Ordnance provision system.: Group F, Clinometer, Mk. 1 (degrees), 3″ trench mortar, Mk. 1 and Mk. 1A2, clinometer, Mk. 2 (mils), 3″ trench mortar, Mk. 1 and Mk. 1A2, parts and equipment; Aug. 22, 1941.

Tools