This is a traditional Siberian hand-forged Yakut /Evenki knife.
BLADE: 2 3/4" long Forged SAE52100 high carbon steel (Wheel bearing). Thickness 5 mm.
Handle: 4" long Birch Burl Wood
The sheath is crafted from genuine leather with Bear Claws (similar to pic)
The Evenki knife's unique concave/convex geometry sets it apart from every other knife. http://av-salnikov.livejournal.com/2995.html