[pwd72s]

Originally Posted by rockfan4

This one looks good as any.
https://sites.pitt.edu/~blair1/snapon.html

I'm using my father's Snap-On ratchets. The 3/8 is from 1953, the 1/2 is from 1947. He also had a black oxide 3/8 that I had to trade with the snap-on guy because he didn't have a rebuild kit for it. My "new" ratchet is from 1987.
There's a couple more in the back garage. I imagine they're all the same vintage.

Thanks for this...I have an old valve adjusting tool of dad's..a roughly 5"long handle with a knob on top that controls a sliding flat screwdriver blade that is inside a 1/2" drive solid square with a spring loaded pin to lock a socket in place...now I know it was made in '47...boy, that's a tiny mark, used a magnifying glass to find it.