Exterior switches of four tube amplifiers (German) at the Research and Inspection Lab in Paris, France. This image was taken on July 30, 1918, by Lieutenant Cloud and received on July 30, 1918. It is part of the Photographs of American Military Activities during World War I collection held by the Censor.

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Size: 8434px × 5695px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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