Product Code: This was not applied consistently.Occasionally, custom frames might not have the same size as indicated by the serial number.
Mountain bikes required rounding since they were built in one or two inch size increments. For example, a 55cm frame had a serial number starting with 550.
#Schwinn bicycle serial number decoder code#
Size Code: The size code represented the center to top seatmast measurement, rounded to the nearest 5mm.This system started in use during the mid- to 1994’s. During the peak of the bike boom, Schwinn would add another digit, sometimes producing as many as 500 frames a month.įor example, H7634 is the thirty-fourth frame or fork scheduled during August of 1976. Sequence Number: This two digit number represents the nth frame and/or fork scheduled during the month.Year Code: This two digit code is the last two digits of the year – 86 is 1986.Sequence Number: This two digit number represents the nth frame and/or fork scheduled during the month.įor example, H763 is the sixty-third frame or fork scheduled during August of 1967.Year Code: This one digit code is the last digit of the year – 6 is 1966.Because I is not used, September=J and December=M. Month Code: This one letter code corresponds to the month with A=January, B=Febuary and so on.This system was used from January 1966 through 1969. Here’s a table of the codes and their manufacturing dates: When the B’s started out, they started with B10. It was a sequence consisting of a letter followed by two digits, starting with A10, followed by A11 and so on until A99.
This system was used from Spring of 1959 to the end of 1965. Numbers mostly followed a three-digit format – often but not necessarily with a “P” as the prefix.īy early 1959, serial number 949 had been reached, necessitating a new system. Unfortunately, an office fire in 1948 destroyed the Paramount records.
#Schwinn bicycle serial number decoder serial numbers#
Little is known about serial numbers for bikes built after World War II. We found a very early Paramount – claimed to be a 1938-9 vintage – with serial number A545. This seems to have been a system started by Emil Wastyn. The very first Paramounts seemed to have had serial numbers starting with “A” followed by two or three digits.
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