"Soldiers working on a radio apparatus, specifically designed for airplane use. The device features a streamline casing and is identified as Type 08-1 with a spring contact MM-4. Photo taken at the Radio Development Station in Washington, Image not intended for publication. May 3, 1918."

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Size: 9177px × 6297px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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