1. Ordnance provision system. Ordnance entnlog (ordnance provision system) Groups A-T. F-173. Telescope, observation, M48, telescope, observation, M49. organizational spare parts and equipment; May 27, 1943. Bookmark Corporate/Agency Authors: Ordnance Department, Army Service Forces, and War Department Publisher: Ordnance Department Date: [August 1943] SuDoc number: W 34.93:F-173/orgn./943