I have picked up what looks like a mid '90s Serotta Cross bike. It has "G.P. Suisse" on the top tube and has a sticker showing "C3S Colorado" tubing. I am sure the parts aren't original, as it has Shimano XTR drive train with Dura Ace hubs. I have tried looking at the '90 Catalogs, but have been unable to find anything. The serial #starts with C54******, I don't remember off hand the rest of it. Any info would be appreciated.