Original issue, US Army Technical Manual, 63 pages, size is 8 1/4" x 10 3/4", stapled, three holes punched, dated 4 October 1976.  This is not a commercial copy or print but an original issue government print published in 1976 and republished in 1981 to include change 1.  This publication is titled - TM 3-1040-219-12, Operator and Organizational Maintenance for Service Unit ,Flame Thrower, Truck Mounted: M4A2; Model M6-D (Davey Compressor) and Model M6-IR (Ingersoll-Rand Compressor).  Publication is designed to provide information and instructions for the operator and unit repair and maintenance requirements and procedures for this flame thrower service unit.  Very well illustrated using photographs and detailed line drawings.