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MSA All-Vision Diaphragm ChemOx Rebreather Mask

The MSA All-Vision Gas Mask was made for a variety of applications, including law enforcement and industrial use.  This MSA Diaphragm Gas Mask, had two cheek exhale valves, a central speech diaphragm, and was used with a ChemOx rebreather system.  This example was made by Mine Safety Appliances in the 1958.

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