David,
You won't see any catalog references for black oxide tools because of the chrome restrictions of that time. From the stickie at the top of this subforum:
WWII
Generally, tools made between 1942 to 1945 are not plated. Wartime finishes include natural steel, cadmium, phosphates, oxides, enamel, and japanning. Generally, wartime tools will also have no alloy markings (e.g., Nickel, Chromium, Molybdenum, Vanadium), although they lingered into 1942.
The takeaway is that the items in the socket sets would be the same, just the finish would be different.
Bill