>>1846784>sears free spiritBefore I picked it up I figured it was something like that, but it just seems a bit nicer than other department store bikes like this I've had.
Actual lugs, dropouts look better, cottered cranks instead of a one-piece, feels lighter than I expected, etc
bikehistory.org's schwinn serial number lookup seems to think it's a 57 schwinn based on that top serial number, but I can't match this frame up with anything from their catalogue, and it seems more like mid 70's to me.