What i know about this Japanese Arisaka bayonet is that it was captured by an American during WWII and converted into a knife. Most probably done in a factory or a professional workshop.
If you have any questions, please do not hesitate to contact me. This item is in the category "Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Edged Weapons".mouse" and is located in this country: BG. This item can be shipped worldwide.