Originally Posted by
satbuilder
Last night I took the wheels off for a good cleaning and found the number 77 stamped on the outboard rr derailleur side dropout, so I guess that answers my question.
That "77" doesn't date the bike - those Colnago dropout stamped number are notoriously indecipherable. I do think it's late 70's, based on the graphics and frame details. So it could plausibly be '77, but that would be coincidental vis a vias the dropout stamp. If the scalloped seatstay caps do not say Colnago in them, that would be another clue that the bike is mid-to-late 70's.
BTW, that's a very nice Colnago - those pre-1980 Colnagos are beginning to creap up in value as the earlier ones become more rare, despite the fact that that is a period when Colnago was notoriously experiencing quality control issues as they subed more frames to meet increasing demand.