A 4-rotor, 1944 German Enigma machine. Bonhams. Equipped with a standard qwertz keyboard, these machines represented an exceptionally larger combination of codes than possible in a 3-rotor model.

The M4 Enigma machine, circa 1943 and made for German U-boat use, ... the M4 unit made in Berlin by Heimsoeth and Rinke is a German Naval 4-rotor Enigma enciphering machine.

An extremely rare German four-rotor M4 Enigma cipher machine used by the German U-boat forces in the Second World War has set a new world auction record at a Christie's sale at Rockefeller Center ...

Now a rare three-rotor Enigma has sold for $232,015 in a Sotheby's auction. ... which tells the story of mathematician Alan Turing's involvement in breaking the machine's code.

If you have ever dreamt of owning a World War II Enigma Machine, a three-rotor cipher machine will be auctioned by Boston-based RR Auction. The machine was originally made for the German military ...

WHAT: The international community of scientific machine collectors went all agog last December when Bonhams New York realized $463,500 for an intact M4 World War II Enigma machine. The result was ...