Operational rotors

These are the operational rotors of Enigma. "The German military issued extra rotors with each machine--two for Army and Air Force machines and four for Navy. Each rotor was wired differently and identified with a Roman numeral. Setting up a communications net involved selecting the rotors for the day and placing them in the machine in the proper left-to-right order."

Click here to read the related story on the National Cryptologic Museum, and click here to check out the entire Road Trip 2010 package.