Sgt. Gray is seen in this photo, taken on March 11, 1919. The image shows radio receiving sets with a range of 6000 to 18000 meters. This is an interior view of the equipment. It is marked as "issued for official use only" and "not for publication."

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

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