This wrench appears to be a very early example of Barcalo. It has a depressed panel with Barcalo Buffalo U-S-A- on the shank. On the reverse, the depressed panel in the center of the shank has Drop-Forged- and the sizes are forged into smaller depressed panels on their respective ends. Note the sizes are marked with no dashes or slashes and the forging is very rough.
This wrench has the size stamped into their respective sides of the shank, and Barcalo-Buffalo-USA stamped into the center of the shank. It also has a large forged C at the larger opening side of the shank.