Ordnance provision system. Ordnance catalog [(ordnance provision system)]; Group G, v. 1, Trailer, Athey, 6-ton, BT-898-1, trailer, Athey, 6-ton, BT-898-4, v. 2, Trailer, Athey, 20-ton, ET-1076-1, parts and equipment; Dec. 2, 1942.