This is a very nice example of a gas mask used by the US military starting in the 1941 and until 1949. This is a model M2. The top of the mask is stamped US; U. This stands for United States and universal size. The mask is a molded rubber. This example appears to be new old stock but does obviously show some signs of age. The rubber hose is present. At the end of the hose is where a filter canister would be attached. This mask was an improvement over previous models, but with the canister was still heavy at 5 pounds. These would be replaced in 1950 by the M3.
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