Ordnance provision system. Ordnance catalog (ordnance provision system): Group F. Instrument, observation. A. A., B. C, M1, telescope, elbow, M35, telescope, elbow, M2. major items, maintenance parts and equipment required for maintenance of instrument, observation. A. A., R. C, M1, telescope, elbow, M35, and telescope, elbow. M2, addendum; Dec. 15, 1942.