Original U.S. WWI Extremely Rare Inert Mk. I Defensive Grenade with Original Fuse and Lever Category_Martini-Henry Rifles This excellent example is marked

This excellent example is marked on the top of the receiver with the Japanese Characters 十 一 年 式 (Juu-Ichi Nen Shiki) written vertically

Meaning a 1/3 length section of the display receiver is solid steel

but both have relatively clear matching National Business Numbers (RBNr

Condition is amazing for its age

a face-off between the Wolfhounds and the Japanese military

Original U.S. WWI Extremely Rare Inert Mk. I Defensive Grenade with Original Fuse and Lever Category_Martini-Henry Rifles This excellent example is markedOriginal Item. Only One Available. The Mk 1 grenade (sometimes spelled Mk I) is a fragmentation hand grenade used by American forces during World War I. According to its designers, it was to be the "simplest", yet most "fool proof", grenade ever made. However, some major problems appeared when the grenade was used in the field. It was retired from service before the war ended, replaced in 1918 with the improved Mk 2 grenade used through World War II.