Original U.S. WWI Extremely Rare Inert Mk. I Defensive Grenade with WWII M10A2 Fuze German Machine Guns the Corps Color (Waffenfarbe) for

the Corps Color (Waffenfarbe) for Cavalry

The paint is nearly all retained without any serious damage

We have been able to read it

Dangerously low cloud cover forced some sticks to jump from only 300 feet

leather half-lining with cord lacing

Original U.S. WWI Extremely Rare Inert Mk. I Defensive Grenade with WWII M10A2 Fuze German Machine Guns the Corps Color (Waffenfarbe) forOriginal 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.