I'll weigh in on the Colnago on Ebay (and at my weight that could be dangerous!). I think it looks pretty nice. It looks original. The cable routing over the top of the bottom bracket, rounded section chain stays, suggest pre-1981. I agree that the stamped seat stays suggest 1979 or newer. From my research, 1980 and newer models (typically) have the white background decal motif. So, I say 1979 is correct. And yes, chrome forks were available earlier (I have a 1977 with chrome forks and chrome rear triangle). The "chrome" chain stay decal is original, was typical of this era on US export Bikes, and is also currently unavailable to my knowledge. (Later chain stay decals are available that do not wrap around the rear derailleur braze on). So, my guess is, original paint and decals.
It is my size and I would be interested in buying it, but already have three Supers and three Mexicos from the 1977 to 1983 era. But, .... no blue ones. Hmmmm.... Ray! Help! What was that limit?
Jeff Pyzyk
Milwaukee, WI