Set of four USM1 helmet shells with fixed bridges and front snap fastener. Chinstraps are missing. Two shells have been repainted while the other two are oxidised. The lot also includes a Westinghouse high-pressure composite liner, the interior of which is missing. The khaki paint is preserved at fifteen per cent. There is some wear and patina to the pieces with missing parts and traces of oxidation. condition II+. Set of four USM1 helmet shells with fixed bales and front seam. The chinstraps are missing. Two shells have been repainted while the other two show signs of oxidation. The lot also includes a highpressure composite liner manufactured by Westinghouse, though the interior is missing. About fifteen percent of the khaki paint is preserved. The pieces show some wear and patina, along with losses and traces of oxidation. Condition is II+.