An excellent example of a genuine complete Vietnam War era U.S. M1 helmet. This M1 steel pot was manufactured by Ingersoll who made helmets from 1965 to 1968 for the U.S. during the Vietnam War, and has an early heat stamp number of: 1 0256, with original chin strap that has anchor markings to the metalwork, helmet was repainted at some point and still retains numbers underneath on the front and back '75' and both sides '3', the original apple green paint can be seen underneath on a few scuff marks, reference to 75 & 3 could be the 3rd Ranger Battalion 75th Infantry Regiment (Ranger) who were active in Vietnam from 1969 to 1971. The P64 liner is in excellent shape and was made by Marmac, faint contract markings to the suspension webbing and would have been made in the 1960's. The genuine U.S. headband/sweatband has ink DSA contract markings and was made in 1969. The nape strap is genuine U.S. with faded contract details, early variant made in the 1960's. The genuine U.S. Mitchell cover is early contract marked 9085 and was made in mid 1965, around the outside of the cover is a genuine U.S. Vietnam War elastic helmet band with ink markings to front. A very nice complete helmet with interesting number markings to the M1 steel helmet.