I bought this ride as a beater from a pawn shop back in 1999 or 2000. I've always kind of wondered what exactly I'm rolling around on, and it finally occurred to me to snap some pics and ask.

I know for a fact that the bars, grips, brakes, levers, pedals and tyres are not originals, as they've been replaced since I've owned the bike. Anything else might be original, or might've been a previous owner's replacements. Looks like the original paint job was yellow (at least at the back), going by the bits showing through where the black has chipped off. It was already black (and chipped) when I picked it up. I don't know what the lines in the black paint are, or whether they're intentional or just poor quality paint wearing out in an interesting way.

Any ideas what this is? What it was meant for? How much of it looks like it's still original? My best guess would be something mid-90's, based on the condition it was in when I bought it (though it could be more recent and just really badly neglected), but I really have no idea.

(Yes, I do ride this without a seat clamp -- it's never had one as long as I've owned it, but the deformed seat tube combined with the slack angle seems to hold the seat in place ok.)

On with the pics: