<PAGE>
ALLMERICA FINANCIAL LIFE INSURANCE AND ANNUITY COMPANY
FIRST ALLMERICA FINANCIAL LIFE INSURANCE COMPANY
SUPPLEMENT TO PROSPECTUS DATED MAY 1, 1999
ALLMERICA SELECT SEPARATE ACCOUNT
(ALLMERICA SELECT CHARTER)
* * *
Effective September 1, 1999, the following information relating to the Select
Aggressive Growth Fund and Select Capital Appreciation Fund is amended as
follows:
Under 5. EXPENSES in the Profile, the expense information for the Select
Aggressive Growth Fund is amended as follows:
<TABLE>
<CAPTION>
EXAMPLES:
TOTAL ANNUAL EXPENSES
AT END OF
---------
TOTAL TOTAL
ANNUAL ANNUAL TOTAL
INSURANCE FUND ANNUAL (1) (2)
FUND CHARGES CHARGES CHARGES 1 YEAR 10 YEARS
- -------- ------- -------- ------- -------- --------
<S> <C> <C> <C> <C> <C>
Select Aggressive Growth Fund....... 1.44% 0.89% 2.33% $23 $263
</TABLE>
Under (3) ANNUAL FUND EXPENSES in the SUMMARY OF FEES AND EXPENSES section,
the table and footnotes are amended as follows:
<TABLE>
<CAPTION>
MANAGEMENT FEE
(AFTER ANY OTHER EXPENSES TOTAL FUND EXPENSES
VOLUNTARY (AFTER ANY (AFTER ANY WAIVERS/
FUND WAIVERS) REIMBURSEMENTS) REIMBURSEMENTS)
- -------- ------- --------------- --------------
<S> <C> <C> <C>
Select Aggressive Growth Fund................... 0.82%*** 0.07% 0.89%(1) (2)***
Select Capital Appreciation Fund................ 0.94%*** 0.10% 1.04%(1) (2)***
</TABLE>
*** Effective September 1, 1999, the management fee rates for the Select
Aggressive Growth Fund and Select Capital Appreciation Fund were revised.
The Management Fee and Total Fund Expenses shown in the table above have
been adjusted to assume that the revised rates took effect on January 1,
1998.
Under footnote (2), the percentage for the Select Aggressive Growth Fund is
changed to 0.86%.
The expense examples for the Select Aggressive Growth Fund are amended as
follows:
<TABLE>
<CAPTION>
1 YEAR 3 YEARS 5 YEARS 10 YEARS
------ ------- ------- --------
<S> <C> <C> <C> <C>
(1)
Select Aggressive Growth Fund........... $23 $72 $123 $263
1 YEAR 3 YEARS 5 YEARS 10 YEARS
------ ------- ------- --------
<S> <C> <C> <C> <C>
(2)
Select Aggressive Growth Fund........... $26 $79 $135 $288
1 YEAR 3 YEARS 5 YEARS 10 YEARS
------ ------- ------- --------
<S> <C> <C> <C> <C>
(3)
Select Aggressive Growth Fund........... $28 $87 $148 $312
</TABLE>
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Under INVESTMENT ADVISORY SERVICES, the management fee schedule for the
Select Aggressive Growth Fund and Select Capital Appreciation Fund is amended
as follows:
<TABLE>
<S> <C> <C>
Select Aggressive Growth Fund First $100 Million 1.00%
Next $150 Million 0.90%
Next $250 Million 0.80%
Next $500 Million 0.70%
Over $1 Billion 0.65%
Select Capital Appreciation Fund First $100 Million 1.00%
Next $150 Million 0.90%
Next $250 Million 0.80%
Next $500 Million 0.70%
Over $1 Billion 0.65%
</TABLE>
* * *
Effective as of July 1, 1999, the name of the Sub-Adviser of the Select
Emerging Markets Fund has been changed from Schroder Capital Management
International Inc. to Schroder Investment Management North America Inc.
SUPPLEMENT DATED SEPTEMBER 1, 1999