Side view of the S. C. aeroplane radio apparatus in Washington, The cap has been removed, revealing the regulating air fan. This photograph was taken by Sergeant McKenzie on April 21, 1919 and is registered as Subject 47370. The apparatus is for official use only.

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Size: 8573px × 5711px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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