MSA All-Vision Diaphragm Riot Gas Mask
The MSA All-Vision Gas Mask was made for a variety of applications, including law enforcement and industrial use. This Smith & Wesson/MSA Diaphragm Riot Gas Mask, had two cheek exhale valves, a central speech diaphragm, and Chin Type Cannister No. 67 to protect against CN, CS, and DM tear gas. This example was made by Mine Safety Appliances in 1957.
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