The DOE wrenches in pictures 5 thru 7 are 1940's or older, all alloy steel with a natural steel finish. A few of them look like 20's Check-Nut wrenches.
What is the size of the Vlchek engineers' wrench in picture 6? The one with the "42" forged-in die number? How is the face on the other end (in shadow) and the faces on the flip side marked? Also, what are the markings on the 2 wrenches upright in your little holders?