please date a 1/2" craftsman socket set

[drabe7]

My grandpa gave me a 1/2" craftsman sockets set that was my great grandfathers. We think its early 40's. Its mostly craftsman with a few williams and armstong pieces. Most of the chrome were replacements or just add ons for one job. there is a set of japanese 3/8" sockets in there that i plan to remove. it has a female drive ratchet. i cant find much on the web so are they rare

 

[Outlawmws]

We need god closeup pics of the ratchet, extensions, and a sample of the sockets for all markings.

There will likely be a letter inside a circle, and than can narrow both date range and the actual manufacturer that made them for Sears.

Off the top of my head I'd say thirties, but we do need those markings and the style of the "Craftsman" logo.