US soldiers attend a training session at the School of Radio and Multiplex Telegraphy in College of the City of New York, December 1918. Multiplex sets are seen in operation in the photograph. The image is numbered 67421 and taken by photographer Sproul.

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Size: 8495px × 5774px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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