Sgt. Gray photograph taken on March 11, 1919, shows an exterior view of radio receiving sets with a range of 6000 to 18000 meters. The image was labeled 41849 and marked as not for publication but for official use only. The photographer for this image is listed as "Mar. 15, 1919."

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Size: 8525px × 5802px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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