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Schwinn Serial Numbers, The Complete List! Important Information!! The following pages were created by Brian Crawford with the intent of sharing information with all bicycle enthusiasts! The Schwinn serial numbers that date the bike to the fall of 1954 or 1956, but I believe the Serial numbers for 54 and the 56 were located on the Left Rear Dropout - not located on the bottom bracket of the pedal crank housing.
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Serial numbers are now on the lower left of the head tube, by the Schwinn badge on front of the frame
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Numbering system:
The first letter is the month, the second letter is the year.
I and O are skipped so as to avoid confusion with 1 and 0.Examples:
AF***** = Jan. 1970,….. (“A” = Jan., “F” = 1970)
GL***** = July. 1975,….. (“G” = July., “L” = 1975)
MR***** = Dec. 1980,….. (“M” = Dec., “R” = 1980), etc.
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JANUARY, —————————- AF*****
FEBRUARY, ————————– BF*****
MARCH, ——————————- CF*****
APRIL, ——————————— DF*****
MAY, ———————————– EF*****
JUNE, ———————————- FF*****
JULY, ———————————- GF*****
AUGUST, —————————– HF*****
SEPTEMBER, ————————- JF*****
OCTOBER, ————————— KF*****
NOVEMBER, ————————- LF*****
DECEMBER, ————————- MF*****
JANUARY, —————————- AG*****
FEBRUARY, ————————– BG*****
MARCH, ——————————- CG*****
APRIL, ——————————— DG*****
MAY, ———————————– EG*****
JUNE, ———————————- FG*****
JULY, ———————————- GG*****
AUGUST, —————————– HG*****
SEPTEMBER, ————————- JG*****
OCTOBER, ————————— KG*****
NOVEMBER, ————————- LG*****
DECEMBER, ————————- MG*****
JANUARY, —————————- AH*****
FEBRUARY, ————————– BH*****
MARCH, ——————————- CH*****
APRIL, ——————————— DH*****
MAY, ———————————– EH*****
JUNE, ———————————- FH*****
JULY, ———————————- GH*****
AUGUST, —————————– HH*****
SEPTEMBER, ————————- JH*****
OCTOBER, ————————— KH*****
NOVEMBER, ————————- LH*****
DECEMBER, ————————- MH*****
JANUARY, —————————- AJ*****
FEBRUARY, ————————– BJ*****
MARCH, ——————————- CJ*****
APRIL, ——————————— DJ*****
MAY, ———————————– EJ*****
JUNE, ———————————- FJ*****
JULY, ———————————- GJ*****
AUGUST, —————————– HJ*****
SEPTEMBER, ————————- JJ*****
OCTOBER, ————————— KJ*****
NOVEMBER, ————————- LJ*****
DECEMBER, ————————- MJ*****
JANUARY, —————————- AK*****
FEBRUARY, ————————– BK*****
MARCH, ——————————- CK*****
APRIL, ——————————— DK*****
MAY, ———————————– EK*****
JUNE, ———————————- FK*****
JULY, ———————————- GK*****
AUGUST, —————————– HK*****
SEPTEMBER, ————————- JK*****
OCTOBER, ————————— KK*****
NOVEMBER, ————————- LK*****
DECEMBER, ————————- MK*****
Schwinn Cal Serial Number
JANUARY, —————————- AL*****
FEBRUARY, ————————– BL*****
MARCH, ——————————- CL*****
APRIL, ——————————— DL*****
MAY, ———————————– EL*****
JUNE, ———————————- FL*****
JULY, ———————————- GL*****
AUGUST, —————————– HL*****
SEPTEMBER, ————————- JL*****
OCTOBER, ————————— KL*****
NOVEMBER, ————————- LL*****
DECEMBER, ————————- ML*****
JANUARY, —————————- AM*****
FEBRUARY, ————————– BM*****
MARCH, ——————————- CM*****
APRIL, ——————————— DM*****
MAY, ———————————– EM*****
JUNE, ———————————- FM*****
JULY, ———————————- GM*****
AUGUST, —————————– HM*****
SEPTEMBER, ————————- JM*****
OCTOBER, ————————— KM*****
NOVEMBER, ————————- LM*****
DECEMBER, ————————- MM*****
JANUARY, —————————- AN*****
FEBRUARY, ————————– BN*****
MARCH, ——————————- CN*****
APRIL, ——————————— DN*****
MAY, ———————————– EN*****
JUNE, ———————————- FN*****
JULY, ———————————- GN*****
AUGUST, —————————– HN*****
SEPTEMBER, ————————- JN*****
OCTOBER, ————————— KN*****
NOVEMBER, ————————- LN*****
DECEMBER, ————————- MN*****
JANUARY, —————————- AP*****
FEBRUARY, ————————– BP*****
MARCH, ——————————- CP*****
APRIL, ——————————— DP*****
MAY, ———————————– EP*****
JUNE, ———————————- FP*****
JULY, ———————————- GP*****
AUGUST, —————————– HP*****
SEPTEMBER, ————————- JP*****
OCTOBER, ————————— KP*****
NOVEMBER, ————————- LP*****
DECEMBER, ————————- MP*****
Schwinn Chicago Serial Numbers Number
JANUARY, —————————- AQ*****
FEBRUARY, ————————– BQ*****
MARCH, ——————————- CQ*****
APRIL, ——————————— DQ*****
MAY, ———————————– EQ*****
JUNE, ———————————- FQ*****
JULY, ———————————- GQ*****
AUGUST, —————————– HQ*****
SEPTEMBER, ————————- JQ*****
OCTOBER, ————————— KQ*****
NOVEMBER, ————————- LQ*****
DECEMBER, ————————- MQ*****
JANUARY, —————————- AR*****
FEBRUARY, ————————– BR*****
MARCH, ——————————- CR*****
APRIL, ——————————— DR*****
MAY, ———————————– ER*****
JUNE, ———————————- FR*****
JULY, ———————————- GR*****
AUGUST, —————————– HR*****
SEPTEMBER, ————————- JR*****
OCTOBER, ————————— KR*****
NOVEMBER, ————————- LR*****
DECEMBER, ————————- MR*****
JANUARY, —————————- AS*****
FEBRUARY, ————————– BS*****
MARCH, ——————————- CS*****
APRIL, ——————————— DS*****
MAY, ———————————– ES*****
JUNE, ———————————- FS*****
JULY, ———————————- GS*****
AUGUST, —————————– HS*****
SEPTEMBER, ————————- JS*****
OCTOBER, ————————— KS*****
NOVEMBER, ————————- LS*****
DECEMBER, ————————- MS*****
JANUARY, —————————- AT*****
FEBRUARY, ————————– BT*****
MARCH, ——————————- CT*****
APRIL, ——————————— DT*****
MAY, ———————————– ET*****
JUNE, ———————————- FT*****
JULY, ———————————- GT*****
AUGUST, —————————– HT*****
SEPTEMBER, ————————- JT*****
OCTOBER, ————————— KT*****
NOVEMBER, ————————- LT*****
DECEMBER, ————————- MT*****————————————————————————————————-
During the 1980s, Greenville used the old letter-digit
(e.g. F8 = June 1988) system which Chicago stopped using in 1965,
changing to the two-letter system.For newer bikes:
there’s a 4 digit serial number lightly stamped onto the headbadge.
The first three digits are the numerical day of the year,
and the last digit is the last digit of the year.
1980s Schwinn Serial Numbers
Example:
3654 is 12/31/84 or 94 or (?).