Original British WWI Mills Bomb No. 5 MKI Grenade Dated April, 1916 Japanese Flare Guns was developed by the Spandau

was developed by the Spandau arsenal as a rigidly mounted aircraft machine gun and went into production in 1915

Finally some action

First and second war patrolsOn 19 December

The Helmet also has a hand written paper label to the interior that reads:

Original British WWI Mills Bomb No. 5 MKI Grenade Dated April, 1916 Japanese Flare Guns was developed by the SpandauOriginal Item: Only One Available. This is an very nice BATF approved totally inert example of a No. 5 MkI "Mills Bomb" Grenade. This is the first version of the "Mills Bomb" produced, and was one of the standard grenades used by British forces during WWI. This wonderful example is complete with internal parts including the spring loaded ignition (no explosives!) and the original pull pin. It is totally inert, and cannot be converted to an explosive