VIETNAM WAR US M1 HELMET & HEADGEAR LOT OF 5 Vietnam War era US Army M1 helmet & headgear, lot of 5. 1- Early M1 helmet, front seam, swivel bales, Capac liner with OD green webbing. 1- Cap insulating helmet liner dated 70. 1- ERDL camo jungle hat size 6.7/8, dated 68. 2- USMC / Army Insects head net.