If you have a Schwinn from this era, please, PLEASE send us pictures of your bike and serial number ().ĭownload Lagu Pencinta Wanita. For pre-1948 Schwinns try taking out the crankset to check for a date code. All serial number records before were lost in a factory fire. From 1958 on, several different coding systems were used, from which the manufacture date (and often the assembly date) can be decifered. User Name: * Password: * Schwinn Serial Numbers and Date Codes Dates between 19 are available because Schwinn kept good records.