Originally Posted by
chevalier
I had thought I saw the "80" on the derailleur.
https://vintagecannondale.com/info/campagnolo/
1973 – 1979 The year of crank manufacture is the last digit in a diamond
That gives you a 1978 crankset and a 1980 rear derailleur. And, probably somewhat newer derailleur pulleys.
The early Nuovo Record Front derailleur cages also had no holes. Yours has 3 holes:
VeloBase.com - Component: Campagnolo Nuovo Record 0104007 (1982 - 1987, 3-hole standard band)
That dates it to 1982 to 1985.
Overall it isn't a big deal, but it may mean the bike was restored, or assembled from parts at some point in the past, or has had a history of heavy use and worn parts.