Originally Posted by
Grand Bois
They didn't put the bottom of the line Prestige on the top of the line PX10. Mine had Criterium rear and Supert Competition front derailers when I bought it new. I still have them. The front is a parallelogram, not piston type. His rear derailer may be an earlier version of the Criterium than mine.
I think the early '70s had the piston-type front mech.
What about metal-clamp front derailleurs versus delrin-clamp front derailleurs, all piston-type? Model difference? Year difference? Just random pick of parts on the assembly line? When a strike is impending we use the delrin, and when there's been a contract raise we use the metal?