Photograph of an aviator's oxygen apparatus from the Signal Corps, taken on December 18, 1918. The image shows a manifold connector for oxygen cylinders used to connect two cylinders to high pressure tubing. It is connected to an aviator's control box, which is carried in the plane. This image has restricted usage, not for publication and only for official use.

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Size: 8341px × 5620px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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