1985 4.2 Inch Mortar M30 Operator's Manual. Technical Manual by Headquarters Department of the Army March 1985. Operator's Manual Approved for Public Release. Contains Operation, Maintenance, Ammunition and More. Some Illustrations. Manual #TM 9-1015-215-10. Nice May Have Been Used Condition. Cover is nice with minimal used wear. Pages are nice. Measures approx. 5.75" x 4". Comes as seen in the pictures.