"French type "K" and "V" showing propellers for radio generators. Photo taken January 26, 1918 by W. C. D. Lab notes indicate approval on the same date. The image depicts propellers used in the production of radio generators."

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Size: 7979px × 6297px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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