Hinsdale made Bob Cat wrenches and sockets, but AA has nothing about Super-Bob-Cat tools. They look exactly like a Hinsdale X20 (1/2 x 9/16) and X30 (5/8 x 11/16). So I'm guessing these are later models from the 40's or 50's??? Or were the Super-Bob-Cat line of tools the low end models available at the same time as the X20 and X30? I only mention "low end model" as the stamping for sizes and Chrome Vanadium Steel is deep and crisp, but the Super-Bob-Cat is barely stamped in and off center overlapping on the size stamp. Perhaps a later stamping of a finished tool, clean out the warehouse and dump old inventory kind of thing?