It is possible that I managed to mess up two completely different things.
The first is the frames built for Eddy Merckx and his colleagues on the Molteni and Fiat teams - indeed for 6 years (1971-1976 seasons) and 1 year (1977 season) respectively.
The second is EMC production - and it's complicated:
- frames painted dark yellow (Patrick Sercu rode on such a frame in 1980-1983)
- Orange frames "like Molteni" but not part of the Team Issue series (1980-1982)
- Team Issue frames (from 1983): silver Fiat - produced briefly in small numbers, FAEMA - produced for a long time, especially the Corsa model (until 1994) and Molteni - produced intermittently until 2006 (various models - including alu).