Hi all, this is a can of worms, I'm sure someone out there knows the answers. This is only referring to the Gran sport, Record and Nuovo record rear deraileurs. NR RD 1967 - 1987? Record RD 1963 - 1973. GS single cable RD 1951 - ?
What I would find interesting is when was the GS RD dropped from production? Was it 1963 with the introduction of the Record, or was it 1967 with the introduction of the NR? One would not think all 3 were in production at the same time, esp when others where being made as well.
Both the GS and NR had variations during there life, but to be expected with the relative long runs, and the leaps and bounds in technology during the time, not heard anything about variations within the Records 10 year run...........regards wayne davidson Invers NZ..........