hello, my heavy chromed steel late 60's Campagnolo Gran Turismo rear changer has the range stamped into the lower spring houseing...13-36--------36-54.... i recall seeing a Nuovo Record rear long cage on a 70's Mondia Special Alpine w/ the same range stamped this time on the face of the jockey wheel cage. that bike sold on ebay for $318. (200055234613) all campy save some Phil hubs....it came complete w/ light rust....very interesting bike. charlie flaherty baltimore maryland usa