The Cipher Machine 41, the successor of the Enigma machine, used by Nazi Germany's military to encrypt strategic messages during World War Two, is on display at the Deutsches Museum | Reuters

The Swiss NEMA cipher machine is an extraordinary piece of both military and mechanical engineering history.Known as the Neue Machine, or "New Machine", the NEMA was developed by Zellweger AG in Uster, Switzerland during World War II to replace the German-engineered "Enigma K" after the Swiss realized that both the Allies and the Germans were able to break the Swiss traffic. | M.S. Rau