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Db11944
2003
The Schwinn bike serial number H19577 was made in 1951.
August 1974
1984
November of 1981.
June, 1967
85
FEBRUARY 1974
I just searched for the serial number of my Schwinn Collegiate. From the same source it appears that mr850439 was manufactured in December 1980. Here is a reference: http://www.bunchobikes.com/serialnumber5.htm
Anything I've seen on Schwinn has the k#'s ending K499***, would appreciate any help, thanks.
If the serial # is on the headtube, that bike was made in Chicago in October 1975.