This one stumps me. Has what is usually a late 20s tag. Size 16 x 8-1/2 x 3. Socket slot, what the heck fits into it. the only thing I can find are some of the stubby deep wells from 30-31. they are 2-3/4 to 2-1/2 in height. where the normal deeps from that era are about 3-1/4. I got this box with no tools, its not shown in any cats I have seen.
Any help would be good, I am looking for some of the 30-31 semi deeps, so holler at me if you have any.