A very good example of a genuine U.S. Vietnam War era M1 helmet. This M1 steel pot was manufactured by 'Parish Division of the Dana Corporation' who made M1 helmets for the U.S. Army between 1968-1970 and has a heat stamp number of: 7620, has Parish 'P' markings to the chin strap metalwork. The genuine U.S. P64 liner was made by Marmac with (Defense Supply Agency) contract markings to the suspension webbing and is dated October 1972, the genuine U.S. headband/sweatband has DSA contract markings and is dated 1974 and has a genuine U.S. nape strap. The genuine Mitchell cover is DSA contract ink marked and is dated 1970, around the outside of the cover is a genuine U.S. post-Vietnam elastic band. A very nice complete helmet.