Original (not reproduction) US Army Vietnam War period M1 helmet with liner, The liner is a pre 1963 one with liner chinstrap lugs. The liner has a Firestone mold-in stamp which indicates 1962 for the mold refurbishment so the liner would appear to have been made around that time. Headband markings are no longer clear. The helmet has heat stamp number that appears to be, but not certain, M564 which may indicate the manufacturer McCord from 1951 to 1958. Complete with original Mitchell pattern camo cover with Contract DSA - 1 - 7005 indicating late1964 or early 1965 production. Original period elastic band is attached. Very good used condition.