Cpl. Polk with a Number B radio set, specifically a Type B-10 airplane wave meter, in Paris, France. This photograph was taken on March 28, 1918. The image is part of the 111-SC-33907 series and was received by the photographer on January 7, 1919. It is marked "M Held, not for publication."

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Size: 8411px × 5734px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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