Originally Posted by
TimmyT
I think headset, crankset, brakes, fd, stem, and seatpost binder bolt are original. Yeah, and maybe I misspoke about QC. I think the shifting is cleaner with 6400 series. QC is about the same.
It came to me mainly as "original" (including the OEM chain) but it's not a museum piece, hence my modifications. If you're only going by the catalogs, I think that is a mistake as there was variation in what the companies put on the bikes when shipped as well as modifications at the shop. There are always two steps from the catalog: factory assembly and bike shop assembly.
Given that the brakes are Shimano 600 Ultegra, which didn't come out until the the 1988 model year, it's very hard to imagine that they could have bee installed as OEM on a frame built in very late 1985, either at the factory or LBS. The most plausible scenario fro the bicycle is that owner stripped it of everything that he could, using common hand tools. This would have left components such as the crankset, headset and chain. He may not have realized that you could remove the front derailleur without breaking the chain and left it also.