@RTM - a good one for your Offset Screwdrivers thread. You should x-link it. The simple, crude, twisted ends at 45* offsets on square stock is an uncommon approach. Off the top of my head, only Duro and Indestro come to mind. Theirs was a little fancier in the sense of finishing the blades with side bevels like flat head screwdriver tips. I am guessing there were probably up to at least four (4) maybe five (5) in a set, all made from various size stock, probably 3/16" to 3/8".
I have never seen one in the wild. Interesting branding and marketing. The formal name of the company was Walker Manufacturing. I was able to pull that out of the snippets with some creative searching. The ads (on the left) that imply he was into metallurgy, professionally, at least as early as 1921 (1946 minus "over a quarter century"), are interesting.
It could be a coincidence, but there was a "Pop" Walker doing advanced motorcycle maintenance instruction at Holabird Ordnance Depot in Maryland during WWII. He obviously "knew" his tools. (Holabird is the same place where jeeps were tested in 1940 and, later, where all driver-maintainers were trained.)
The only reason I am not prepared to give it more credence is that history doesn't jibe with the steelworker history. Finding out if "Pop" Walker the offset screwdriver maker's given name was Marion E. would be interesting.