A Monocord switchboard unit at the Central Officers' Training School for in Camp Taylor, Louisville, KY. This photograph was taken by the Signal Corps on Nov. 26, 1918 and is not approved for publication. It is intended for official use only.

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Size: 8425px × 5703px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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