Cpl. Newberg from the Signal Corps is pictured in this photograph. The image captures him alongside improvised testing equipment at the Bureau of Standards in January 1919. The purpose of the equipment is to determine the most appropriate brush pressure for the Dynamotor Type 1. The photo is labeled for official use only.

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Size: 8695px × 5835px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

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