It's a PX. I had called and talked to the seller, he knew full well what it was and had bought it original. I called again to go buy the thing, but it had just been picked up; I couldn;t get there right off and frankly another PX I really don't need. Here's hoping it wound up in good hands.

As to fixieing it, the bike had been so rebuilt I can't see the harm. Sugino mighty Cranks, Suntour mechs. The PX is pretty braze on free, so no wild hacking of bits can occur.