i got a schwinn continental as a gift. after digging for a few days, i found several sites that helps me decipher the serial number. Problem is, none of them list mine (MG021988) or even MG _ _ _ _ _ _ (MG follow by 6 digits)

any thoughts?

December 1971 Chicago Schwinn.

http://www.bunchobikes.com/serialnumber5.htm

thanks a lot :)