It is apparently a Puma Hunter's Friend. What is the number on the guard? (if still keeps it). Seems to be a happy knife, used for the task it was designed. It is a nice knife, but without collectible value by the lack of blade inscriptions and the obvious use.
The handle is stag horn, the guard and the rivet collars are bronze, the pins within the rivet collars are nickel-silver (a kind of pewter).
Be welcome.