The "original" (as I received the bike) cranks and hub locknuts are both dated 1974, which is what I went with originally, but
Chuck's and Eric E's timelines seem to put the frameset closer to 1973, so I've already changed the date in the album title and the names of the pics to reflect that. This new series of posts makes things a bit muddier though. This includes Charles' most recent reply to Brad's post.
I would not assume hard and fast dates for any of this stuff. Earlier parts could well have ended up on later frames, either by special order, or to clear out older parts inventory. We still don't have documentation on when, exactly, Colnago formally introduced the Super Pantografata. I've always assumed it was Fall of 1973, but it could have been earlier. The brochure I have is undated.
so, Mark's frame could be a 1974 and could have some earlier parts on it. The first formal pantographing scheme and the older milled and drilled stuff probably went out at the same time for awhile, if not for a longer time.
Back then, as has been noted many times, they didn't care about this stuff. Have the bikes look good, and get 'em out the door, that was the deal, seems to me. Maybe we should be a bit less worried about the exact moment when a given thing was made.