Small Box Respirator Corrected English Model c.1917

U.S. Army M1A2 Service Gas Mask 1937

U.S. Army M1A2 Service Gas Mask 1937

U.S. Army M2A1 Service Gas Mask 1940

U.S. Army MI-I-5 Optical Gas Mask 1940

U.S. Army MI-I-5 Optical Gas Mask 1941

U.S. Army MIAI Training Gas Mask 1941

U.S. Army M2A1 Training Gas Mask 1941

U.S. Army M3 Diaphragm Gas Mask 1941