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SIGABA M-134-C (Army) CSP-888 (Navy)

Known to German cryptanalysts during World War II as the "American Big Machine".

 

Taken at the National Cryptologic Museum, NSA.

 

Creative Commons photo courtesy of ideonexus, please feel free to use for your own purposes.

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Uploaded on November 14, 2010
Taken on January 1, 1980