It did prove to be a 50cm but I got it anyway figuring I can clean it up and find someone who will give it a good home. So here's some pix for maybe making a better ID. Drops are short Campys and chromed with the right chainstay chromed. Does have SLX steer tube and still had the cork plug in the bottom of the steerer. The tape tag on the steerer is pretty much obliterated