I have a Campagnolo Super Record rear derailleur Patent 78, 2nd generation, which has aluminum alloy upper pivot bolt and gear spring bolt. It also has Super Record engraved in the back of the inner parallelogram arm, and solid pivot pins. My question is how long were the alloy bolts supplied before going back to titanium as was spec'd on the original Super Record, and when were the solid pivot pins replaced with the hollow end rivet looking pins? The next earliest date I have on a SR is patent 82, and it has titanium bolts and rivet looking pins, which appear to be stainless steel as opposed to alloy for the solid pins. Also, when the pins changed, were the brass ferrules inside the pivot still used?
Thanks for info,
Steve Benson
Charlotte, NC