A highly popular offering back in the day with a well recognized pattern. I had one with a hardwood handle which had been marketed as the Auto-Messer, sort of a survival pattern to be used to break windows in the event of a car accident. The blade was stout and probably close to bullet proof. It was sold off during one of my moves to newer territory and I now sort of wish that I had kept the thing.
The other WH in my collection made it to the hands of a friend who eventually managed to buy the knife after some begging. It was much older than your piece and had a well worn stag handle. Again, some regrets for parting with the old beauty. I do have a few older PUMA knives which I have decided to keep...at least for now. One thing I always liked was the small dot on the blades where they had done the Rockwell testing. If the truth be known and spread out on the coffee table, I'd say these knives were VERY hard as evidenced by the fact that they seemed difficult to field sharpen. Of course, the old PUMA blades are classic and still beloved. Many are probably safe queens that never see the light of day. I hope you keep yours close at hand.