Hmm so a chainstay with an indentation indicates Reynolds? I just bought a Ross Professional bike the guy claimed was Reynolds 851 or whatever that number is, but the sticker is gone ( can still see stickyness though). It has that indentation you spoke of though. Also I haev a colnago super with the same deal. Never knew what kind of tubing that is either. Anyone know what a colnago super from 1978/80 would be?