Image: Purple machine deciphering circuit.agr
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Description: Contemporary schematic diagram of the machine built by the U.S. Army Signal Intelligence Service to decrypt the Purple cipher.
Title: Purple machine deciphering circuit.agr
Credit: Own work
Author: US Army SIS (Imaged by ArnoldReinhold)
Permission: The underling diagram is a work of the United States Army, circa World War II.
Usage Terms: Creative Commons Zero, Public Domain Dedication
License: CC0
License Link: http://creativecommons.org/publicdomain/zero/1.0/deed.en
Attribution Required?: No
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