Just found this 3/8 drive ratchet, looks like pre 1950. Some chrome remains, reverse lever. Logo is a small S W in a oval. Followed by 4C50-A-. The head is oval reminiscent of Proto. Head held together with 2 large philips screws. Did a quick look on alloy artifacts, no luck. I have a large quanity of tools back to the 20s , and never seen the s w stamp. Any ideas? Camera still not talking to the computer.