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Johann Ludwig Kluber, "Kryptographik Lehrbuch Der Geheimschreibekunst" 1809 | by Ryan Somma
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Johann Ludwig Kluber, "Kryptographik Lehrbuch Der Geheimschreibekunst" 1809

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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Taken on January 1, 1980