for these four pieces
1-truth hd 3/4 inch  9 inch maybe another machinist wrench
2- extension with 1/2 inch hex in both ends no name or numbers
3- billings no.723  90 degree with a 1/2 inch male hex on one end 1/2 inch female on the other
4-38 drive 1/2 12 point  with no.8t-1273-2 and e-at87-41  could be military wrench no name

The first to the left looks like a "striking" wrench. I could be wrong thoe cause there usually a tad shorter and a little thicker.

No.1 looks like user modified, or as you said a machinist wrench.  no.2 could be a lug nut extension wrench for early dual wheels.  no.3 I've seen often, an obstruction wrench for automobile work.   Those are my guesses for the day