Original issue, US Army Technical Manual, 19 pages, size is 8 1/4" x 10 3/4", stapled, three holes punched, dated 22 November 1977.  This is not a commercial copy or print but an original issue government print issued in 1977 and republished in 1980.  This publication is titled - TM 11-5855-203-23, Organizational and DS Maintenance for Night Vision  Sights, Individual Served Weapon, AN/PVS-2, AN/PVS-2A  and AN/PVS-2B.  Publication is designed to provide information and instructions for unit maintenance requirments and procedures for these Night Vision Sights..  Very will illustrated using detailed and clear line drawings.