Photograph 9136 from May 2, 1918, depicts a radio apparatus for airplane use at the Radio Development Station in Washington, The equipment includes a field switch, type S-3, and a distributing block, type BL-1. This image is not meant for publication. Additional notes mention a signal corps and a termal block from Westhouse, Pittsburgh, PA.

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Size: 9177px × 6297px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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