Small part to add to the thread, concerning the threadless forks. I have a GT Borrego 93' that has a threadless set up. The HS is a Tiago alchemy. The top cap says Aheadset and Dia-comp. The forks are stamped 92 and have some name that starts with an S, has what looks like a dove or partridge right beside it.

Short version, they were around in 92-93 also.