REVOLVING DRUM CIPHER - 1920s
 Does anyone have any more information on this device? If so, contact Jerry.proc@sympatico.ca
revolving_drum_cipher_03a.jpg
The protoype was built by A.G. Damm in the 1920s. An NCM exhibit.  (Photo by Ralph Simpson)


Contributors and Credits:

1) Ralph Simpson <ralphenator(at)gmail.com>

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Apr 20/12