This is an original early-WWII U.S. Hood Rubber Co. manufactured low pressure M1 helmet liner. Hood Rubber was the second least common producer during the war (behind General Fibre), with just 206,000 liners manufactured (Oosterman, 200). The A-washers are non-painted steel, dating the liner's production from late-1942 to mid-1943. The interior crown features the iconic disk pattern, but its silver painted HR has worn away. The liner's khaki suspension is frayed near one of the A-washers, but remains intact. It comes complete with an original Lapeer Fabricators, Inc. headband and neckband. Like the liner, itself, both accessories date from 1942 to 1943. Interestingly, scratched into the exterior's original field repaint is a small star.