My guesstimate is the JCH is 62-3, they retired the name after that. The Columbia is early-mid 50s, and the Schwinn is a 63, no way it's a 53! And good luck to that dude getting anywhere near that for those heaps!!!! :lol: P.S., I don't know it all either, I just have a pretty good chunk o' knowledge about ol' bikes! :mrgreen: -Adam