I just picked up a sweet Kool Lemon yellow Schwinn Continental at an estate sale. It's in excellent condition and just needs some cleaning and detailing. My question is the serial number -- I want to identify the year of the bike. When I entered the serial number on the Schwinn serial number lookup , it came back as invalid. So, the serial number which appears under to theft of the name place is
J 006609.
Any help deciphering this would be greatly appreciated.