I apologize for even asking, but I'm going crazy trying to date an early Model 60 for a friend. I can't find the serial number anywhere in the Standard Catalog.
The serial number has a 1x prefix and then only three digits. Heres a couple of pics. It's pinned, but I'm not sure if it's recessed.
The serial number has a 1x prefix and then only three digits. Heres a couple of pics. It's pinned, but I'm not sure if it's recessed.

