Himalayan utility knife

length: 6 3/4"
blade: 3 3/4"
blade width: 1/2"
grip: 3"
weight: 3 oz

Interesting little utility knife from the Himalaya region (Tibet or Nepal most likely). Thick single edged blade with a fuller on one side, black and white horn scales for the grip. Traditional curved scabbard is of wood, brass, nickel silver, and "same" (ray skin). Does anyone know why the scabbards were curved? The blade is straight. Early 1900's.