This is an original early-WWII St. Clair manufactured low pressure M1 helmet liner. It features non-painted steel A-washers and a transitional khaki suspension. These early features date the liner's production from late-1942 to early-1943. The interior comes complete with its original Johnson & Johnson manufactured neckband and a recently installed original size 7 1/8 rayon headband. The exterior retains its original smooth flat olive drab factory paint finish, with remnants of a set of original sergeant's stripes at both the front and rear of the liner.