Campy ID - RD with no markings?
I've got this Campy rear derailer with model name or markings at all. It's NOS but does have flaws - some scratches because one limit screw was missing from the factory.
Any ideas what group this is - I don't even know if it's 7,8, or 9 speed! Is it typical to not even have a model number on the back side?