Original issue, US Army Technical Manual, 21 pages, size is 8 1/4" x 10 3/4", stapled, three hole punched, dated 12 March 1979.  This is not a commercial copy or print but an original manual published in 1979 and republished in 1983.  Title of publication is -  TM 3-6910-227-10, Operator's Manual for Training Set, Chemical Agent Identification: Simulants, M72A2.  Publication is designed for your use in operating and maintaining the Training Set, Chemical Aent, Identification,  Simulants M72A2.  Very well illustrated using extremely clear and detailed line drawings.