Attached is mechanical drawing depicting one of the common ignition grenades that were used by British and Commonwealth forces during World War One. The Ball grenade was essentially a cast-iron sphere that measured three inches in diameter and it was one of a number of British grenades that used the Brock lighter.
WWi British GrenadesWW1 GrenadeBrock Lighter used in British Army Ball Grenade 1916WW 1 GrenadeWW 1 British Ball GrenadeWW1 Ignition GrenadeCommon British Grenade circa 1915Grenade History WW1British Empire Army Grenade 1914 - 1918
WWi British GrenadesWW1 GrenadeBrock Lighter used in British Army Ball Grenade 1916WW 1 GrenadeWW 1 British Ball GrenadeWW1 Ignition GrenadeCommon British Grenade circa 1915Grenade History WW1British Empire Army Grenade 1914 - 1918