Original visual training aid chart from a 1969 U.S. Military Visual Training Aid on the M-60 General Purpose Machine Gun - one of the primary weapons used by U.S. forces during the Vietnam War. Chart is double-sided, black and white graphic illustration on one side and color rendering on the reverse (shown in photos above). Charts are printed on heavy paper stock and measure 33"h x 42"w. Charts are in good overall condition with moderate wear from usage and storage.