SUNN,
what about serial no. data, production numbers by year and model, (amp not cab) especiallly pre 1970. Any known common mods, ala bassman for leadwork, circuit breakers or dyna-kits. Any vintage equipment company that can help us return a amp to original specs, (knobs, grill cloth, handles, filter caps, etc.). such as transformers from Magnaquest.
thank you for your consideration