Hence Paramount serial numbers are unique to Paramounts and serve as a tally of Paramount production, while serial numbers on the fillet-brazed models were mixed in with other Schwinn models. This is also why the fillet-brazed models came in the same colors as lower-priced Schwinns, which contributed to their obscurity. Bicycle Serial Number Lookup 1960 Chicago Schwinn Corvette Mens Bike Bicycle Serial # K011511 Vintage Rev up and get riding on your very own Corvette! This 1960 Schwinn men's bike has a serial number of K011511 and measures approximately 32' side to side at the handlebars, 69' front to back, and 41' top to bottom, with a 26' tire.
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. ————————————————————————————————————--
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.