The National Cryptologic Museum acquired this cipher device from a West Virginia antique dealer who found it in a home near Monticello. It was used to encipher the French alphabet. 

A description for a simplified version of the device to be used for the English language has been found in Jefferson's papers and has become known as the Jefferson Cipher Wheel. Although Jefferson may have used it while ambassador to France, a direct connection to Jefferson of the device on exhibit remains unproven.

Various views of the 18th century device.

All photos in this table bty Ralph Simpson

Contributors and Credits:

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

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Apr 21/12