Originally Posted by
The Golden Boy
Any Suntour over pre 1985 Shimano stuff.
I'd go shopping for a V-GT Luxe. Really, one of the all time great derailleurs- and it was inexpensive enough to be considered "low end" even though it was a complete stud, not only for its time- but a completely all around good, high performance RD.
Seconded. The SunTour V-GT Luxe is the best vintage wide range derailleur ever made. Outshifted Campagnolo Rally, Huret Duopars, when new, and aged better than those options. Even nice enough to install on high end touring bikes of the era.