Ordnance provision system. Ordnance catalog (ordnance provision system): Group F. Setter, fuze, hand, M1912 (for 75 mm guns, M1897, M1916, and M1917), setter, fuze, hand, M1912A1 (for 2.95″ mountain gun), setter, fuze, hand, M1912A4 (for 75 mm pack howitzer. M1A1), setter, fuze, hand, M1912A5 (for 105 mm howitzer, M2), parts and equipment; May 15, 1941.