Original U.S. WWII M21 Inert Practice Pineapple Fragmentation Training Hand Grenade with Early Cutback M10 Fuze and Original Correct Husk - Dated 1939 Japanese Uniforms The blade itself was not

The blade itself was not made from an already existing knife and was more than likely made from a piece of scrap steel

and retains the markings:

Still retains the original data label and is a size 42

the 452d supported ground forces and carried out interdictory operations

Original U.S. WWII M21 Inert Practice Pineapple Fragmentation Training Hand Grenade with Early Cutback M10 Fuze and Original Correct Husk - Dated 1939 Japanese Uniforms The blade itself was notOriginal Item: Only One Available. Totally inert according to BATF guidelines with a hollow body and inert fuse. This is a great example of the M21 Practice Training grenade, an inert version of the iconic U. S. fragmentation pineapple grenade issued during WWII. The Mk II was standardized in 1920 replacing the Mk I of 1917. It was phased out gradually, the U. S. Navy being the last users, and on 2 April 1945 the Mk II and Mk IIA1 were re designated