Most cranks I've used that were older were either marked some how or I remembered them by sight. Several are still around and can be found at places like BP, TW and other places of the such.
Look at the hooks. Are they sharp? Are they thick wire or look like trash. How flimsy are the bills? How's the paint quality.
By the way you described his set up, shop etc, I would assume he has some good stuff. Most guys like that don't buy elcheapo junk.