An experimental type storage battery, with the symbol "Chief Signal Officer, ", seen in this photograph taken at Camp Polk, South Carolina. The description and date specify that it was taken on November 14, 1919. The battery is marked "For Official Use Only" and has the notes "18 C Notes 967376 O."

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

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