NOS Campagnolo Gran Sport Rear Derailleur: Steel Plated Bronze - 1950's-1960's - 1012/4
Absurdly clean untouched example of the early Gran Sport rear mech. This one is a more common mid 1950's or early 1960's model. It features the toothless ball-bearing jockey wheels stock from those years, where the late 60's and early 70's versions had standard toothed pulleys.
In 1951, Campagnolo shook the cycling world with the first prototypes of this GS derailleur which was the foundation for most modern derailleurs before Suntour's slant parallelogram. The first couple years of these were made in low numbers, and sell for crazy money (several thousand dollars!). They were made of bronze, and plated with steel/chrome.
This one has the standard mounting bolt for basic derailleur hangers, and I'm including a (used) claw hanger to fit frames that lack a derailleur hanger.
New old stock. This one came from the stock of a now closed San Francisco bike shop along with a pile of other never used parts from the 1930's to 1960's. Pulleys are buttery smooth and show no wear. Pivots and springs are tight and smooth. Hardware is perfect. Finish is damn close to perfect. Only the smallest spots of VERY light shop wear. Appropriate for even the cleanest of show bicycles.
- Model: 1012/4