That one looks like a Utica (Kutmaster) model. Usually these were lightly etched, and the marking is long gone. Imperial, Utica, and Camillus, and their associated contract brands were big makers or re-sellers of this style. That being said, I figure most of the big eastern firms had a similar styled knife in their catalogs up until the last 50 years or so.
Very popular pattern.
The handles are bone.