Unidentified Steel Grip Tempered Steel USA Screwdriver - Unusual Grip Design

I found this old steel-grip screwdriver and have not been able to identify the manufacturer (or any other info). The only marking is on the shaft "TEMPERED STEEL - USA". It has a very unusual grip design with a couple of (what appears to be) decorative layers of unknown media (epoxy, maybe?). Of course, it's extremely sturdy and has marks consistent with hammer blows on the end (although it did not mushroom the steel. Any info would be greatly appreciated!