End view of the Regulating Air Fan of the aeroplane radio apparatus, located in Washington, This photograph was taken on April 17, 1919. The apparatus is marked for official use only and carries the designation SUBJECT 47369. Photographer's credit: McKenzie.

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Size: 8573px × 5711px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., .., 4-17-19, 4-21-19, 47369, 471369, activities, aeroplane, air, american, apparatus, cap, description, fan, issued, mckenzie, military, notes, official, photographersot, photographs, radio, recd, regulating, removed, subject, sumber, view, war, washington, , world