I have a question though; I see in most of your 1/4'' set, the sockets are a mix of 12 points, 8 points and 6 points? is that the way it was "back in the days"?
Here's a summary chart I created for a different site, focused on WWII specs and sets, that you might find helpful.
You can ignore columns 3, 4, & 5, which are esoteric to that subject area.
The other columns will give you an idea of what sockets were being offered by some of the major socket drive mfgrs (by model number) before, during, and after the war, with respect to service openings (column 1) and the number of points (column 2).
I will highlight a few things.
- For square drain plugs and square fasteners (as Stuart and Otg alluded to...), typical sizes were 1/4", 5/16", and 3/8", although you will find some oddballs out there, too.
- For hex fasteners, the Army was using a mix of 6- and 12-point sockets early in WWII. In 1945, they wanted all 6-point sockets. They may have taken their cues from Plomb and Walden-Worcester, who both seemed to have a strong belief in hex sockets for all sizes. Most other mfgrs were offering a mix of 6- and 12-point.
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