I think these were used in WWI and WWII and maybe later (not sure when Japan blade was installed, but I have seen others very similar). Auctiva offers Free Image Hosting and Editing.The item "M-1918 WWI Trench Knife Kiffe, Japan Stainless Steel Blade" is in sale since Wednesday, January 31, 2018. This item is in the category "Collectibles\Militaria\WW I (1914-18)\Original Period Items\United States\Edged Weapons".
The seller is "kdbmoon" and is located in Phoenix, Arizona. This item can be shipped to United States.