Interior of the first French mask produced in the United States during World War One. The mask features the initial design of a breathing valve. Photographed on April 2nd, 1919, by Reed of the Chemical Warfare Service. This image corresponds to the number 54609 in the series and carries the designation "AU Issued."

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Size: 8433px × 5771px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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