THIS CHART APPLIES TO CHICAGO SCHWINN`S ONLY.
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Later Schwinn serial numbers / years made. Bicycles from Japan made in the 70’s have a production month letter in either the first or second position and a production year number in the other (first or second) position. Dec 23, 2019 The model year of a Schwinn bike produced in 1948 or later can be determined by locating the bike's serial number and comparing it to a serial number and date chart. Serial number information from before 1948 was lost in a factory fire and is extremely sparse. Schwinn serial numbers may be found in several different places on the bike. Or you can go to that old Angelfire website. Just don't click on any of the pop-up ads. Recorded on after the sun kinda went down, which is why th. Schwinn Dates Codes: All Schwinn serial numbers before August 17, 1948 were lost in an office fire. Serial numbers were under the bottom hanger bracket until 1952 when they were moved to the left rear dropout. They were moved again in 1972 to the head tube. Several different numbering systems were used and sometimes the same numbers were reused. Schwinn Bike Dating After 1965, Schwinn serial number sequences, while appearing to be confusing on first sight, follow several general rules. I hope you expand back in time before the fire and come up with some sort of framework for the prewar years '33-'41 and the '46-'48 bikes.
SERIAL NUMBER LOCATION:
NUMBERS ARE NOW LOCATED ON THE LOWER LEFT OF THE HEADTUBE(By The Schwinn Badge On The Front OF The Frame)
Schwinn Serial Numbers Dates
--------------------------------------------------------------------------------------------------------------NUMBERING SYSTEM:
THE FIRST 'LETTER' IS THE MONTH, THE SECOND 'LETTER' IS THE YEAR.
THE LETTERS ' I ' and ' O ' ARE SKIPPED
TO AVOID CONFUSION WITH NUMBERS 'ONE' and 'ZERO'.
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*****
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*****
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*****
Schwinn Cal Serial Number
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*****
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THIS CHART APPLIES TO CHICAGO SCHWINN`S ONLY.
How To Read A Schwinn Serial Number
During the 1980s, Greenville used the old letter-digit(e.g. F8 = June 1988)system which Chicago abandoned in 1965,
when it changed to the two-letter system.
ON NEWER BIKES:
you can find 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.
EXAMPLE:
3654 is 12/31/84 or 94 or? you determine decade.