USM1 helmet. USM1 helmet shell. Front snap fastener. 70% paint and cork. Lot number 635. Fixed bridge. Chinstrap complete with original stitching. High pressure composite liner. Westinghouse manufacture. Full canvas headpiece. Brown leather sweatband. Leather chinstrap with no visible markings. Nape of armour complete, markings illegible. 70% paintwork. Some wear and patina. Condition II+. USM1 helmet. USM1 helmet shell with front seam rim, paint and cork preserved at 70 percent, lot number 635, fixed bales, complete original sewn chinstraps. High-pressure composite liner manufactured by Westinghouse with complete web suspension. Brown leather sweatband, leather chinstrap without visible markings. Complete nape strap with illegible markings. General wear and patina. Condition II+