without charge by written
request addressed to:
    

                     Anchor National Life Insurance Company
                             Annuity Service Center
                                 P.O. Box 54299
                       Los Angeles, California 90054-0299

             THE DATE OF THIS STATEMENT OF ADDITIONAL INFORMATION IS

                                January 29, 1999

<PAGE>   60
                                TABLE OF CONTENTS

   
<TABLE>
<CAPTION>
                                                                             PAGE
                                                                             ----
<S>                                                                          <C>
Separate Account............................................................   3

General Account.............................................................   3

Performance Data............................................................   4

Income Payments.............................................................   8

Annuity Unit Values.........................................................   9

Taxes.......................................................................  11

Distribution of Contracts...................................................  15

Financial Statements........................................................  15
</TABLE>
    


                                      -2-
<PAGE>   61
                                SEPARATE ACCOUNT

      Variable Separate Account was originally established by the Anchor
National Life Insurance Company (the "Company") on June 25, 1981, pursuant to
the provisions of California law, as a segregated asset account of the Company.
The separate account meets the definition of a "separate account" under the
federal securities laws and is registered with the Securities and Exchange
Commission (the "SEC") as a unit investment trust under the Investment Company
Act of 1940. This registration does not involve supervision of the management of
the separate account or the Company by the SEC.

      The assets of the separate account are the property of the Company.
However, the assets of the separate account, equal to its reserves and other
contract liabilities, are not chargeable with liabilities arising out of any
other business the Company may conduct. Income, gains, and losses, whether or
not realized, from assets allocated to the separate account are credited to or
charged against the separate account without regard to other income, gains, or
losses of the Company.

      The separate account is divided into Variable Portfolios, with the assets
of each Variable Portfolio invested in the shares of one of the underlying
funds. The Company does not guarantee the investment performance of the separate
account, its Variable Portfolios or the underlying funds. Values allocated to
the separate account and the amount of variable Income Payments will vary with
the values of shares of the underlying funds, and are also reduced by contract
charges.

      The basic objective of a variable annuity contract is to provide variable
Income Payments which will be to some degree responsive to changes in the
economic environment, including inflationary forces and changes in rates of
return available from various types of investments. The contract is designed to
seek to accomplish this objective by providing that variable Income Payments
will reflect the investment performance of the separate account with respect to
amounts allocated to it both before and after the Annuity Date. Since the
separate account is always fully invested in shares of the underlying funds, its
investment performance reflects the investment performance of those entities.
The values of such shares held by the separate account fluctuate and are subject
to the risks of changing economic conditions as well as the risk inherent in the
ability of the underlying funds' managements to make necessary changes in their
Variable Portfolios to anticipate changes in economic conditions. Therefore, the
owner bears the entire investment risk that the basic objectives of the contract
may not be realized, and that the adverse effects of inflation may not be
lessened. There can be no assurance that the aggregate amount of variable Income
Payments will equal or exceed the Purchase Payments made with respect to a
particular account for the reasons described above, or because of the premature
death of an Annuitant.

      Another important feature of the contract related to its basic objective
is the Company's promise that the dollar amount of variable Income Payments made
during the lifetime of the Annuitant will not be adversely affected by the
actual mortality experience of the Company or by the actual expenses incurred by
the Company in excess of expense deductions provided for in the contract
(although the Company does not guarantee the amounts of the variable Income
Payments).

                                 GENERAL ACCOUNT

      The general account is made up of all of the general assets of the Company
other than those allocated to the separate account or any other segregated asset
account of the Company. A Purchase Payment may be allocated to the one-year
fixed investment option available in connection with the general account, as
elected by the owner at the time of purchasing a contract. Assets supporting
amounts allocated to fixed investment option become part of the Company's
general account assets and are available to fund the claims of all classes of
customers of the Company, as well as of its creditors. Accordingly, all of the
Company's assets held in the general account will be available to fund the
Company's obligations under the contracts as well as such other claims.

      The Company will invest the assets of the general account in the manner
chosen by the Company and allowed by applicable state laws regarding the nature
and quality of investments that


                                      -3-
<PAGE>   62
may be made by life insurance companies and the percentage of their assets that
may be committed to any particular type of investment. In general, these laws
permit investments, within specified limits and subject to certain
qualifications, in federal, state and municipal obligations, corporate bonds,
preferred and common stocks, real estate mortgages, real estate and certain
other investments.

                                PERFORMANCE DATA

      From time to time the separate account may advertise the Cash Management
Portfolio's "yield" and "effective yield." Both yield figures are based on
historical earnings and are not intended to indicate future performance. The
"yield" of the Cash Management Portfolio refers to the net income generated for
a contract funded by an investment in the Cash Management Portfolio (which
invests in shares of the Cash Management Portfolio of SunAmerica Trust) over a
seven-day period (which period will be stated in the advertisement). This income
is then "annualized." That is, the amount of income generated by the investment
during that week is assumed to be generated each week over a 52-week period and
is shown as a percentage of the investment. The "effective yield" is calculated
similarly but, when annualized, the income earned by an investment in the Cash
Management Portfolio is assumed to be reinvested at the end of each seven day
period. The "effective yield" will be slightly higher than the "yield" because
of the compounding effect of this assumed reinvestment. Neither the yield nor
the effective yield takes into consideration the effect of any capital changes
that might have occurred during the seven day period, nor do they reflect the
impact of premium taxes or any withdrawal charges. The impact of other recurring
charges on both yield figures is, however, reflected in them to the same extent
it would affect the yield (or effective yield) for a contract of average size.

      In addition, the separate account may advertise "total return" data for
its other Variable Portfolios. Like the yield figures described above, total
return figures are based on historical data and are not intended to indicate
future performance. The "total return" is a computed rate of return that, when
compounded annually over a stated period of time and applied to a hypothetical
initial investment in a Variable Portfolio made at the beginning of the period,
will produce the same contract value at the end of the period that the
hypothetical investment would have produced over the same period (assuming a
complete redemption of the contract at the end of the period). Recurring
contract charges are reflected in the total return figures in the same manner as
they are reflected in the yield data for contracts funded through the Cash
Management Portfolio. The effect of applicable withdrawal charges due to the
assumed redemption will be reflected in the return figures, but may be omitted
in additional return figures given for comparison.

      For periods starting prior to the date the contracts were first offered to
the public, the total return data for the Capital Appreciation, Growth, Natural
Resources and the Government and Quality Bond Portfolios of the separate account
will be derived from the performance of the corresponding underlying funds of
Anchor Trust, modified to reflect the charges and expenses as if the separate
account Variable Portfolio had been in existence since the inception date of
each respective Anchor Trust underlying fund. Thus, such performance figures
should not be construed to be actual historic performance of the relevant
separate account Variable Portfolio. Rather, they are intended to indicate the
historic performance of the four corresponding underlying funds of Anchor Trust,
adjusted to provide direct comparability to the performance of the Variable
Portfolios after the date the contracts were first offered to the public (which
will reflect the effect of fees and charges imposed under the contracts). The
Capital Appreciation, Growth, Natural Resources and Government and Quality Bond
underlying funds of Anchor Trust have served since their inception as underlying
investment media for separate accounts of other insurance companies in
connection with variable contracts not having the same fee and charge schedules
as those imposed under the contracts.

      Performance data for the various Variable Portfolios are computed in the
manner described below.


                                      -4-
<PAGE>   63

CASH MANAGEMENT PORTFOLIO

   
      The annualized current yield and the effective yield for the Cash
Management Portfolio for the 7 day period ending November 30, 1998 were
2.94% and 2.98%, respectively.
    

      Current yield is computed by first determining the Base Period Return
attributable to a hypothetical contract having a balance of one Accumulation
Unit at the beginning of a 7 day period using the formula:

   
            Base Period Return = (EV-SV-CMF)/(SV)

      where:

            SV  = value of one Accumulation Unit at the start of a 7 day period
            EV  = value of one Accumulation Unit at the end of the 7 day period
            CMF = an allocated portion of the $35 annual Contract
                  Maintenance Fee, prorated for 7 days

      The change in the value of an Accumulation Unit during the 7 day period
reflects the income received minus any expenses accrued, during such 7 day
period. The Contract Maintenance Fee (CMF) is first allocated among the
Variable Portfolios and the general account so that each Variable Portfolio's
allocated portion of the fee is proportional to the percentage of the number
of accounts that have money allocated to that Variable Portfolio. The charge is
further reduced, for purposes of the yield computation, by multiplying it by the
ratio that the value of the hypothetical contract bears to the value of an
account of average size for contracts funded by the Cash Management Portfolio.
Finally, as is done with the other charges discussed above, the result is
multiplied by the fraction 7/365 to arrive at the portion attributable to the 7
day period.
    

      The current yield is then obtained by annualizing the Base Period Return:

            Current Yield = (Base Period Return) x (365/7)

      The Cash Management Portfolio also quotes an "effective yield" that
differs from the current yield given above in that it takes into account the
effect of dividend reinvestment in the underlying fund. The effective yield,
like the current yield, is derived from the Base Period Return over a 7 day
period. However, the effective yield accounts for dividend reinvestment by
compounding the current yield according to the formula:

            Effective Yield = [(Base Period Return + 1)365/7 - 1].

      Net investment income for yield quotation purposes will not include either
realized capital gains and losses or unrealized appreciation and depreciation,
whether reinvested or not. The yield quotations also do not reflect any impact
of premium taxes, transfer fees, or withdrawal charges.

      The yield quoted should not be considered a representation of the yield of
the Cash Management Portfolio in the future since the yield is not fixed. Actual
yields will depend not only on the type, quality and maturities of the
investments held by the underlying fund and changes in interest rates on such
investments, but also on factors such as an owner's account size (since the
impact of fixed dollar charges will be greater for small accounts than for
larger accounts).

      Yield information may be useful in reviewing the performance of the Cash
Management Portfolio and for providing a basis for comparison with other
investment alternatives. However, the


                                      -5-
<PAGE>   64
Cash Management Portfolio's yield fluctuates, unlike bank deposits or other
investments that typically pay a fixed yield for a stated period of time.

OTHER VARIABLE PORTFOLIOS

      The Variable Portfolios of the separate account other than the Cash
Management Portfolio compute their performance data as "total return".

      The total returns of the various Variable Portfolios for 1 year and since
each Variable Portfolio's inception date are shown below, both with and without
an assumed complete redemption at the end of the period.
   
                      TOTAL ANNUAL RETURN (IN PERCENT) FOR
                       PERIOD ENDING ON NOVEMBER 30, 1998
                        (RETURN WITH/WITHOUT REDEMPTION)
    

   
<TABLE>
<CAPTION>
                                                  INCEPTION                                                      SINCE
               VARIABLE PORTFOLIO                   DATE                1 YEAR               5 YEAR            INCEPTION
   ----------------------------------------       ---------             ------               ------            ---------
<S>                                               <C>                 <C>                      <C>             <C>

   Capital Appreciation                           2/12/93              4.56/11.56          15.95/16.28         15.83/16.00
   Growth                                         2/19/93             13.14/20.14          17.39/17.71         16.46/16.63
   Natural Resources                              10/31/94          (23.66)/(16.66)         0.18/0.77         (2.71)/(1.92)
   Government & Quality Bond                      2/22/93              0.90/7.90            5.22/5.71           5.22/5.49
   Aggressive Growth                              6/3/96              (4.00)/3.00              N/A              5.18/7.02
   International Diversified Equities             10/31/94             9.44/16.44              N/A              7.00/7.59
   Global Equities                                2/9/93               6.57/13.57          11.65/12.03         11.62/11.83
   Putnam Growth                                  2/9/93              13.63/20.63          17.20/17.52         14.55/14.73
   MFS Growth and Income*                         2/9/93               8.99/15.99          13.54/13.90         12.86/13.05
   Alliance Growth                                2/9/93              26.84/33.84          24.64/24.89         22.51/22.64
   "Dogs" of Wall Street                          4/1/98                   N/A                 N/A            (9.91)/(2.91)
   Venture Value                                  10/31/94             2.64/9.64               N/A             22.66/23.05
   Federated Value                                6/3/96               9.40/16.40              N/A             18.73/20.27
   Growth-Income                                  2/9/93              13.06/20.06          19.34/19.64         17.45/17.60
   Utility                                        6/3/96               7.14/14.14              N/A             14.57/16.20
   Asset Allocation                               7/1/93             (5.74)/1.26           11.67/12.05         11.43/11.66
   MFS Total Return**                             10/31/94             4.77/11.77              N/A             13.74/14.23
   SunAmerica Balanced                            6/3/96              10.97/17.97              N/A             17.93/19.48
   Worldwide High Income                          10/31/94          (22.14)/(15.14)            N/A              7.08/7.67
   High-Yield Bond                                2/9/93             (9.83)/(2.83)          4.81/5.31           5.97/6.23
   Corporate Bond                                 7/1/93             (2.15)/4.85            4.81/5.31           4.81/5.10
   Global Bond                                    7/1/93               2.98/9.98            6.50/6.96           6.60/6.88
   Emerging Markets                               6/2/97            (30.12)/(23.12)            N/A           (32.77)/(27.96)
   International Growth and Income                6/2/97               .90/7.90                N/A              3.63/7.53
   Real Estate                                    6/2/97            (21.46)/(14.46)            N/A            (5.52)/(1.43)
</TABLE>
    
- -----------------
   
 * Formerly named Growth/Phoenix and managed by Phoenix Investment Counsel, Inc.

** Formerly named Balanced/Phoenix and managed by Phoenix Investment Counsel,
   Inc.
    
   Total return figures are based on historical data and are not intended to
   indicate future performance.


                                      -6-
<PAGE>   65

      Total return for a Variable Portfolio represents a single computed annual
rate of return that, when compounded annually over the time period shown and
applied to a hypothetical initial investment in a contract funded by that
Variable Portfolio made at the beginning of the period, will produce the same
contract value at the end of the period that the hypothetical investment would
have produced over the same period. The total rate of return (T) is computed so
that it satisfies the formula:

            P(1+T)n = ERV

      where:  P  = a hypothetical initial payment of $1,000
              T  = average annual total return
              n  = number of years

            ERV  = ending redeemable value of a hypothetical $1,000 payment
                   made at the beginning of the 1, 5, or 10 year period as of
                   the end of the period (or fractional portion thereof).

   
      The total return figures reflect the effect of both nonrecurring and
recurring charges, as discussed herein. Recurring charges are taken into account
in a manner similar to that used for the yield computations for the Cash
Management Portfolio, described above. The applicable withdrawal charge (if any)
is deducted as of the end of the period, to reflect the effect of the assumed
complete redemption. Because the impact of Contract Maintenance Fees on a
particular account will generally differ from that assumed in the computation,
due to differences between most actual allocations and the assumed one, as well
as differences due to varying account sizes, the total return experienced by an
actual Variable Portfolio over the same time periods would generally have been
different from those produced by the computation. As with the Cash Management
Portfolio yield figures, total return figures are derived from historical data
and are not intended to be a projection of future performance.
    

                                 INCOME PAYMENTS

INITIAL MONTHLY INCOME PAYMENTS

      The initial Income Payment is determined by applying separately that
portion of the contract value allocated to the fixed investment option and the
Variable Portfolio(s), less any premium tax, and then applying it to the annuity
table specified in the contract for fixed and variable Income Payments. Those
tables are based on a set amount per $1,000 of proceeds applied. The appropriate
rate must be determined by the sex (except where, as in the case of certain
Qualified contracts and other employer-sponsored retirement plans, such
classification is not permitted) and age of the Annuitant and designated second
person, if any.

      The dollars applied are then divided by 1,000 and the result multiplied by
the appropriate annuity factor appearing in the table to compute the amount of
the first monthly Income Payment. In the case of a variable annuity, that amount
is divided by the value of an Annuity Unit as of the Annuity Date to establish
the number of Annuity Units representing each variable Income Payment. The
number of Annuity Units determined for the first variable Income Payment remains
constant for the second and subsequent monthly variable Income Payments,
assuming that no reallocation of contract values is made.

SUBSEQUENT MONTHLY PAYMENTS

      For fixed Income Payments, the amount of the second and each subsequent
monthly Income Payment is the same as that determined above for the first
monthly payment.


                                      -7-
<PAGE>   66

      For variable Income Payments, the amount of the second and each subsequent
monthly Income Payment is determined by multiplying the number of Annuity Units,
as determined in connection with the determination of the initial monthly
payment, above, by the Annuity Unit value as of the day preceding the date on
which each Income Payment is due.

                               ANNUITY UNIT VALUES

      The value of an Annuity Unit is determined independently for each Variable
Portfolio.

      The annuity tables contained in the contract are based on a 3.5% per annum
assumed investment rate. If the actual net investment rate experienced by a
Variable Portfolio exceed 3.5%, variable Income Payments derived from
allocations to that Variable Portfolio will increase over time. Conversely, if
the actual rate is less than 3.5%, variable Income Payments will decrease over
time. If the net investment rate equals 3.5%, the variable Income Payments will
remain constant. If a higher assumed investment rate had been used, the initial
monthly payment would be higher, but the actual net investment rate would also
have to be higher in order for Income Payments to increase (or not to decrease).

      The payee receives the value of a fixed number of Annuity Units each
month. The value of a fixed number of Annuity Units will reflect the investment
performance of the Variable Portfolios elected, and the amount of each Income
Payment will vary accordingly.

      For each Variable Portfolio, the value of an Annuity Unit is determined by
multiplying the Annuity Unit value for the preceding month by the Net Investment
Factor for the month for which the Annuity Unit value is being calculated. The
result is then multiplied by a second factor which offsets the effect of the
assumed net investment rate of 3.5% per annum which is assumed in the annuity
tables contained in the contract.

NET INVESTMENT FACTOR

      The Net Investment Factor ("NIF") is an index applied to measure the net
investment performance of a Variable Portfolio from one day to the next. The NIF
may be greater or less than or equal to one; therefore, the value of an Annuity
Unit may increase, decrease or remain the same.

      The NIF for any Variable Portfolio for a certain month is determined by
dividing (a) by (b) where:

      (a)   is the Accumulation Unit value of the Variable Portfolio determined
            as of the end of that month, and

      (b)   is the Accumulation Unit value of the Variable Portfolio determined
            as of the end of the preceding month.

      The NIF for a Variable Portfolio for a given month is a measure of the net
investment performance of the Variable Portfolio from the end of the prior month
to the end of the given month. A NIF of 1.000 results from no change in the
value of the Variable Portfolio; a NIF greater than 1.000 results from an
increase in the value of the Variable Portfolio; and a NIF less than 1.000
results from a decrease in the value of the Variable Portfolio. The NIF is
increased (or decreased) in accordance with the increases (or decreases,
respectively) in the value of a share of the underlying fund in which the
Variable Portfolio invests; it is also reduced by separate account asset
charges.

      Illustrative Example

      Assume that one share of a given Variable Portfolio had an Accumulation
Unit value of


                                      -8-
<PAGE>   67

$11.46 as of the close of the New York Stock Exchange ("NYSE") on the last
business day in September; that its Accumulation Unit value had been $11.44 at
the close of the NYSE on the last business day at the end of the previous month.
The NIF for the month of September is:

                  NIF = ($11.46/$11.44)

                      =  1.00174825

      Illustrative Example

      The change in Annuity Unit value for a Variable Portfolio from one month
to the next is determined in part by multiplying the Annuity Unit value at the
prior month end by the NIF for that Variable Portfolio for the new month. In
addition, however, the result of that computation must also be multiplied by an
additional factor that takes into account, and neutralizes, the assumed
investment rate of 3.5 percent per annum upon which the Income Payment tables
are based. For example, if the net investment rate for a Variable Portfolio
(reflected in the NIF) were equal to the assumed investment rate, the variable
Income Payments should remain constant (i.e., the Annuity Unit value should not
change). The monthly factor that neutralizes the assumed investment rate of 3.5
percent per annum is:

            1/[(1.035)(1/12)] = 0.99713732

      In the example given above, if the Annuity Unit value for the Variable
Portfolio was $10.103523 on the last business day in August, the Annuity Unit
value on the last business day in September would have been:

            $10.103523 x 1.00174825 x 0.99713732 = $10.092213

VARIABLE INCOME PAYMENTS

      Illustrative Example

      Assume that a male owner, P, owns a contract in connection with which P
has allocated all of his contract value to a single Variable Portfolio. P is
also the sole Annuitant and, at age 60, has elected to annuitize his contract
under Option 4, a Life Annuity With 120 Monthly Payments Guaranteed. As of the
last valuation preceding the Annuity Date, P's Account was credited with
7543.2456 Accumulation Units each having a value of $15.432655, (i.e., P's
account value is equal to 7543.2456 x $15.432655 = $116,412.31). Assume also
that the Annuity Unit value for the Variable Portfolio on that same date is
$13.256932, and that the Annuity Unit value on the day immediately prior to the
second Income Payment date is $13.327695.

      P's first variable Income Payment is determined from the annuity rate
tables in P's contract, using the information assumed above. From the tables,
which supply monthly Income Payments for each $1,000 of applied contract value,
P's first variable Income Payment is determined by multiplying the monthly
installment of $5.42 (Option 4 tables, male Annuitant age 60 at the Annuity
Date) by the result of dividing P's account value by $1,000:

           First Payment = $5.42 x ($116,412.31/$1,000) = $630.95

      The number of P's Annuity Units (which will be fixed; i.e., it will not
change unless he transfers his Account to another Account) is also determined at
this time and is equal to the amount of the first variable Income Payment
divided by the value of an Annuity Unit on the day immediately prior to
annuitization:

           Annuity Units = $630.95/$13.256932 = 47.593968

      P's second variable Income Payment is determined by multiplying the number
of Annuity


                                      -9-
<PAGE>   68

Units by the Annuity Unit value as of the day immediately prior to the second
payment due date:

           Second Payment = 47.593968 x $13.327695 = $634.32

      The third and subsequent variable Income Payments are computed in a manner
similar to the second variable Income Payment.

      Note that the amount of the first variable Income Payment depends on the
contract value in the relevant Variable Portfolio on the Annuity Date and thus
reflects the investment performance of the Variable Portfolio net of fees and
charges during the Accumulation Phase. The amount of that payment determines the
number of Annuity Units, which will remain constant during the Income Phase
(assuming no transfers from the Variable Portfolio). The net investment
performance of the Variable Portfolio during the Income Phase is reflected in
continuing changes during this phase in the Annuity Unit value, which determines
the amounts of the second and subsequent variable Income Payments.

                                      TAXES

GENERAL

      Section 72 of the Internal Revenue Code of 1986, as amended (the "Code")
governs taxation of annuities in general. An owner is not taxed on increases in
the value of a contract until distribution occurs, either in the form of a
non-annuity distribution or as income payments under the annuity option elected.
For a lump sum payment received as a total surrender (total redemption), the
recipient is taxed on the portion of the payment that exceeds the cost basis of
the contract. For a payment received as a withdrawal (partial redemption),
federal tax liability is determined on a last-in, first-out basis, meaning
taxable income is withdrawn before the cost basis of the contract is withdrawn.
For contracts issued in connection with Non-qualified plans, the cost basis is
generally the Purchase Payments, while for contracts issued in connection with
Qualified plans there may be no cost basis. The taxable portion of the lump sum
payment is taxed at ordinary income tax rates. Tax penalties may also apply.

      For income payments, the taxable portion is determined by a formula which
establishes the ratio that the cost basis of the contract bears to the total
value of income payments for the term of the annuity contract. The taxable
portion is taxed at ordinary income tax rates. Owners, Annuitants and
Beneficiaries under the contracts should seek competent financial advice about
the tax consequences of distributions under the retirement plan under which the
contracts are purchased.

      The Company is taxed as a life insurance company under the Code. For
federal income tax purposes, the separate account is not a separate entity from
the Company and its operations form a part of the Company.

WITHHOLDING TAX ON DISTRIBUTIONS

      The Code generally requires the Company (or, in some cases, a plan
administrator) to withhold tax on the taxable portion of any distribution or
withdrawal from a contract. For "eligible rollover distributions" from contracts
issued under certain types of Qualified plans, 20% of the distribution must be
withheld, unless the payee elects to have the distribution "rolled over" to
another eligible plan in a direct "trustee to trustee" transfer. This
requirement is mandatory and cannot be waived by the owner. Withholding on other
types of distributions can be waived.

      An "eligible rollover distribution" is the estimated taxable portion of
any amount received by a covered employee from a plan qualified under Section
401(a) or 403(a) of the Code, or from a tax-sheltered annuity qualified under
Section 403(b) of the Code (other than (1) income payments for the


                                      -10-
<PAGE>   69
life (or life expectancy) of the employee, or joint lives (or joint life
expectancies) of the employee and his or her designated Beneficiary, or for a
specified period of ten years or more; and (2) distributions required to be made
under the Code). Failure to "roll over" the entire amount of an eligible
rollover distribution (including an amount equal to the 20% portion of the
distribution that was withheld) could have adverse tax consequences, including
the imposition of a penalty tax on premature withdrawals, described later in
this section.

      Withdrawals or distributions from a contract other than eligible rollover
distributions are also subject to withholding on the estimated taxable portion
of the distribution, but the owner may elect in such cases to waive the
withholding requirement. If not waived, withholding is imposed (1) for periodic
payments, at the rate that would be imposed if the payments were wages, or (2)
for other distributions, at the rate of 10%. If no withholding exemption
certificate is in effect for the payee, the rate under (1) above is computed by
treating the payee as a married individual claiming 3 withholding exemptions.

DIVERSIFICATION - SEPARATE ACCOUNT INVESTMENTS

      Section 817(h) of the Code imposes certain diversification standards on
the underlying assets of variable annuity contracts. The Code provides that a
variable annuity contract will not be treated as an annuity contract for any
period (and any subsequent period) for which the investments are not adequately
diversified, in accordance with regulations prescribed by the United States
Treasury Department ("Treasury Department"). Disqualification of the contract as
an annuity contract would result in imposition of federal income tax to the
owner with respect to earnings allocable to the contract prior to the receipt of
payments under the contract. The Code contains a safe harbor provision which
provides that annuity contracts such as the contracts meet the diversification
requirements if, as of the close of each calendar quarter, the underlying assets
meet the diversification standards for a regulated investment company, and no
more than 55% of the total assets consist of cash, cash items, U.S. government
securities and securities of other regulated investment companies.

      The Treasury Department has issued regulations which establish
diversification requirements for the investment portfolios underlying variable
contracts such as the contracts. The regulations amplify the diversification
requirements for variable contracts set forth in the Code and provide an
alternative to the safe harbor provision described above. Under the regulations
an investment portfolio will be deemed adequately diversified if (1) no more
than 55% of the value of the total assets of the portfolio is represented by any
one investment; (2) no more than 70% of the value of the total assets of the
portfolio is represented by any two investments; (3) no more than 80% of the
value of the total assets of the portfolio is represented by any three
investments; and (4) no more than 90% of the value of the total assets of the
portfolio is represented by any four investments. For purposes of determining
whether or not the diversification standards imposed on the underlying assets of
variable contracts by Section 817(h) of the Code have been met, "each United
States government agency or instrumentality shall be treated as a separate
issuer."

MULTIPLE CONTRACTS

      Multiple annuity contracts which are issued within a calendar year to the
same contract owner by one company or its affiliates are treated as one annuity
contract for purposes of determining the tax consequences of any distribution.
Such treatment may result in adverse tax consequences including more rapid
taxation of the distributed amounts from such multiple contracts. The Company
believes that Congress intended to affect the purchase of multiple deferred
annuity contracts which may have been purchased to avoid withdrawal income tax
treatment. Owners should consult a tax adviser prior to purchasing more than one
annuity contract in any calendar year.

TAX TREATMENT OF ASSIGNMENTS

      An assignment of a contract may have tax consequences, and may also be
prohibited by


                                      -11-
<PAGE>   70

ERISA in some circumstances. Owners should therefore consult competent legal
advisers should they wish to assign their contracts.

QUALIFIED PLANS

      The contracts offered by this prospectus are designed to be suitable for
use under various types of Qualified plans. Taxation of owners in each Qualified
plan varies with the type of plan and terms and conditions of each specific
plan. Owners, Annuitants and Beneficiaries are cautioned that benefits under a
Qualified plan may be subject to the terms and conditions of the plan,
regardless of the terms and conditions of the contracts issued pursuant to the
plan.

      Following are general descriptions of the types of Qualified plans with
which the contracts may be used. Such descriptions are not exhaustive and are
for general information purposes only. The tax rules regarding Qualified plans
are very complex and will have differing applications depending on individual
facts and circumstances. Each purchaser should obtain competent tax advice prior
to purchasing a contract issued under a Qualified plan.

      Contracts issued pursuant to Qualified plans include special provisions
restricting contract provisions that may otherwise be available and described in
this prospectus. Generally, contracts issued pursuant to Qualified plans are not
transferable except upon surrender or annuitization. Various penalty and excise
taxes may apply to contributions or distributions made in violation of
applicable limitations. Furthermore, certain withdrawal penalties and
restrictions may apply to surrenders from Qualified contracts.

      (A)   H.R. 10 Plans

            Section 401 of the Code permits self-employed individuals to
establish Qualified plans for themselves and their employees, commonly referred
to as "H.R. 10" or "Keogh" Plans. Contributions made to the plan for the benefit
of the employees will not be included in the gross income of the employees until
distributed from the plan. The tax consequences to owners may vary depending
upon the particular plan design. However, the Code places limitations and
restrictions on all plans and such items as: amounts of allowable contributions;
form, manner and timing of distributions; vesting and nonforfeitability of
interests; nondiscrimination in eligibility and participation; and the tax
treatment of distributions, withdrawals and surrenders.

      (B)   Tax-Sheltered Annuities

            Section 403(b) of the Code permits the purchase of "tax-sheltered
annuities" by public schools and certain charitable, educational and scientific
organizations described in Section 501(c)(3) of the Code. These qualifying
employers may make contributions to the contracts for the benefit of their
employees. Such contributions are not includible in the gross income of the
employee until the employee receives distributions from the contract. The amount
of contributions to the tax-sheltered annuity is limited to certain maximums
imposed by the Code. Furthermore, the Code sets forth additional restrictions
governing such items as transferability, distributions, nondiscrimination and
withdrawals.

      (C)   Individual Retirement Annuities

            Section 408(b) of the Code permits eligible individuals to
contribute to an individual retirement program known as an "Individual
Retirement Annuity" ("IRA"). Under applicable limitations, certain amounts may
be contributed to an IRA which will be deductible from the individual's gross
income. These IRAs are subject to limitations on eligibility, contributions,
transferability and distributions. Sales of contracts for use with IRAs are
subject to special requirements imposed by the Code, including the requirement
that certain informational disclosure be given to persons desiring to establish
an IRA.


                                      -12-
<PAGE>   71
      (D)   Roth IRAs

            Section 408(a) of the Code permits an individual to contribute to an
individual retirement program called a Roth IRA. Unlike contributions to a
regular IRA under Section 408(b) of the Code, contributions to a Roth IRA are
not made on a tax-deferred basis, but distributions are tax-free if certain
requirements are satisfied. Like regular IRAs, Roth IRAs are subject to
limitations on the amount that may be contributed, those who may be eligible and
the time when distributions may commence without tax penalty. Certain persons
may be eligible to convert a regular IRA into a Roth IRA, and the taxes on the
resulting income may be spread over four years if the conversion occurs before
January 1, 1999. If and when contracts are made available for use with Roth
IRAs, they may be subject to special requirements imposed by the Internal
Revenue Service ("IRS"). Purchasers of the contracts for this purpose will be
provided with such supplementary information as may be required by the IRS or
other appropriate agency.

      (E)   Corporate Pension and Profit-Sharing Plans

            Section 401(a) and 401(k) of the Code permit corporate employers to
establish various types of retirement plans for employees. These retirement
plans may permit the purchase of the contracts to provide benefits under the
plan. Contributions to the plan for the benefit of employees will not be
includible in the gross income of the employee until distributed from the plan.
The tax consequences to owners may vary depending upon the particular plan
design. However, the Code places limitations on all plans on such items as
amount of allowable contributions; form, manner and timing of distributions;
vesting and nonforfeitability of interest; nondiscrimination in eligibility and
participation; and the tax treatment of distributions, withdrawals and
surrenders.

      (F)   Deferred Compensation Plans - Section 457

            Under Section 457 of the Code, governmental and certain other
tax-exempt employers may establish, for the benefit of their employees, deferred
compensation plans which may invest in annuity contracts. The Code, as in the
case of Qualified plans, establishes limitations and restrictions on
eligibility, contributions and distributions. Under these plans, contributions
made for the benefit of the employees will not be includible in the employees'
gross income until distributed from the plan. However, under a 457 plan all the
plan assets shall remain solely the property of the employer, subject only to
the claims of the employer's general creditors until such time as made available
to an owner or a Beneficiary.

                            DISTRIBUTION OF CONTRACTS

      Effective as of August 6, 1993, SunAmerica Capital Services, Inc., located
at 733 Third Avenue, 4th Floor, New York, New York 10017, serves as the
distributor of the contracts pursuant to a distribution agreement. Prior to this
date SunAmerica Securities, Inc. and Royal Alliance Associates, Inc., both
affiliates of SunAmerica Capital Services, Inc. and located at 2201 East
Camelback Road, Phoenix, Arizona 85016 and 733 Third Avenue, 4th Floor, New
York, New York 10017, respectively, served as co-distributors of the contracts.
SunAmerica Capital Services, Inc., SunAmerica Securities, Inc. and Royal
Alliance Associates, Inc. are each an indirect wholly-owned subsidiary of
SunAmerica Inc. and each is registered as a broker-dealer under the Securities
Exchange Act of 1934, as amended, and is a member of the National Association of
Securities Dealers, Inc.

   
      For the year ended November 30, 1998, the aggregate amount of underwriting
commissions paid by the Company to SunAmerica Capital Services, Inc. was
$12,886,273 of which $1,288,627 was retained by it. For the year ended 
November 30, 1997, the aggregate
    


                                      -13-
<PAGE>   72
amount of underwriting commissions paid by the Company to SunAmerica Capital
Services, Inc. was $37,387,377, of which $3,799,597 was retained by them. For
the year ended November 30, 1996, the aggregate amount of underwriting
commissions paid by the Company to SunAmerica Capital Services, Inc. was
$36,909,230, of which $3,757,245 was retained by them.

      Contracts are offered on a continuous basis.

                              FINANCIAL STATEMENTS

   
      The audited consolidated financial statements of the Company as of
September 30, 1998 and 1997 and for each of the three years in the period ended
September 30, 1998 are presented in the prospectus. The consolidated financial
statements of the Company should be considered only as bearing on the ability of
the Company to meet its obligation under the contracts for amounts allocated to
the 1, 3, 5, 7 or 10 year fixed investment options. The financial statements of
Variable Separate Account (Portion Relating to the POLARIS Variable Annuity) as
of November 30, 1997 and for each of the two years in the period ended November
30, 1997, are included in this Statement of Additional Information.
    

      PricewaterhouseCoopers LLP, 400 South Hope Street, Los Angeles, California
90071, serves as the independent accountants for the separate account and the
Company. The financial statements referred to above have been so included in
reliance on the reports of PricewaterhouseCoopers LLP, independent accountants,
given on the authority of said firm as experts in auditing and accounting.

    
   
    


                                      -14-
<PAGE>   73
                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)

                                       OF

                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                              FINANCIAL STATEMENTS

                                NOVEMBER 30, 1997



                                      -17-
<PAGE>   74







                        REPORT OF INDEPENDENT ACCOUNTANTS


January 27, 1998



To the Board of Directors of Anchor National Life Insurance Company
and the Contractholders of its separate account,
Variable Separate Account (Portion Relating to the POLARIS Variable Annuity)


In our opinion, the accompanying statement of net assets, including the schedule
of portfolio investments, and the related statements of operations and of
changes in net assets present fairly, in all material respects, the financial
position of each of the Variable Accounts constituting Variable Separate Account
(Portion Relating to the POLARIS Variable Annuity), a separate account of Anchor
National Life Insurance Company (the "Separate Account") at November 30, 1997,
the results of their operations for the year then ended, and the changes in
their net assets for the two years then ended, in conformity with generally
accepted accounting principles. These financial statements are the
responsibility of the Separate Account's management; our responsibility is to
express an opinion on these financial statements based on our audits. We
conducted our audits of these financial statements in accordance with generally
accepted auditing standards which 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, assessing
the accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits, which included confirmation of securities owned at November 30, 1997 by
correspondence with the custodian, provide a reasonable basis for the opinion
expressed above.



                                      -18-
<PAGE>   75

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF NET ASSETS
                                November 30, 1997


<TABLE>
<CAPTION>
                                                                                Government International
                                          Capital                    Natural           and   Diversified        Global   Aggressive
                                     Appreciation        Growth    Resources  Quality Bond      Equities      Equities       Growth
                                        Portfolio     Portfolio    Portfolio     Portfolio     Portfolio     Portfolio    Portfolio
                                   -----------------------------------------------------------------------------------------------
<S>                                  <C>           <C>           <C>          <C>           <C>           <C>           <C>
Assets:
  Investments in Anchor
    Series Trust,
    at market value                  $529,028,394  $197,994,732  $32,713,772  $127,144,553  $          0  $          0  $         0

  Investments in SunAmerica
    Series Trust,
    at market value                             0             0            0             0   209,218,279   310,582,513   83,032,896

Liabilities                                     0             0            0             0             0             0            0
                                     ----------------------------------------------------------------------------------------------

Net Assets                           $529,028,394  $197,994,732  $32,713,772  $127,144,553  $209,218,279  $310,582,513  $83,032,896
                                     ==============================================================================================


Accumulation units outstanding         24,889,133     9,747,428    2,937,198    10,047,042    18,010,557    18,376,185    7,215,024
                                     ==============================================================================================

Unit value of accumulation units           $21.26        $20.31       $11.14        $12.65        $11.62        $16.90       $11.51
                                     ==============================================================================================
</TABLE>



                 See accompanying notes to financial statements.


                                      -19-
<PAGE>   76

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF NET ASSETS
                                November 30, 1997
                                   (Continued)

<TABLE>
<CAPTION>
                                                                           Growth/Phoenix
                                        Venture    Federated         Putnam    Investment      Alliance       Growth-         Asset
                                          Value        Value         Growth       Counsel        Growth        Income    Allocation
                                      Portfolio    Portfolio      Portfolio     Portfolio     Portfolio     Portfolio     Portfolio
                                   ------------------------------------------------------------------------------------------------
<S>                                <C>           <C>           <C>           <C>           <C>           <C>           <C>
Assets:
  Investments in Anchor
    Series Trust,
    at market value                $          0  $         0   $          0  $          0  $          0  $          0  $          0

  Investments in SunAmerica
    Series Trust,
    at market value                 956,188,606   42,154,698    209,401,610   206,547,066   589,392,040   530,761,442   454,509,449

Liabilities                                   0            0              0             0             0             0             0
                                   ------------------------------------------------------------------------------------------------

Net Assets                         $956,188,606  $42,154,698   $209,401,610  $206,547,066  $589,392,040  $530,761,442  $454,509,449
                                   ================================================================================================


Accumulation units outstanding       44,892,446    3,095,513     11,336,732    11,714,450    24,050,697    24,795,824    25,272,776
                                   ================================================================================================

Unit value of accumulation units         $21.30       $13.62         $18.47        $17.63        $24.51        $21.41        $17.98
                                   ================================================================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -20-
<PAGE>   77

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF NET ASSETS
                                November 30, 1997
                                   (Continued)


<TABLE>
<CAPTION>
                                               Balanced/Phoenix
                                    SunAmerica       Investment                  Worldwide    High-Yield       Global    Corporate
                                      Balanced          Counsel      Utility   High Income          Bond         Bond         Bond
                                     Portfolio        Portfolio    Portfolio     Portfolio     Portfolio    Portfolio    Portfolio
                                   -----------------------------------------------------------------------------------------------
<S>                                <C>              <C>          <C>          <C>           <C>           <C>          <C>
Assets:
  Investments in Anchor
    Series Trust,
    at market value                $         0      $         0  $         0  $          0  $          0  $         0  $         0

  Investments in SunAmerica
    Series Trust,
    at market value                 32,359,325       83,649,784   19,644,306   101,734,353   167,745,561   80,654,148   53,099,569

Liabilities                                  0                0            0             0             0            0            0
                                   -----------------------------------------------------------------------------------------------

Net Assets                         $32,359,325      $83,649,784  $19,644,306  $101,734,353  $167,745,561  $80,654,148  $53,099,569
                                   ===============================================================================================

Accumulation units outstanding       2,447,948        5,415,312    1,541,346     6,368,247    11,443,250    6,164,455    4,235,990
                                   ===============================================================================================

Unit value of accumulation units        $13.22           $15.45       $12.74        $15.98        $14.66       $13.08       $12.54
                                   ===============================================================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -21-
<PAGE>   78


                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF NET ASSETS
                                November 30, 1997
                                   (Continued)


<TABLE>
<CAPTION>
                                                 International     Emerging         Real          Cash
                                               Growth & Income      Markets       Estate    Management
                                                     Portfolio    Portfolio    Portfolio     Portfolio           TOTAL
                                               -----------------------------------------------------------------------
<S>                                                <C>          <C>          <C>          <C>           <C>           
Assets:
  Investments in Anchor
    Series Trust,
    at market value                                $         0  $         0  $         0  $          0  $  886,881,451

  Investments in SunAmerica
    Series Trust,
    at market value                                 28,115,381   13,964,137   18,681,133   128,314,920   4,319,751,216

Liabilities                                                  0            0            0             0               0
                                               -----------------------------------------------------------------------

Net Assets                                         $28,115,381  $13,964,137  $18,681,133  $128,314,920  $5,206,632,667
                                               =======================================================================

Accumulation units outstanding                       2,721,228    1,751,922    1,632,804    11,224,451
                                               =======================================================

Unit value of accumulation units                        $10.33       $ 7.97       $11.44        $11.43
                                               =======================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -22-
<PAGE>   79

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                        SCHEDULE OF PORTFOLIO INVESTMENTS
                                November 30, 1997


<TABLE>
<CAPTION>
                                                                   Market Value          Market
Variable Accounts                                       Shares        Per Share            Value             Cost
- -----------------------------------------------------------------------------------------------------------------
<S>                                                 <C>                  <C>        <C>              <C>
ANCHOR SERIES TRUST:
  Capital Appreciation Portfolio                    16,780,052           $31.53     $529,028,394     $459,565,512
  Growth Portfolio                                   7,412,595            26.71      197,994,732      169,377,008
  Natural Resources Portfolio                        2,245,829            14.57       32,713,772       36,654,252
  Government and Quality Bond Portfolio              9,186,050            13.84      127,144,553      127,749,079
                                                                                  -------------------------------
                                                                                     886,881,451      793,345,851
                                                                                  -------------------------------
SUNAMERICA SERIES TRUST:
  International Diversified Equities Portfolio      18,463,464            11.33      209,218,279      199,016,575
  Global Equities Portfolio                         19,437,721            15.98      310,582,513      258,023,274
  Aggressive Growth Portfolio                        7,061,642            11.76       83,032,896       74,377,265
  Venture Value Portfolio                           44,547,485            21.47      956,188,606      695,675,284
  Federated Value Portfolio                          3,033,452            13.90       42,154,698       35,800,223
  Putnam Growth Portfolio                           10,935,174            19.15      209,401,610      134,998,693
  Growth/Phoenix Investment Counsel Portfolio       13,223,669            15.62      206,547,066      152,526,676
  Alliance Growth Portfolio                         26,121,497            22.56      589,392,040      441,177,387
  Growth-Income Portfolio                           25,496,652            20.82      530,761,442      366,719,261
  Asset Allocation Portfolio                        28,040,249            16.21      454,509,449      349,477,716
  SunAmerica Balanced Portfolio                      2,405,912            13.45       32,359,325       27,781,930
  Balanced/Phoenix Investment Counsel Portfolio      5,671,291            14.75       83,649,784       69,823,291
  Utility Portfolio                                  1,521,334            12.91       19,644,306       17,028,195
  Worldwide High Income Portfolio                    7,707,286            13.20      101,734,353       94,844,674
  High-Yield Bond Portfolio                         14,192,285            11.82      167,745,561      152,811,050
  Global Bond Portfolio                              7,005,103            11.51       80,654,148       73,746,199
  Corporate Bond Portfolio                           4,600,337            11.54       53,099,569       48,668,920
  International Growth & Income Portfolio            2,700,805            10.41       28,115,381       27,902,919
  Emerging Markets Portfolio                         1,738,829             8.03       13,964,137       17,212,561
  Real Estate Portfolio                              1,620,595            11.53       18,681,133       17,498,200
  Cash Management Portfolio                         11,952,413            10.74      128,314,920      127,260,191
                                                                                  -------------------------------
                                                                                   4,319,751,216    3,382,370,484
                                                                                  -------------------------------
                                                                                  $5,206,632,667   $4,175,716,335
                                                                                  ===============================
</TABLE>


                 See accompanying notes to financial statements.

                                      -23-
<PAGE>   80

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF OPERATIONS
                               FOR THE YEAR ENDED
                                November 30, 1997


<TABLE>
<CAPTION>
                                                                               Government International
                                         Capital                    Natural           and   Diversified        Global    Aggressive
                                    Appreciation        Growth    Resources  Quality Bond      Equities      Equities        Growth
                                       Portfolio     Portfolio    Portfolio     Portfolio     Portfolio     Portfolio     Portfolio
                                   ------------------------------------------------------------------------------------------------
<S>                                <C>            <C>           <C>          <C>           <C>           <C>           <C>
Investment income:
  Dividends and capital
    gains distributions            $  44,098,428  $ 19,777,512  $ 2,306,553  $  8,098,656  $  6,295,820  $ 14,147,538  $     38,952
                                   ------------------------------------------------------------------------------------------------

      Total investment income         44,098,428    19,777,512    2,306,553     8,098,656     6,295,820    14,147,538        38,952
                                   ------------------------------------------------------------------------------------------------

Expenses:
  Mortality risk charge               (4,491,426)   (1,639,676)    (324,456)   (1,172,164)   (1,942,860)   (2,952,260)     (605,659)
  Administrative expense
    risk charge                       (1,541,176)     (562,634)    (111,333)     (402,213)     (666,668)   (1,013,031)     (207,824)
   Distribution expense charge          (660,504)     (241,129)     (47,714)     (172,377)     (285,715)     (434,156)      (89,067)
                                   ------------------------------------------------------------------------------------------------

      Total expenses                  (6,693,106)   (2,443,439)    (483,503)   (1,746,754)   (2,895,243)   (4,399,447)     (902,550)
                                   ------------------------------------------------------------------------------------------------

Net investment income (loss)          37,405,322    17,334,073    1,823,050     6,351,902     3,400,577     9,748,091      (863,598)
                                   ------------------------------------------------------------------------------------------------

Net realized gains (losses)
  from securities transactions:
    Proceeds from shares sold        197,453,030    27,057,227    7,129,197    16,596,967    17,939,338    40,297,116    15,434,574
    Cost of shares sold             (171,713,723)  (22,896,930)  (6,839,200)  (16,813,095)  (16,563,203)  (33,306,013)  (13,527,772)
                                   ------------------------------------------------------------------------------------------------

Net realized gains (losses)
  from securities transactions        25,739,307     4,160,297      289,997      (216,128)    1,376,135     6,991,103     1,906,802
                                   ------------------------------------------------------------------------------------------------

Net unrealized appreciation
  (depreciation) of investments:
    Beginning of period               48,989,311    14,816,113    1,105,187    (1,326,642)   11,523,299    38,868,171     2,311,661
    End of period                     69,462,881    28,617,724   (3,940,480)     (604,526)   10,201,704    52,559,239     8,655,631
                                   ------------------------------------------------------------------------------------------------

Change in net unrealized
  appreciation/depreciation
  of investments                      20,473,570    13,801,611   (5,045,667)      722,116    (1,321,595)   13,691,068     6,343,970
                                   ------------------------------------------------------------------------------------------------

Increase (decrease) in net
  assets from operations           $  83,618,199  $ 35,295,981  $(2,932,620) $  6,857,890  $  3,455,117  $ 30,430,262  $  7,387,174
                                   ================================================================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -24-
<PAGE>   81

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF OPERATIONS
                               FOR THE YEAR ENDED
                                November 30, 1997
                                   (Continued)


<TABLE>
<CAPTION>
                                                                           Growth/Phoenix
                                        Venture    Federated        Putnam     Investment      Alliance        Growth         Asset
                                          Value        Value        Growth        Counsel        Growth        Income    Allocation
                                      Portfolio    Portfolio     Portfolio      Portfolio     Portfolio     Portfolio     Portfolio
                                   ------------  -----------  ------------   ------------  ------------  ------------  ------------
<S>                                <C>           <C>          <C>            <C>           <C>           <C>           <C>
Investment income:
  Dividends and capital
    gains distributions            $ 12,284,556  $    39,883  $  5,247,220   $ 16,979,065  $ 23,086,017  $ 17,509,019  $ 29,286,192
                                   ------------------------------------------------------------------------------------------------

      Total investment income        12,284,556       39,883     5,247,220     16,979,065    23,086,017    17,509,019    29,286,192
                                   ------------------------------------------------------------------------------------------------

Expenses:
  Mortality risk charge              (7,485,104)    (270,129)   (1,825,352)    (1,962,026)   (4,910,200)   (4,342,961)   (3,926,667)
  Administrative expense
    risk charge                      (2,568,418)     (92,691)     (626,346)      (673,244)   (1,684,873)   (1,490,232)   (1,347,386)
  Distribution expense charge        (1,100,750)     (39,725)     (268,435)      (288,533)     (722,088)     (638,671)     (577,451)
                                   ------------------------------------------------------------------------------------------------

      Total expenses                (11,154,272)    (402,545)   (2,720,133)    (2,923,803)   (7,317,161)   (6,471,864)   (5,851,504)
                                   ------------------------------------------------------------------------------------------------

Net investment income (loss)          1,130,284     (362,662)    2,527,087     14,055,262    15,768,856    11,037,155    23,434,688
                                   ------------------------------------------------------------------------------------------------

Net realized gains (losses)
  from securities transactions:
    Proceeds from shares sold        41,902,820    7,975,085    23,586,742     19,443,794    68,895,096    25,023,738     8,374,215
    Cost of shares sold             (33,523,543)  (6,988,437)  (17,012,494)   (15,123,314)  (55,650,205)  (18,334,272)   (6,726,439)
                                   ------------------------------------------------------------------------------------------------

Net realized gains (losses) from
  securities transactions             8,379,277      986,648     6,574,248      4,320,480    13,244,891     6,689,466     1,647,776
                                   ------------------------------------------------------------------------------------------------

Net unrealized appreciation
  (depreciation) of investments:
    Beginning of period              96,368,190    1,118,454    44,243,026     40,541,194    74,064,408    79,392,543    62,065,190
    End of period                   260,513,321    6,354,475    74,402,917     54,020,390   148,214,653   164,042,181   105,031,733
                                   ------------------------------------------------------------------------------------------------

Change in net unrealized
  appreciation/depreciation
  of investments                    164,145,131    5,236,021    30,159,891     13,479,196    74,150,245    84,649,638    42,966,543
                                   ------------------------------------------------------------------------------------------------

Increase (decrease) in net
  assets from operations           $173,654,692  $ 5,860,007  $ 39,261,226   $ 31,854,938  $103,163,992  $102,376,259  $ 68,049,007
                                   ================================================================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -25-
<PAGE>   82

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF OPERATIONS
                               FOR THE YEAR ENDED
                                November 30, 1997
                                   (Continued)


<TABLE>
<CAPTION>
                                                Balanced/Phoenix
                                     SunAmerica       Investment                  Worldwide    High-Yield       Global    Corporate
                                       Balanced          Counsel      Utility   High Income          Bond         Bond         Bond
                                      Portfolio        Portfolio    Portfolio     Portfolio     Portfolio    Portfolio    Portfolio
                                    -----------------------------------------------------------------------------------------------
<S>                                 <C>              <C>          <C>          <C>           <C>           <C>          <C>
Investment income:
  Dividends and capital
    gains distributions             $    87,426      $ 3,184,886  $    96,119  $  6,528,228  $  8,389,224  $ 4,754,134  $ 1,908,574
                                    -----------------------------------------------------------------------------------------------

      Total investment income            87,426        3,184,886       96,119     6,528,228     8,389,224    4,754,134    1,908,574
                                    -----------------------------------------------------------------------------------------------

Expenses:
  Mortality risk charge                (214,132)        (755,062)    (119,691)     (823,906)   (1,419,905)    (741,321)    (442,810)
  Administrative expense
    risk charge                         (73,477)        (259,090)     (41,070)     (282,713)     (487,222)    (254,375)    (151,944)
  Distribution expense charge           (31,490)        (111,039)     (17,602)     (121,163)     (208,810)    (109,018)     (65,119)
                                    -----------------------------------------------------------------------------------------------

      Total expenses                   (319,099)      (1,125,191)    (178,363)   (1,227,782)   (2,115,937)  (1,104,714)    (659,873)
                                    -----------------------------------------------------------------------------------------------

Net investment income (loss)           (231,673)       2,059,695      (82,244)    5,300,446     6,273,287    3,649,420    1,248,701
                                    -----------------------------------------------------------------------------------------------

Net realized gains (losses)
  from securities transactions:
    Proceeds from shares sold         1,677,733        5,987,736    2,682,700    24,005,082    43,535,286    7,528,389    3,515,900
    Cost of shares sold              (1,508,526)      (5,263,297)  (2,453,626)  (22,398,379)  (41,891,419)  (7,077,927)  (3,350,463)
                                    -----------------------------------------------------------------------------------------------

Net realized gains (losses) from
   securities transactions              169,207          724,439      229,074     1,606,703     1,643,867      450,462      165,437
                                    -----------------------------------------------------------------------------------------------

Net unrealized appreciation
  (depreciation) of investments:
    Beginning of period                 769,769        8,161,832      355,573     5,794,068     5,818,708    6,045,986    2,378,433
    End of period                     4,577,395       13,826,493    2,616,111     6,889,678    14,934,511    6,907,949    4,430,649
                                    -----------------------------------------------------------------------------------------------

Change in net unrealized
  appreciation/depreciation
  of investments                      3,807,626        5,664,661    2,260,538     1,095,610     9,115,803      861,963    2,052,216
                                    -----------------------------------------------------------------------------------------------

Increase (decrease) in net
  assets from operations            $ 3,745,160      $ 8,448,795  $ 2,407,368  $  8,002,759  $ 17,032,957  $ 4,961,845  $ 3,466,354
                                    ===============================================================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -26-
<PAGE>   83


                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                             STATEMENT OF OPERATIONS
                               FOR THE YEAR ENDED
                                November 30, 1997
                                   (Continued)


<TABLE>
<CAPTION>
                                      International          Emerging              Real              Cash
                                    Growth & Income           Markets            Estate         Management
                                          Portfolio         Portfolio         Portfolio           Portfolio                 TOTAL
                                    ---------------------------------------------------------------------------------------------
<S>                                       <C>             <C>               <C>               <C>                 <C>
Investment income:
  Dividends and capital
    gains distributions                   $       0       $         0       $         0       $   6,022,856       $   230,166,858
                                    ---------------------------------------------------------------------------------------------

      Total investment income                     0                 0                 0           6,022,856           230,166,858
                                    ---------------------------------------------------------------------------------------------

Expenses:
  Mortality risk charge                     (99,305)          (66,962)          (55,504)         (1,258,400)          (43,847,938)
  Administrative expense risk charge        (34,075)          (22,977)          (19,046)           (431,804)          (15,045,862)
  Distribution expense charge               (14,604)           (9,848)           (8,162)           (185,059)           (6,448,229)
                                    ---------------------------------------------------------------------------------------------

      Total expenses                       (147,984)          (99,787)          (82,712)         (1,875,263)          (65,342,029)
                                    ---------------------------------------------------------------------------------------------

Net investment income (loss)               (147,984)          (99,787)          (82,712)          4,147,593           164,824,829
                                    ---------------------------------------------------------------------------------------------

Net realized gains (losses) from
  securities transactions:
    Proceeds from shares sold               405,125           443,735         1,502,627         459,227,553         1,067,620,805
    Cost of shares sold                    (394,473)         (469,736)       (1,443,444)       (458,928,759)         (980,198,689)
                                    ---------------------------------------------------------------------------------------------

Net realized gains (losses) from
   securities transactions                   10,652           (26,001)           59,183             298,794            87,422,116
                                    ---------------------------------------------------------------------------------------------

Net unrealized appreciation
  (depreciation) of investments:
    Beginning of period                           0                 0                 0           1,146,984           544,551,458
    End of period                           212,462        (3,248,424)        1,182,933           1,054,729         1,030,916,329
                                    ---------------------------------------------------------------------------------------------

Change in net unrealized
  appreciation/depreciation
  of investments                            212,462        (3,248,424)        1,182,933             (92,255)          486,364,871
                                    ---------------------------------------------------------------------------------------------

Increase (decrese) in net
  assets from operations                  $  75,130       $(3,374,212)      $ 1,159,404       $   4,354,132       $   738,611,816
                                    =============================================================================================
</TABLE>


                 See accompanying notes to financial statements.


                                      -27-
<PAGE>   84



                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                                November 30, 1997


<TABLE>
<CAPTION>
                                                                              Government  International
                                       Capital                    Natural            and    Diversified        Global    Aggressive
                                  Appreciation        Growth    Resources   Quality Bond       Equities      Equities        Growth
                                     Portfolio     Portfolio    Portfolio      Portfolio      Portfolio     Portfolio     Portfolio
                                  -------------------------------------------------------------------------------------------------
<S>                               <C>           <C>           <C>           <C>            <C>           <C>            <C>         
INCREASE (DECREASE) IN NET ASSETS:
From operations:
  Net investment income (loss)    $ 37,405,322  $ 17,334,073  $ 1,823,050   $  6,351,902   $  3,400,577  $  9,748,091   $  (863,598)
  Net realized gains (losses)
    from securities transactions    25,739,307     4,160,297      289,997       (216,128)     1,376,135     6,991,103     1,906,802
  Change in net unrealized
    appreciation/depreciation
    of investments                  20,473,570    13,801,611   (5,045,667)       722,116     (1,321,595)   13,691,068     6,343,970
                                  -------------------------------------------------------------------------------------------------

      Increase (decrease)
        in net assets from
        operations                  83,618,199    35,295,981   (2,932,620)     6,857,890      3,455,117    30,430,262     7,387,174
                                  -------------------------------------------------------------------------------------------------

From capital transactions:
  Net proceeds from units
    sold                            63,814,945    25,522,588    7,473,963     13,954,746     41,819,108    33,005,430    19,057,042
  Cost of units redeemed           (23,750,681)   (9,791,219)  (1,283,606)    (8,320,472)    (7,074,811)  (13,340,530)   (1,959,770)
  Net transfers                     44,369,254    23,594,248    3,127,108      5,132,312     25,642,622    24,373,244    25,978,063

      Increase (decrease)
        in net assets from
        capital transactions        84,433,518    39,325,617    9,317,465     10,766,586     60,386,919    44,038,144    43,075,335
                                  -------------------------------------------------------------------------------------------------

Increase in net assets             168,051,717    74,621,598    6,384,845     17,624,476     63,842,036    74,468,406    50,462,509
Net assets at beginning
  of period                        360,976,677   123,373,134   26,328,927    109,520,077    145,376,243   236,114,107    32,570,387
                                  -------------------------------------------------------------------------------------------------
Net assets at end of period       $529,028,394  $197,994,732  $32,713,772   $127,144,553   $209,218,279  $310,582,513   $83,032,896
                                  =================================================================================================

ANALYSIS OF INCREASE
  (DECREASE) IN UNITS
  OUTSTANDING:
    Units sold                       3,476,602     1,455,312      617,898      1,168,231      3,619,718     2,052,329     1,838,030
    Units redeemed                  (1,228,940)     (532,036)    (102,746)      (689,911)      (602,689)     (810,906)     (178,584)
    Units transferred                2,171,076     1,266,308      250,996        392,483      2,231,185     1,551,555     2,389,678
                                  -------------------------------------------------------------------------------------------------

Increase (decrease) in
  units outstanding                  4,418,738     2,189,584      766,148        870,803      5,248,214     2,792,978     4,049,124
Beginning units                     20,470,395     7,557,844    2,171,050      9,176,239     12,762,343    15,583,207     3,165,900
                                  -------------------------------------------------------------------------------------------------

Ending units                        24,889,133     9,747,428    2,937,198     10,047,042     18,010,557    18,376,185     7,215,024
                                  =================================================================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -28-
<PAGE>   85
                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                                November 30, 1997
                                   (Continued)


<TABLE>
<CAPTION>
                                                                           Growth/Phoenix
                                         Venture    Federated        Putnam    Investment      Alliance        Growth         Asset
                                           Value        Value        Growth       Counsel        Growth        Income    Allocation
                                       Portfolio    Portfolio     Portfolio     Portfolio     Portfolio     Portfolio     Portfolio
                                    -----------------------------------------------------------------------------------------------
<S>                                 <C>           <C>          <C>           <C>           <C>           <C>           <C>
INCREASE (DECREASE) IN NET ASSETS:
From operations:
  Net investment income (loss)      $  1,130,284  $  (362,662) $  2,527,087  $ 14,055,262  $ 15,768,856  $ 11,037,155  $ 23,434,688
  Net realized gains (losses) from
    securities transactions            8,379,277      986,648     6,574,248     4,320,480    13,244,891     6,689,466     1,647,776
  Change in net unrealized
    appreciation/depreciation
    of investments                   164,145,131    5,236,021    30,159,891    13,479,196    74,150,245    84,649,638    42,966,543
                                    -----------------------------------------------------------------------------------------------

      Increase (decrease)
        in net assets
        from operations              173,654,692    5,860,007    39,261,226    31,854,938   103,163,992   102,376,259    68,049,007
                                    -----------------------------------------------------------------------------------------------

From capital transactions:
  Net proceeds from units sold       168,731,762   10,426,813    20,321,341    11,819,554    93,785,157    66,298,687    59,042,689
  Cost of units redeemed             (29,879,481)  (3,379,784)   (8,456,398)   (9,740,821)  (25,525,241)  (20,766,275)  (20,362,730)
  Net transfers                      155,692,370   18,013,600     4,178,527    (7,838,225)   61,152,805    73,096,855    49,254,654
                                    -----------------------------------------------------------------------------------------------

      Increase (decrease)
        in net assets
        from capital
        transactions                 294,544,651   25,060,629    16,043,470    (5,759,492)  129,412,721   118,629,267    87,934,613
                                    -----------------------------------------------------------------------------------------------

Increase in net assets               468,199,343   30,920,636    55,304,696    26,095,446   232,576,713   221,005,526   155,983,620
Net assets at beginning
  of period                          487,989,263   11,234,062   154,096,914   180,451,620   356,815,327   309,755,916   298,525,829
                                    -----------------------------------------------------------------------------------------------
Net assets at end of period         $956,188,606  $42,154,698  $209,401,610  $206,547,066  $589,392,040  $530,761,442  $454,509,449
                                    ===============================================================================================

ANALYSIS OF INCREASE (DECREASE)
  IN UNITS OUTSTANDING:
  Units sold                           9,151,286      869,687     1,268,013       757,853     4,375,748     3,588,612     3,620,967
  Units redeemed                      (1,544,744)    (292,588)     (514,321)     (602,007)   (1,125,364)   (1,074,591)   (1,208,246)
  Units transferred                    8,038,350    1,497,277       229,015      (519,133)    2,466,758     3,735,661     2,919,322
                                    -----------------------------------------------------------------------------------------------

Increase (decrease)
  in units outstanding                15,644,892    2,074,376       982,707      (363,287)    5,717,142     6,249,682     5,332,043
Beginning units                       29,247,554    1,021,137    10,354,025    12,077,737    18,333,555    18,546,142    19,940,733
                                    -----------------------------------------------------------------------------------------------

Ending units                          44,892,446    3,095,513    11,336,732    11,714,450    24,050,697    24,795,824    25,272,776
                                    ===============================================================================================
</TABLE>


                 See accompanying notes to financial statements.


                                      -29-
<PAGE>   86



                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                                November 30, 1997
                                   (Continued)


<TABLE>
<CAPTION>
                                              Balanced/Phoenix
                                   SunAmerica       Investment                  Worldwide    High-Yield       Global    Corporate
                                     Balanced          Counsel      Utility   High Income          Bond         Bond         Bond
                                    Portfolio        Portfolio    Portfolio     Portfolio     Portfolio    Portfolio    Portfolio
                                  -----------------------------------------------------------------------------------------------
<S>                               <C>             <C>           <C>          <C>           <C>           <C>          <C>        
INCREASE (DECREASE) IN NET ASSETS:
From operations:
  Net investment income (loss)    $  (231,673)    $  2,059,695  $   (82,244) $  5,300,446  $  6,273,287  $ 3,649,420  $ 1,248,701
  Net realized gains (losses)
    from securities transactions      169,207          724,439      229,074     1,606,703     1,643,867      450,462      165,437
  Change in net unrealized
    appreciation/depreciation
    of investments                  3,807,626        5,664,661    2,260,538     1,095,610     9,115,803      861,963    2,052,216
                                  -----------------------------------------------------------------------------------------------

        Increase (decrease)
          in net assets from
          operations                3,745,160        8,448,795    2,407,368     8,002,759    17,032,957    4,961,845    3,466,354
                                  -----------------------------------------------------------------------------------------------

From capital transactions:
  Net proceeds from units sold      9,272,164       10,894,722    3,583,011    30,901,544    28,787,123    8,062,445   10,236,124
  Cost of units redeemed           (1,493,051)      (3,296,580)  (2,623,327)   (3,949,611)   (8,833,581)  (3,848,065)  (2,228,695)
  Net transfers                    11,811,849        4,269,742   10,478,114    21,371,247    22,094,696    5,181,039    5,981,956
                                  -----------------------------------------------------------------------------------------------

        Increase (decrease)
         in net assets from
         capital transactions      19,590,962       11,867,884   11,437,798    48,323,180    42,048,238    9,395,419   13,989,385
                                  -----------------------------------------------------------------------------------------------

Increase in net assets             23,336,122       20,316,679   13,845,166    56,325,939    59,081,195   14,357,264   17,455,739
Net assets at beginning
  of period                         9,023,203       63,333,105    5,799,140    45,408,414   108,664,366   66,296,884   35,643,830
                                  -----------------------------------------------------------------------------------------------
Net assets at end of period       $32,359,325     $ 83,649,784  $19,644,306  $101,734,353  $167,745,561  $80,654,148  $53,099,569
                                  ===============================================================================================

ANALYSIS OF INCREASE (DECREASE)
  IN UNITS OUTSTANDING:
  Units sold                          787,249          768,683      320,269     2,047,012     2,134,215      648,001      868,904
  Units redeemed                     (126,500)        (225,942)    (223,501)     (253,400)     (641,812)    (307,787)    (187,790)
  Units transferred                   970,160          289,337      901,117     1,377,896     1,592,652      411,092      495,068
                                  -----------------------------------------------------------------------------------------------

Increase (decrease) in
  units outstanding                 1,630,909          832,078      997,885     3,171,508     3,085,055      751,306    1,176,182
Beginning units                       817,039        4,583,234      543,461     3,196,739     8,358,195    5,413,149    3,059,808
                                  -----------------------------------------------------------------------------------------------

Ending units                        2,447,948        5,415,312    1,541,346     6,368,247    11,443,250    6,164,455    4,235,990
                                  ===============================================================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -30-
<PAGE>   87

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                                November 30, 1997
                                   (Continued)


<TABLE>
<CAPTION>
                                      International        Emerging            Real             Cash
                                    Growth & Income         Markets          Estate       Management
                                          Portfolio       Portfolio       Portfolio        Portfolio              TOTAL
                                    -----------------------------------------------------------------------------------
<S>                                    <C>             <C>             <C>             <C>              <C>            
INCREASE (DECREASE) IN NET ASSETS:
From operations:
  Net investment income (loss)         $   (147,984)   $    (99,787)   $    (82,712)   $   4,147,593    $   164,824,829
  Net realized gains (losses) from
    securities transactions                  10,652         (26,001)         59,183          298,794         87,422,116
  Change in net unrealized
    appreciation/depreciation
    of investments                          212,462      (3,248,424)      1,182,933          (92,255)       486,364,871
                                    -----------------------------------------------------------------------------------

        Increase (decrease) in
          net assets from operations         75,130      (3,374,212)      1,159,404        4,354,132        738,611,816
                                    -----------------------------------------------------------------------------------

From capital transactions:
  Net proceeds from units sold           13,780,789      11,660,679       5,714,592       74,845,717        842,812,735
  Cost of units redeemed                    (97,114)        (33,193)     (1,148,731)     (20,270,825)      (231,454,592)
  Net transfers                          14,356,576       5,710,863      12,955,868      (18,998,081)       600,981,306
                                    -----------------------------------------------------------------------------------

        Increase (decrease) in
          net assets from capital
          transactions                   28,040,251      17,338,349      17,521,729       35,576,811      1,212,339,449
                                    -----------------------------------------------------------------------------------

Increase in net assets                   28,115,381      13,964,137      18,681,133       39,930,943      1,950,951,265
Net assets at beginning of period                 0               0               0       88,383,977      3,255,681,402
                                    -----------------------------------------------------------------------------------
Net assets at end of period            $ 28,115,381    $ 13,964,137    $ 18,681,133    $ 128,314,920    $ 5,206,632,667
                                    -----------------------------------------------------------------------------------

ANALYSIS OF INCREASE (DECREASE)
   IN UNITS OUTSTANDING:
   Units sold                             1,359,331       1,168,066         547,513        6,684,622
   Units redeemed                            (9,246)         (3,471)       (103,433)      (1,801,465)
   Units transferred                      1,371,143         587,327       1,188,724       (1,664,614)
                                    ----------------------------------------------------------------

Increase (decrease) in
  units outstanding                       2,721,228       1,751,922       1,632,804        3,218,543
Beginning units                                   0               0               0        8,005,908
                                    ----------------------------------------------------------------

Ending units                              2,721,228       1,751,922       1,632,804       11,224,451
                                    ================================================================
</TABLE>


                 See accompanying notes to financial statements.

                                      -31-
<PAGE>   88

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                                November 30, 1996


<TABLE>
<CAPTION>
                                                                  Government International
                            Capital                    Natural           and   Diversified        Global   Aggressive       Venture
                       Appreciation        Growth    Resources  Quality Bond      Equities      Equities       Growth         Value
                          Portfolio     Portfolio    Portfolio     Portfolio     Portfolio     Portfolio    Portfolio     Portfolio
                       ------------------------------------------------------------------------------------------------------------
<S>                    <C>           <C>           <C>          <C>           <C>           <C>           <C>          <C>
INCREASE (DECREASE)
 IN NET ASSETS:
From operations:
  Net investment
   income (loss)       $  6,683,216  $  3,494,209  $   225,523  $  5,327,732  $   (189,589) $  3,162,651  $  (127,227) $ (1,692,102)
  Net realized gains
    (losses) from
    securities
    transactions         23,414,274     1,767,853      633,329      (445,581)      861,006     2,403,408      (24,883)    2,376,894
  Change in net
    unrealized
    appreciation/
    depreciation
    of investments       23,793,774    17,259,322      909,630      (889,640)    9,321,982    24,426,237    2,311,661    79,711,419
                       ------------------------------------------------------------------------------------------------------------

      Increase in net
        assets
        from operations  53,891,264    22,521,384    1,768,482     3,992,511     9,993,399    29,992,296    2,159,551    80,396,211
                       ------------------------------------------------------------------------------------------------------------

From capital
 transactions:
  Net proceeds from
    units sold           76,601,464    23,740,929    9,561,486    27,653,612    54,527,145    39,115,494   19,138,811   163,175,644
  Cost of units
    redeemed            (12,784,433)   (3,837,533)  (1,065,244)   (6,633,414)   (3,080,515)   (8,799,730)  (2,278,942)   (9,283,640)
  Net transfers          55,273,130     3,644,446    6,924,307   (13,348,877)   37,024,165    15,135,906   13,550,967   103,880,931
                       ------------------------------------------------------------------------------------------------------------

    Increase (decrease)
      in net assets
      from capital
      transactions      119,090,161    23,547,842   15,420,549     7,671,321    88,470,795    45,451,670   30,410,836   257,772,935
                       ------------------------------------------------------------------------------------------------------------

Increase (decrease)
  in net assets         172,981,425    46,069,226   17,189,031    11,663,832    98,464,194    75,443,966   32,570,387   338,169,146
Net assets at
 beginning of period    187,995,252    77,303,908    9,139,896    97,856,245    46,912,049   160,670,141            0   149,820,117
                       ------------------------------------------------------------------------------------------------------------
Net assets at end
  of period            $360,976,677  $123,373,134  $26,328,927  $109,520,077  $145,376,243  $236,114,107  $32,570,387  $487,989,263
                       ============================================================================================================

ANALYSIS OF INCREASE
  (DECREASE) IN UNITS
  OUTSTANDING:
  Units sold              4,765,562     1,677,049      817,912     2,417,937     5,008,240     2,792,651    1,986,190    11,480,599
  Units redeemed           (795,327)     (270,932)     (91,245)     (579,841)     (282,701)     (628,827)    (229,445)     (646,042)
  Units transferred       3,253,005       183,464      596,224    (1,166,534)    3,377,738     1,068,500    1,409,155     7,142,205
                       ------------------------------------------------------------------------------------------------------------

Increase (decrease)
  in units outstanding    7,223,240     1,589,581    1,322,891       671,562     8,103,277     3,232,324    3,165,900    17,976,762
Beginning units          13,247,155     5,968,263      848,159     8,504,677     4,659,066    12,350,883            0    11,270,792
                       ------------------------------------------------------------------------------------------------------------

Ending units             20,470,395     7,557,844    2,171,050     9,176,239    12,762,343    15,583,207    3,165,900    29,247,554
                       ============================================================================================================
</TABLE>



                 See accompanying notes to financial statements.

                                      -32-
<PAGE>   89

                            VARIABLE SEPARATE ACCOUNT
               (Portion Relating to the POLARIS Variable Annuity)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                       STATEMENT OF CHANGES IN NET ASSETS
                               FOR THE YEAR ENDED
                                November 30, 1996
                                   (Continued)


<TABLE>
<CAPTION>
                                                  Growth/Phoenix                                                   Balanced/Phoenix
                           Federated        Putnam    Investment      Alliance       Growth-         Asset  SunAmerica   Investment
                               Value        Growth       Counsel        Growth        Income    Allocation    Balanced      Counsel
                           Portfolio     Portfolio     Portfolio     Portfolio     Portfolio     Portfolio   Portfolio    Portfolio
                         ----------------------------------------------------------------------------------------------------------
<S>                      <C>          <C>           <C>           <C>           <C>           <C>           <C>         <C>        
INCREASE (DECREASE)
 IN NET ASSETS:
From operations:
  Net investment
    income (loss)        $   (45,927) $ (1,935,453) $  9,218,960  $  9,733,102  $  4,060,924  $  8,264,306  $  (41,729) $   617,491
  Net realized gains
    (losses) from
    securities
    transactions              (3,715)    3,028,306     2,545,612     4,241,634     2,881,965       712,562      60,508      207,371
  Change in net
    unrealized
    appreciation/
    depreciation of
    investments            1,118,454    21,943,270    13,399,999    48,511,798    48,512,865    34,266,708     769,769    5,173,131
                         ----------------------------------------------------------------------------------------------------------

      Increase in net
        assets from
        operations         1,068,812    23,036,123    25,164,571    62,486,534    55,455,754    43,243,576     788,548    5,997,993
                         ----------------------------------------------------------------------------------------------------------

From capital
 transactions:
  Net proceeds from
    units sold             6,696,816    20,936,991    21,818,159    93,131,739    66,216,411    61,800,477   6,831,490   24,730,811
  Cost of units
    redeemed                 (63,953)   (6,599,755)   (7,626,629)   (9,663,521)   (8,604,568)  (10,673,978)  1,556,007)  (1,651,786)
  Net transfers            3,532,387     4,171,906    (5,709,622)   47,853,520    29,425,995     9,326,845   2,959,172    4,146,437
                         ----------------------------------------------------------------------------------------------------------

      Increase (decrease)
        in net assets
        from capital
        transactions      10,165,250    18,509,142     8,481,908   131,321,738    87,037,838    60,453,344   8,234,655   27,225,462
                         ----------------------------------------------------------------------------------------------------------

Increase (decrease)
  in net assets           11,234,062    41,545,265    33,646,479   193,808,272   142,493,592   103,696,920   9,023,203   33,223,455
Net assets at
  beginning of period              0   112,551,649   146,805,141   163,007,055   167,262,324   194,828,909           0   30,109,650
                         ----------------------------------------------------------------------------------------------------------
Net assets at
  end of period          $11,234,062  $154,096,914  $180,451,620  $356,815,327  $309,755,916  $298,525,829  $9,023,203  $63,333,105
                         ==========================================================================================================

ANALYSIS OF INCREASE
  (DECREASE) IN UNITS
  OUTSTANDING:
  Units sold                 672,856     1,613,854     1,626,331     5,705,725     4,586,759     4,629,094     675,529    1,946,479
  Units redeemed              (6,317)     (506,275)     (567,756)     (588,952)     (595,761)     (793,782)   (150,415)    (130,093)
  Units transferred          354,598       313,448      (438,737)    2,656,712     1,994,279       687,071     291,925      324,947
                         ----------------------------------------------------------------------------------------------------------

Increase (decrease)
  in units outstanding     1,021,137     1,421,027       619,838     7,773,485     5,985,277     4,522,383     817,039    2,141,333
Beginning units                    0     8,932,998    11,457,899    10,560,070    12,560,865    15,418,350           0    2,441,901
                         ----------------------------------------------------------------------------------------------------------

Ending units               1,021,137    10,354,025    12,077,737    18,333,555    18,546,142    19,940,733     817,039    4,583,234
                         ==========================================================================================================
</TABLE>



                 See accompanying notes to financial statements.


                                      -33-
<PAGE>   90
                                       VARIABLE SEPARATE ACCOUNT
                          (Portion Relating to the POLARIS Variable Annuity)
                                                  OF
                                ANCHOR NATIONAL LIFE INSURANCE COMPANY

                                  STATEMENT OF CHANGES IN NET ASSETS
                                          FOR THE YEAR ENDED
                                           November 30, 1996
                                              (Continued)

<TABLE>
<CAPTION>
                                                                   Worldwide        High-Yield           Global        Corporate  
                                                    Utility      High Income              Bond             Bond             Bond  
                                                  Portfolio        Portfolio         Portfolio        Portfolio        Portfolio  
                                           ---------------------------------------------------------------------------------------
<S>                                        <C>               <C>               <C>               <C>               <C>            
INCREASE (DECREASE) IN NET ASSETS:
From operations:
   Net investment income (loss)            $       (26,830)  $       609,853   $     5,908,541   $     3,070,442   $       717,467
   Net realized gains (losses) from
      securities transactions                        1,073           444,184           405,726           779,817           132,082
   Change in net unrealized appreciation/
      depreciation of investments                  355,573         4,945,992         5,610,690         1,810,803           770,471
                                           ---------------------------------------------------------------------------------------

Increase in net assets from operations             329,816         6,000,029        11,924,957         5,661,062         1,620,020
                                           ---------------------------------------------------------------------------------------

From capital transactions:
   Net proceeds from units sold                  4,523,252        19,367,963        24,099,082        12,135,788        13,578,677
   Cost of units redeemed                          (25,056)       (1,780,947)       (5,893,480)       (3,222,889)       (1,537,267)
   Net transfers                                   971,128         9,991,617        (2,720,348)       (7,531,416)       (7,137,549)
                                           ---------------------------------------------------------------------------------------

Increase (decrease) in net assets
  from capital transactions                      5,469,324        27,578,633        15,485,254         1,381,483         4,903,861 
                                           ---------------------------------------------------------------------------------------

Increase (decrease) in net assets                5,799,140        33,578,662        27,410,211         7,042,545         6,523,881 
Net assets at beginning of period                        0        11,829,752        81,254,155        59,254,339        29,119,949 
                                           ---------------------------------------------------------------------------------------
Net assets at end of period                $     5,799,140   $    45,408,414   $   108,664,366   $    66,296,884   $    35,643,830 
                                           =======================================================================================


ANALYSIS OF INCREASE (DECREASE)
   IN UNITS OUTSTANDING:
   Units sold                                      450,097         1,521,018         1,991,539         1,053,412         1,222,601 
   Units redeemed                                   (2,465)         (141,970)         (484,674)         (278,565)         (138,031)
   Units transferred                                95,829           776,863          (224,121)         (649,856)         (647,827)
                                           ---------------------------------------------------------------------------------------
                                                                                                                                   

Increase (decrease) in units outstanding           543,461         2,155,911         1,282,744           124,991           436,743 
Beginning units                                          0         1,040,828         7,075,451         5,288,158         2,623,065 
                                           ---------------------------------------------------------------------------------------
Ending units                                       543,461         3,196,739         8,358,195         5,413,149         3,059,808 
                                           =======================================================================================
</TABLE>


<TABLE>
<CAPTION>
                                                       Cash
                                                 Management
                                                  Portfolio        TOTAL
                                           ----------------------------------
<S>                                         <C>               <C>   
INCREASE (DECREASE) IN NET ASSETS:
From operations:
   Net investment income (loss)             $     2,227,613   $    59,263,173
   Net realized gains (losses) from
      securities transactions                     2,214,720        48,638,145
   Change in net unrealized appreciation/
      depreciation of investments                  (168,487)      343,865,421
                                           ----------------------------------

Increase in net assets from operations            4,273,846       451,766,739
                                           ----------------------------------

From capital transactions:
   Net proceeds from units sold                  99,349,340       888,731,581
   Cost of units redeemed                       (20,113,324)     (126,776,611)
   Net transfers                                (84,506,732)      226,858,315
                                           ----------------------------------

Increase (decrease) in net assets
  from capital transactions                      (5,270,716)      988,813,285
                                           ----------------------------------

Increase (decrease) in net assets                  (996,870)    1,440,580,024
Net assets at beginning of period                89,380,847     1,815,101,378
                                           ----------------------------------
Net assets at end of period                 $    88,383,977   $ 3,255,681,402
                                           ==================================


ANALYSIS OF INCREASE (DECREASE)
   IN UNITS OUTSTANDING:
   Units sold                                     9,156,831
   Units redeemed                                (1,854,726)
   Units transferred                             (7,669,176)
                                           ----------------

Increase (decrease) in units outstanding           (367,071)
Beginning units                                   8,372,979
                                           ----------------
Ending units                                      8,005,908
                                           ================
</TABLE>


                 See accompanying notes to financial statements.


                                      -34-
<PAGE>   91

                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                          NOTES TO FINANCIAL STATEMENTS



1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

   Variable Separate Account (Portion Relating to the POLARIS Variable Annuity)
   of Anchor National Life Insurance Company (the "Separate Account") is a
   segregated investment account of Anchor National Life Insurance Company (the
   "Company"). The Company is an indirect, wholly owned subsidiary of SunAmerica
   Inc. The Separate Account is registered as a segregated unit investment trust
   pursuant to the provisions of the Investment Company Act of 1940, as amended.

   The Separate Account is composed of twenty-five variable portfolios (the
   "Variable Accounts"). Each of the Variable Accounts is invested solely in the
   shares of either (1) one of the four currently available investment
   portfolios of Anchor Series Trust ("Anchor Trust") or (2) one of the
   twenty-one currently available investment portfolios of SunAmerica Series
   Trust ("SunAmerica Trust"). The Anchor Trust and the SunAmerica Trust (the
   "Trusts") are each diversified, open-end, affiliated investment companies,
   which retain investment advisors to assist in the investment activities of
   the Trusts. The participant may elect to have payments allocated to any of
   five guaranteed- interest funds of the Company (the "General Account"), which
   are not a part of the Separate Account. The financial statements include
   balances allocated by the participant to the twenty-five Variable Accounts
   and do not include balances allocated to the General Account.

   The inception date of the International Growth and Income, Emerging Markets,
   and Real Estate Portfolios was June 2, 1997. The inception date of the
   Aggressive Growth, Federated Value, SunAmerica Balanced, and Utility
   Portfolios was June 3, 1996. The inception date of the Natural Resources,
   International Diversified Equities, Venture Value, Balanced/Phoenix
   Investment Counsel and Worldwide High Income Portfolios was October 31, 1994.
   The inception date of the Asset Allocation, Global Bond and Corporate Bond
   Portfolios was July 1, 1993. The inception date of the remaining portfolios
   was February 9, 1993.



                                      -35-
<PAGE>   92

                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                          NOTES TO FINANCIAL STATEMENTS



1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

   The investment objectives and policies of the four portfolios of the Anchor
   Trust are summarized below:

   The CAPITAL APPRECIATION PORTFOLIO seeks long-term capital appreciation. This
   portfolio invests in growth equity securities which are widely diversified by
   industry and company and may engage in transactions involving stock index
   futures and options thereon as a hedge against changes in market conditions.

   The GROWTH PORTFOLIO seeks capital appreciation. This portfolio invests in
   growth equity securities and may engage in transactions involving stock index
   futures and options thereon as a hedge against changes in market conditions.

   The NATURAL RESOURCES PORTFOLIO seeks a total return in excess of the U.S.
   rate of inflation as represented by the Consumer Price Index. This portfolio
   invests primarily in equity securities of U.S. or foreign companies which are
   expected to provide favorable returns in periods of rising inflation.

   The GOVERNMENT AND QUALITY BOND PORTFOLIO seeks relatively high current
   income, liquidity and security of principal. This portfolio invests in
   obligations issued, guaranteed or insured by the U.S. Government, its
   agencies or instrumentalities and in corporate debt securities rated Aa or
   better by Moody's Investor Service, Inc. or AA or better by Standard & Poor's
   Corporation.

   Anchor Trust has portfolios in addition to those identified above; however,
   none of these other portfolios is currently available for investment under
   the Separate Account.

   The investment objectives and policies of the twenty-one portfolios of the
   SunAmerica Trust are summarized below:

   The INTERNATIONAL DIVERSIFIED EQUITIES PORTFOLIO seeks long-term capital
   appreciation. This portfolio invests in accordance with country weightings as
   determined by the subadvisor in common stocks of foreign issuers which, in
   the aggregate, replicate broad country indices.



                                      -36-
<PAGE>   93

                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                          NOTES TO FINANCIAL STATEMENTS


1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

   The GLOBAL EQUITIES PORTFOLIO seeks long-term growth of capital. This
   portfolio invests primarily in common stocks or securities of U.S. and
   foreign issuers with common stock characteristics which demonstrate the
   potential for appreciation and engages in transactions in foreign currencies.

   The AGGRESSIVE GROWTH PORTFOLIO seeks capital appreciation. This portfolio
   invests primarily in equity securities of small capitalization growth
   companies.

   The VENTURE VALUE PORTFOLIO seeks growth of capital. This portfolio invests
   primarily in common stocks.

   The FEDERATED VALUE PORTFOLIO seeks growth of capital and income. This
   portfolio invests primarily in the securities of high quality companies.

   The PUTNAM GROWTH (PREVIOUSLY KNOWN AS PROVIDENT GROWTH PORTFOLIO),
   GROWTH/PHOENIX INVESTMENT COUNSEL AND ALLIANCE GROWTH PORTFOLIOS seek
   long-term growth of capital. These portfolios invest primarily in common
   stocks or securities with common stock characteristics which the advisor
   believes have the potential for appreciation.

   The GROWTH-INCOME PORTFOLIO seeks growth of capital and income. This
   portfolio invests primarily in common stocks or securities which demonstrate
   the potential for appreciation and/or dividends.

   The ASSET ALLOCATION PORTFOLIO seeks high total return (including income and
   capital gains) consistent with preservation of capital over the long term.
   This portfolio invests in a diversified selection of common stocks and other
   securities having common stock characteristics, bonds and other intermediate
   and long-term fixed-income securities and money market instruments (debt
   securities maturing in one year or less) in any combination.

   The SUNAMERICA BALANCED PORTFOLIO seeks to conserve principal. This portfolio
   maintains at all times a balanced portfolio of stocks and bonds.

   The BALANCED/PHOENIX INVESTMENT COUNSEL PORTFOLIO seeks reasonable income,
   long-term capital growth and conservation of capital. This portfolio invests
   primarily in common stocks and fixed-income securities, with an emphasis on
   income-producing securities which appear to have some potential for capital
   enhancement.



                                      -37-
<PAGE>   94

                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                          NOTES TO FINANCIAL STATEMENTS



1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

   The UTILITY PORTFOLIO seeks high current income and moderate capital
   appreciation. This portfolio invests primarily in the equity and debt
   securities of utility companies.

   The WORLDWIDE HIGH INCOME PORTFOLIO seeks high current income and,
   secondarily, capital appreciation. This portfolio invests primarily in a
   selection of high-yielding fixed-income securities of issuers located
   throughout the world.

   The HIGH-YIELD BOND PORTFOLIO seeks a high level of current income and,
   secondarily, seeks capital appreciation. This portfolio invests primarily in
   intermediate and long-term corporate obligations, with emphasis on
   higher-yielding, higher-risk, lower-rated or unrated securities.

   The GLOBAL BOND PORTFOLIO seeks a high total return, emphasizing current
   income and, to a lesser extent, providing opportunities for capital
   appreciation. This portfolio invests in high quality fixed-income securities
   of U.S. and foreign issuers and engages in transactions in foreign
   currencies.

   The CORPORATE BOND PORTFOLIO seeks a high total return with only moderate
   price risk. This portfolio invests primarily in investment grade fixed-income
   securities.

   The INTERNATIONAL GROWTH AND INCOME PORTFOLIO seeks growth of capital with
   current income as a secondary objective. This portfolio invests primarily in
   common stocks traded on markets outside the United States.

   The EMERGING MARKETS PORTFOLIO seeks long-term capital appreciation. This
   portfolio invests mainly in the common stocks and other equity securities of
   companies that its subadvisor believes have above-average growth prospects
   primarily in emerging markets outside the United States.

   The REAL ESTATE PORTFOLIO seeks to achieve total return through a combination
   of growth and income. This portfolio invests primarily in securities of
   companies principally engaged in or related to the real estate industry or
   which own significant real estate assets or which primarily invest in real
   estate financial instruments.



                                      -38-
<PAGE>   95

                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                          NOTES TO FINANCIAL STATEMENTS



1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (continued)

   The CASH MANAGEMENT PORTFOLIO seeks high current yield while preserving
   capital. This portfolio invests in a diversified selection of money market
   instruments.

   Purchases and sales of shares of the portfolios of the Trusts are valued at
   the net asset values of the shares on the date the shares are purchased or
   sold. Dividends and capital gains distributions are recorded when received.
   Realized gains and losses on the sale of investments in the Trusts are
   recognized at the date of sale and are determined on an average cost basis.

   Accumulation unit values are computed daily based on the total net assets of
   the Variable Accounts.



                                      -39-
<PAGE>   96


                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                          NOTES TO FINANCIAL STATEMENTS



2. CHARGES AND DEDUCTIONS

   Charges and deductions are applied against the current value of the Separate
   Account and are paid as follows:

   WITHDRAWAL CHARGE: The contract value may be withdrawn at any time during the
   accumulation period. Purchase payments that are no longer subject to the
   withdrawal charge and not previously withdrawn and earnings in the contract
   may be withdrawn free of withdrawal charges at any time. In addition, there
   is a free withdrawal amount for the first withdrawal during a contract year
   after the first contract year. The free withdrawal amount is the greater of
   earnings in the contract or 10% of the purchase payments that have been
   invested for at least one year, and not withdrawn, less any withdrawals made
   during the year. Should a withdrawal exceed the free withdrawal amount, a
   withdrawal charge, in certain circumstances, is imposed and paid to the
   Company.

   Withdrawal charges vary in amount depending upon the number of years since
   the purchase payment being withdrawn was made. The withdrawal charge is
   deducted from the remaining contract value so that the actual reduction in
   contract value as a result of the withdrawal will be greater than the
   withdrawal amount requested and paid. For purposes of determining the
   withdrawal charge, withdrawals will be allocated first to investment income,
   if any (which may generally be withdrawn free of a withdrawal charge), and
   then to the oldest purchase payments first so that all withdrawals are
   allocated to purchase payments to which the lowest (if any) withdrawal charge
   applies.

   Any amount withdrawn which exceeds a free withdrawal may be subject to a
   withdrawal charge in accordance with the withdrawal charge table shown below:

<TABLE>
<CAPTION>
                              Policy                       Applicable Withdrawal
                               Year                         Charge Percentage
                     ----------------------              ---------------------------
<S>                                                                     <C>
                      First                                             7%
                      Second                                            6%
                      Third                                             5%
                      Fourth                                            4%
                      Fifth                                             3%
                      Sixth                                             2%
                      Seventh                                           1%
                      Eighth and beyond                                 0%
</TABLE>



                                      -40-
<PAGE>   97

                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                          NOTES TO FINANCIAL STATEMENTS


2.  CHARGES AND DEDUCTIONS (continued)

    CONTRACT MAINTENANCE FEE: An annual contract maintenance fee of $35 ($30 in
    North Dakota and Utah) is charged against each contract, which reimburses
    the Company for expenses incurred in establishing and maintaining records
    relating to a contract. The contract maintenance fee will be assessed on
    each anniversary during the accumulation phase. In the event that a total
    surrender of contract value is made, the entire charge will be assessed as
    of the date of surrender.

    TRANSFER FEE: A transfer fee of $25 ($10 in Pennsylvania and Texas) is
    assessed on each transfer of funds in excess of fifteen transactions within
    a contract year.

    PREMIUM TAXES: Premium taxes or other taxes payable to a state or other
    governmental entity will be charged against the contract values. Some states
    assess premium taxes at the time purchase payments are made; others assess
    premium taxes at the time annuity payments begin. The Company currently
    intends to deduct premium taxes at the time of surrender or upon
    annuitization; however, it reserves the right to deduct any premium taxes
    when incurred or upon the payment of the death benefit.

    MORTALITY AND EXPENSE RISK CHARGE: The Company deducts mortality and expense
    risk charges, which total to an annual rate of 1.37% of the net asset value
    of each portfolio, computed on a daily basis. The mortality risk charge is
    compensation for the mortality risks assumed by the Company from its
    contractual obligations to make annuity payments after the contract has
    annuitized for the life of the annuitant and to provide death benefits, and
    for assuming the risk that the current charges will be insufficient in the
    future to cover the cost of administering the contract.

    DISTRIBUTION EXPENSE CHARGE: The Company deducts a distribution expense
    charge at an annual rate of 0.15% of the net asset value of each portfolio,
    computed on a daily basis. This charge is for all expenses associated with
    the distribution of the contract. These expenses include preparing the
    contract, confirmations and statements, providing sales support and
    maintaining contract records. If this charge is not enough to cover the
    costs of distributing the contract, the Company will bear the loss.

    SEPARATE ACCOUNT INCOME TAXES: The Company currently does not maintain a
    provision for taxes, but has reserved the right to establish such a
    provision for taxes in the future if it determines, in its sole discretion,
    that it will incur a tax as a result of the operation of the Separate
    Account.



                                      -41-
<PAGE>   98


                            VARIABLE SEPARATE ACCOUNT
               (PORTION RELATING TO THE POLARIS VARIABLE ANNUITY)
                                       OF
                     ANCHOR NATIONAL LIFE INSURANCE COMPANY

                          NOTES TO FINANCIAL STATEMENTS


3.  INVESTMENT IN ANCHOR TRUST AND SUNAMERICA TRUST

    The aggregate cost of the Trusts' shares acquired and the aggregate proceeds
    from shares sold during the year ended November 30, 1997 consist of the
    following:

<TABLE>
<CAPTION>
                                               Cost of Shares          Proceeds from
    Variable Accounts                                Acquired            Shares Sold
    ---------------------------               ---------------        ---------------
<S>                                           <C>                    <C>           
    ANCHOR TRUST:
    Capital Appreciation Portfolio            $  319,291,871         $  197,453,030
    Growth Portfolio                              83,716,917             27,057,227
    Natural Resources Portfolio                   18,269,714              7,129,197
    Government and Quality Bond
       Portfolio                                  33,715,455             16,596,967

    SUNAMERICA TRUST:
    International Diversified
       Equities Portfolio                         81,726,832             17,939,338
    Global Equities Portfolio                     94,083,351             40,297,116
    Aggressive Growth Portfolio                   57,646,312             15,434,574
    Venture Value Portfolio                      337,577,753             41,902,820
    Federated Value Portfolio                     32,673,050              7,975,085
    Putnam Growth Portfolio                       42,157,298             23,586,742
    Growth/Phoenix Investment
       Counsel Portfolio                          27,739,564             19,443,794
    Alliance Growth Portfolio                    214,076,671             68,895,096
    Growth-Income Portfolio                      154,690,162             25,023,738
    Asset Allocation Portfolio                   119,743,519              8,374,215
    SunAmerica Balanced Portfolio                 21,037,022              1,677,733
    Balanced/Phoenix Investment
       Counsel Portfolio                          19,915,315              5,987,736
    Utility Portfolio                             14,038,252              2,682,700
    Worldwide High Income Portfolio               77,628,707             24,005,082
    High-Yield Bond Portfolio                     91,856,810             43,535,286
    Global Bond Portfolio                         20,573,227              7,528,389
    Corporate Bond Portfolio                      18,753,987              3,515,900
    International Growth & Income                 28,297,392                405,125
    Emerging Markets                              17,682,297                443,735
    Real Estate                                   18,941,645              1,502,627
    Cash Management Portfolio                    498,951,957            459,227,553
                                                 ===========            ===========
</TABLE>


                                      -42-
<PAGE>   99


4.  FEDERAL INCOME TAXES

    The Company qualifies for federal income tax treatment granted to life
    insurance companies under subchapter L of the Internal Revenue Service Code
    (the "Code"). The operations of the Separate Account are part of the total
    operations of the Company and are not taxed separately. The Separate Account
    is not treated as a regulated investment company under the Code.






                                      -43-

<PAGE>   100
                           PART C - OTHER INFORMATION

Item 24.     Financial Statements and Exhibits

(a)    Financial Statements

        The following financial statements are included in Part A of the
        Registration Statement:

                Consolidated Financial Statements of Anchor National Life
                Insurance Company for the fiscal year ended September 30, 1998

   
    


        The following financial statements are included in Part B of the
        Registration Statement:

   
                Financial Statements of Variable Separate Account (Portion
                Relating to the POLARIS Variable Annuity) for the fiscal year
                ended November 30, 1997
    


(b)    Exhibits

   
<TABLE>
<S>     <C>                                                <C>
(1)     Resolutions Establishing Separate Account......    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
(2)     Custody Agreements.............................    Not Applicable
(3)     (a) Distribution Contract......................    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
        (b) Selling Agreement..........................    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
(4)     Variable Annuity Contract......................    Filed March 20, 1998,
                                                           Post-Effective Amendment 12
                                                           and Amendment 29 to this
                                                           Registration Statement
(5)     Application for Contract.......................    Filed March 20, 1998,
                                                           Post-Effective Amendment 12
                                                           and Amendment 29 to this
                                                           Registration Statement
(6)     Depositor - Corporate Documents
        (a) Certificate of Incorporation...............    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
        (b) By-Laws....................................    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
(7)     Reinsurance Contract...........................    Not Applicable
(8)     Fund Participation Agreement...................    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
(9)     Opinion of Counsel.............................    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
        Consent of Counsel.............................    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
(10)    Consent of Independent Accountants.............    Filed Herewith
(11)    Financial Statements Omitted from Item 23......    None
(12)    Initial Capitalization Agreement...............    Not Applicable
(13)    Performance Computations.......................    Not Applicable
(14)    Diagram and Listing of All Persons Directly
        or Indirectly Controlled By or Under Common
        Control with Anchor National Life Insurance
        Company, the Depositor of Registrant...........    Filed March 30, 1998 on
                                                           Form 10-K, SEC File 001-08787
(15)    Powers of Attorney.............................    Filed January 30, 1998,
                                                           Post-Effective Amendment 11
                                                           and Amendment 28 to this
                                                           Registration Statement
(27)    Financial Data Schedules.......................    Not Applicable
</TABLE>
    

Item 25.  Directors and Officers of the Depositor

        The officers and directors of Anchor National Life Insurance Company are
listed below. Their principal business address is 1 SunAmerica Center, Los
Angeles, California 90067-6022, unless otherwise noted.


<TABLE>
<CAPTION>
Name                                Position
- ----                                --------
<S>                            <C>
Eli Broad                      Chairman, President and
                               Chief Executive Officer
Jay S. Wintrob                 Director and Executive Vice President
Peter McMillan                 Director
James R. Belardi               Director and Senior Vice President
Susan L. Harris                Director, Senior Vice President
                               and Secretary
Jana W. Greer                  Director and Senior Vice President
Scott L. Robinson              Director and Senior Vice President
James W. Rowan                 Director and Senior Vice President
N. Scott Gillis                Senior Vice President and Controller
</TABLE>

<PAGE>   101

<TABLE>
<CAPTION>
Name                                Position
- ----                                --------
<S>                            <C>
Edwin R. Reoliquio             Senior Vice President and Chief Actuary
Victor E. Akin                 Senior Vice President
David R. Bechtel               Vice President and Treasurer
J. Franklin Grey               Vice President
Keith B. Jones                 Vice President
Michael Lindquist              Vice President
Edward P. Nolan*               Vice President
Greg Outcalt                   Vice President
Scott H. Richland              Vice President
</TABLE>

- ------------------
* 88 Bradley Road, P.O. Box 4005, Woodbridge, Connecticut 06525


<PAGE>   102
Item 26.  Persons Controlled By or Under Common Control With Depositor or

Registrant

        The Registrant is a separate account of Anchor National Life Insurance
Company (Depositor). For a complete listing and diagram of all persons directly
or indirectly controlled by or under common control with the Depositor or
Registrant, see Exhibit 14 which is incorporated herein by reference.

   
    

Item 27.   Number of Contract Owners

   
        As of December 31, 1998, the number of Contracts funded by the Variable
        Separate Account of Anchor National Life Insurance Company (Portion
        relating to the Polaris Variable Annuity) was 99,625, of which 37,619
        were Qualified Contracts and 61,646 were Nonqualified Contracts.
    


Item 28.  Indemnification

        None.


Item 29.   Principal Underwriter

   
        SunAmerica Capital Services, Inc. serves as distributor to the
Registrant, Presidential Variable Account One, FS Variable Separate Account,
Variable Annuity Account One, FS Variable Annuity Account One, Variable Annuity
Account Four, Variable Annuity Account Five and Variable Annuity Account Seven.
SunAmerica Capital Services, Inc. also serves as the underwriter to the
SunAmerica Income Funds, SunAmerica Equity Funds, SunAmerica Money Market Funds,
Inc., Style Select Series, Inc. and the SunAmerica Strategic Investment Series,
Inc. (currently in Registration); all issued by SunAmerica Asset Management
Company.
    

        Its principal business address is 733 Third Avenue, 4th Floor, New York,
New York 10017. The following are the directors and officers of SunAmerica
Capital Services, Inc.


<TABLE>
<CAPTION>
        Name                        Position with Distributor
        ----                        -------------------------
<S>                                 <C>
        J. Steven Neamtz            Director and President
        Robert M. Zakem             Director, Executive Vice
                                    President, General Counsel
                                    and Assistant Secretary
        Peter Harbeck               Director
        Debbie Potash-Turner        Controller
        Per Furmark                 Vice President
        James Nichols               Vice President
        Susan L. Harris             Secretary
</TABLE>


<TABLE>
<CAPTION>
                      Net
                      Distribution          Compensation
Name of               Discounts and         on Redemption        Brokerage
Distributor           Commissions           Annuitization        Commission   Commissions*
- ------------          --------------        -------------        -----------  ------------
<S>                   <C>                   <C>                  <C>           <C>
SunAmerica            None                  None                 None         None
 Capital
 Services, Inc.
</TABLE>

- ------------------
* Distribution fee is paid by Anchor National Life Insurance Company.


Item 30.   Location of Accounts and Records

        Anchor National Life Insurance Company, the Depositor for the
Registrant, is located at 1 SunAmerica Center, Los Angeles, California 90067-
6022. SunAmerica Capital Services, Inc., the distributor of the Contracts, is
located at 733 Third Avenue, 4th Floor, New York, New York 10017. Each maintains
those accounts and records required to be maintained by it pursuant to Section
31(a) of the Investment Company Act and the rules promulgated thereunder.

        State Street Bank and Trust Company, 225 Franklin Street, Boston,
Massachusetts 02100, maintains certain accounts and records pursuant to the
instructions of the Registrant.


<PAGE>   103
Item 31.  Management Services

        Not Applicable.


<PAGE>   104
Item 32.  Undertakings

        Registrant undertakes to (1) file post-effective amendments to this
Registration Statement as frequently as is necessary to ensure that the audited
financial statements in the Registration Statement are never more than 16 months
old for so long as payments under the variable annuity Contracts may be
accepted; (2) include either (A) as part of any application to purchase a
Contract offered by the prospectus forming a part of the Registration Statement,
a space that an applicant can check to request a Statement of Additional
Information, or (B) a postcard or similar written communication affixed to or
included in the Prospectus that the Applicant can remove to send for a Statement
of Additional Information; and (3) deliver any Statement of Additional
Information and any financial statements required to be made available under
this Form N-4 promptly upon written or oral request.

Item 33.  Representation

A)      The Company hereby represents that it is relying upon a No-Action Letter
issued to the American Council of Life Insurance dated November 28, 1988
(Commission ref. IP-6-88) and that the following provisions have been complied
with:

1.      Include appropriate disclosure regarding the redemption restrictions
        imposed by Section 403(b)(11) in each registration statement, including
        the prospectus, used in connection with the offer of the contract;

2.      Include appropriate disclosure regarding the redemption restrictions
        imposed by Section 403(b)(11) in any sales literature used in connection
        with the offer of the contract;

3.      Instruct sales representatives who solicit participants to purchase the
        contract specifically to bring the redemption restrictions imposed by
        Section 403(b)(11) to the attention of the potential participants;

4.      Obtain from each plan participant who purchases a Section 403(b) annuity
        contract, prior to or at the time of such purchase, a signed statement
        acknowledging the participant's understanding of (1) the restrictions on
        redemption imposed by Section 403(b)(11), and (2) other investment
        alternatives available under the employer's Section 403(b) arrangement
        to which the participant may elect to transfer his contract value.

B)      REPRESENTATION PURSUANT TO SECTION 26(e) OF THE INVESTMENT COMPANY ACT 
OF 1940: The Company and Registrant represent that the fees and charges to be 
deducted under the variable annuity contract described in the prospectus 
contained in this registration statement are, in the aggregate, reasonable in 
relation to the services rendered, the expenses expected to be incurred, and 
the risks assumed in connection with the contract.

<PAGE>   105
                                   SIGNATURES

   
        As required by the Securities Act of 1933 and the Investment Company Act
of 1940, the Registrant certifies that it meets the requirements of Securities
Act Rule 485 for effectiveness of this Registration Statement and has caused 
this Post-Effective Amendment to the Registration Statement to be signed on 
its behalf, in the City of Los Angeles, and the State of California, on this 
25th day of January 1999.
    

                      VARIABLE SEPARATE ACCOUNT
                             (Registrant)

                      By: ANCHOR NATIONAL LIFE INSURANCE COMPANY
                             (Depositor)


                      By: /s/ JAY S. WINTROB
                         ----------------------------------------
                             Jay S. Wintrob
                             Executive Vice President

                      By: ANCHOR NATIONAL LIFE INSURANCE COMPANY
                          (Depositor, on behalf of itself and Registrant)


                      By: /s/ JAY S. WINTROB
                         ----------------------------------------
                             Jay S. Wintrob
                             Executive Vice President


        As required by the Securities Act of 1933, this Post-Effective Amendment
to the Registration Statement has been signed by the following persons in the
capacities and on the dates indicated.

   
<TABLE>
<CAPTION>
SIGNATURE                     TITLE                           DATE
- ---------                     -----                           ----
<S>                       <C>                                <C>

ELI BROAD*                 President, Chief
- --------------------       Executive Officer and
Eli Broad                  Chairman  of the Board
                          (Principal Executive Officer)


SCOTT L. ROBINSON*         Senior Vice President
- --------------------       and Director
Scott L. Robinson         (Principal Financial Officer)


SCOTT GILLIS*              Senior Vice President
- --------------------       and Controller
N. Scott Gillis           (Principal Accounting Officer)


JAMES R. BELARDI*          Director
- --------------------
James R. Belardi


JANA W. GREER*             Director
- --------------------
Jana W. Greer

                                                              
/s/ SUSAN L. HARRIS        Director                           January 25, 1999
- --------------------
Susan L. Harris


PETER MCMILLAN*            Director
</TABLE>
    

<PAGE>   106
<TABLE>
<CAPTION>
SIGNATURE                     TITLE                           DATE
- ---------                     -----                           ----
<S>                       <C>                                <C>
- --------------------
Peter McMillan


JAY S. WINTROB*            Director
- --------------------
Jay S. Wintrob


JAMES W. ROWAN*            Director
- ---------------------
James W. Rowan



* By: /s/ SUSAN L. HARRIS  Attorney-in-Fact
     --------------------
         Susan L. Harris
</TABLE>

   
Date:  January 25, 1999
    

<PAGE>   107
                                  EXHIBIT INDEX


   
<TABLE>
<CAPTION>
Exhibit               Description
- -------               -----------
<S>               <C>
Exhibit 10          Consent of Independent Accountants

</TABLE>
    


<PAGE>   1
                                                                      EXHIBIT 10





                       CONSENT OF INDEPENDENT ACCOUNTANTS
                       ----------------------------------


We hereby consent to the use in the Prospectus and Statement of Additional 
Information constituting part of this Registration Statement on Form N-4 for 
Variable Separate Account (Portion Relating to the POLARIS Variable Annuity) 
of Anchor National Life Insurance Company of our report dated November 9, 
1998, relating to the consolidated financial statements of Anchor National Life 
Insurance Company, and of our report dated January 27, 1998, relating to the 
financial statements of Variable Separate Account (Portion Relating to the 
POLARIS Variable Annuity), which appear in such Prospectus and Statement of 
Additional Information, respectively.  We also consent to the reference to us 
under the heading "Independent Accountants" in such Prospectus and to the 
reference to us under the heading "Financial Statements" in such Statement of 
Additional Information.




PricewaterhouseCoopers LLP
Los Angeles, California
January 22, 1999


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