old antique monkey wrench lot, vintage pipe wrenches or railroad tools

Lot of four very old iron adjustable wrenches, 9" to 11" long end to end. All of these appear to in in fine working order, although they have old rust to the finish, as shown.

One of these is marked BHM - Bridgeport Connecticut, we didn't see any other maker's marks, though one wrench is marked Mfg. Under (something) Patented Steel. (This mark is very tiny!)