I'm trying to date a Campy Turismo rear derailleur that looks exactly like a
cadmium plated version of the later Gran Sport, with the exception of stamped
cage pulley cage plates. I found the 1970 Gran Turismo in Chuck's time line,
but not this one. It has the "no teeth" ball bearing pulleys common to the
earlier ones. Any clue to the years of production? It's not in Catalogue 13
or 14.
Stevan Thomas
Alameda, CA