Someone thought long and hard about this design. It's simple, fits any size nut within a certain range, has two main stamped parts, and is durable. The Schulz's liked it (S. 343).

With great engineering like this, this wrench must have been intended for a military application - something like screwing in bomb fuses. Given the Nebraska location of the Schulz's and the Delaware location where I found it, I think it's provenance could have been the U. S. Air Force.  What do you all think/know about this wrench?

I agree - the design is awesome!
What size ranges are the jaws? Seems like it could turn hex, square, and round (or worn) fasteners with ease. Maybe black iron pipe, too.

I dont know much about it but I sure do think its cool.

About how much does it weigh, just wondering?

A nice clean design.

Kinda reminds me of a basin wrench tho, without the right angle part...

The wrench, with the jaws just touching, is 9 1/2" long. It weighs 11.7 ozs..  I estimate the jaws could grip up to 2"  and down to 1/4".