Original U.S. WWII Rare Mk. III A1 Offensive Grenade with M10A2 Fuze - 1943 Dated Japanese Navy but the shooter had merely

but the shooter had merely to pull the trigger in one smooth action to cock the piece

and is definitely not WWII vintage

The reverse ricasso shows the CROWN / AMBERG marking of Amberg Arsenal in Bavaria

just the expected denting and scratches from service

Original U.S. WWII Rare Mk. III A1 Offensive Grenade with M10A2 Fuze - 1943 Dated Japanese Navy but the shooter had merelyOriginal Item. Only One Available. This is an extremely scarce WWII Mk. III A1 Grenade, which saw heavy use during World War II. There are three variants of the Mk III: the basic MK3, the MK3A1, and the MK3A2. They differ in their construction and the type of fuze used. They were designated Mk III (Roman numbers) prior to 2 April 1945, making this example a WWII manufacture. Like all deactivated ordnance, this grenade is Not Available for Export. The