It'd have to be at least 1987. It's a freewheel not a freehub (I think, I'm goofing off at work right now - I'll check tonight) so it's pre-1990 or so. Is that a narrow enough range? Somebody tell me where to look for a serial number and how to read it and I'll try to narrow it further.

Are you looking for something like that? I might could be persuaded to part with it. This will make my 4th project bike. I'm sure you're familiar with the disease. I pulled out my old bike to fix it up and in no time at all others are following me home.