"This particular copy and style of blade supplied to Hudson's Bay Company by Sorby & Co. and by Jukes Coulson & Co. of Sheffield, England, was greatly favored by the tribes of the Northern High Plains, which are adjacent to the Rocky Mountains. An original knife of this type is indeed rare. It seems to have been highly prized by the Blackfeet, Piegans, Bloods, Assiniboins, etc., and was probably most used during the era of the fur trade and buffalo hide days. Its handle was a bear jaw or slab antler, the former being exceptionally rare. The slab antler handle usually had a copper sheet between the slab and the tang and was secured by copper rivets. The sheath was soft smoke-tanned moose or elk leather, entirely enclosed the knife, and was worn either around the neck or tied to the belt by leather thongs."
This Blackfoot Dag is at least 20 years old. The knife was never used and the sheath has some minor wear.