I have in front of me a 1986 Ross catalog which I need to fax a page of to Larry Black. Fax # Larry?
There are two series of Ross Signatures (at least in 1986) which leads to this Taiwan / US handmade confusion. The 200 series bikes look like decent Taiwan made sport bikes. The Signature Triad 508 is a handmade bike available with sizing every 2 cms, any Ross color, in Columbus SL with an SP downtube, Eisho lugs, Shimano dropouts and Shimano 600 components.
I suspect other sizes and components were available for the top model because the one pictured is a 56cm and the supposed sizes run 51, 53 etc. and the lower 294S bike use Campagnolo Triomphe components.
Joe Bender-Zanoni
Manhattan NY today