Original issue, US Army Technical Manual, 139 pages plus 3 fold out pages, size is 8" x 10 1/4", bound, three hole punched, dated 6 December 1963.  This is not a commercial copy or print but an original issue government print issued in 1963 and republished in 1981.  This publication is titled - TM 5-6115-318-15, Operator, Organizational,Field and Depot Maintenance for Generator Set, Diesel Engine, 100 KW, AC, 60 Cycle, 3 Phase, 4 Wire, 240/416 Volts, Portable Skid Mounted (Consolidated Diesel Model 4180). Publication is designed to provide information and instructions for the maintenance requirements and procedures for this 100 KW generator at all levels of maintenance.  Well illustrated using photographs and line drawings.