Confederate cipher reel
This is one of just two such devices known to have survived the Civil War and it bears penciled notations of the names of Confederate officers and soldiers.
Click here to read the related story on the National Cryptologic Museum, and click here to check out the entire Road Trip 2010 package.
August 6, 2010 4:00 AM PDT
Photo by: Daniel Terdiman/CNET
| Caption by: Daniel Terdiman
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