I had one, also. The steel was very, very hard. You could not sharpen it very easily. I got mine in the 80's. I was scared to carry my Game Warden on a Hunting trip because my knives kept disappearing on a trip.
I ended up using a Buck folder the same size, sold the Puma and bought 5 of the Bucks. Hunting partners kept putting my Bucks in their pocket when they went out and cut off a coyote's tail for proof of kill.
I also think that the model Game Warden that I had, had two blades...memory maybe skewed on this...but I don't think so.