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ok, here is all the filter info on WWI ,american masks, from ,GAS MASKS, Collectors Guide for Identifying Common ,American, Military ,Gas Masks, by Ron Ruble "Canister: The 'Corrected English ,Mask,' and the 'Richardson-Flory-Kops ,Mask,' canisters look the same except for color and he 'Training ,Gas Mask,' canister is larger.
The M2 ,gas mask, was a French-made ,gas mask, used by French, British and ,American, forces from April 1916 to August 1918 during World War I. The M2 was fabricated in large quantities, with about 29,300,000 being made during the war. It was intended to protect the wearer from at least five hours' exposure to phosgene ,gas,, a common chemical weapon of the time.
WW1 Gas Mask, Indiana War Memorial museum exhibit . This is a modified version of the British design, a canvas ,mask, attached to a fiber hose with a charcoal filter attached. The charcoal was make from fruit pits and nut shells, both of which were often acquired from recruiting drives from the home front.
Buy Face ,Mask, and get the best deals at the lowest prices on ,eBay,! Great Savings & Free Delivery / Collection on many items. Skip to main content. Shop ... Washable Reusable Cotton ,Fabric, Face ,Mask, with Respirator & 2 x PM 2.5 Filters. £2.39 to £7.99. Free postage. Click & Collect.