Originally Posted by
pastorbobnlnh
If you need touring gears, the Sachs-Huret Eco-Duopar shifts way better than a Campy Rally. I know they were available in the early '80s. Not certain about the '70s.
The Duopar Eco steel derailluer (originally made by Huret before Sachs enterted the picture) was preceded by the part-titanium Duopar, which was one of the best friction shifting derailleurs ever made. I believe the Duopar was introduced circa 1975.