Valved die casting and smoke box filter assembled with a mask. This photograph was taken by the Chemical Warfare Service's photographer on April 2, 1919. The image is labeled as NUMBER AU and it captures the assembly process of the valved die casting and smoke box filter, used as protective measures during World War One.

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Size: 8484px × 5809px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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