It’s a C8-16, same as yours serial # 698. I paid $100. for it with a refinished cabinet. It is untouched chassis wise and i think it had an easy life. Along with doing the caps, a lot of the wiring is crispy and will need doing as well. here’s some pics of the chassis. I think I downloaded the schematics and I have to find them. Thanks for the speaker cone advice!
Gary
