MII diaphragm gas mask | Gas Mask and Respirator Wiki | Fandom
1 Development 2 MII-VIII-IIIA1 diaphragm gas mask 3 MVIII Service Canister 4 MIIIA1 Service Carrier 5 Markings 6 Last uses and packaging of the masks In the late 1920s, the US was looking to improve and develop upon the MI diaphragm gas mask. The Army began experimenting with new types of diaphragm face pieces. One of the first was the E3R64. The suitability of this mask for use by the ...