I have a late 60's/early 70's Bottechia "De Luxe Model" (so it says on the top tube) that came with a Simplex drop parallelogram rear derailleur. Now I got an Ofmega Master slant parallelogram unit which I want to install. However the adaptor claw doesn't fit - I presume I need a Campy style?
Where does one find adaptor claws? fleabay came up empty.