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Bletchley Park 18-7-25 142 Naval Enigma M2 - serial no. M1322

Naval Enigma M2 - serial no. M1322

Before developing their enhanced four-rotor machine, the German Navy used three-rotor Enigma machines including this one. Three different models were designed: M1, M2 and M3. Approximately 600-800 of each type were manufactured.

This M2 was made in 1938, and still contains three of the original rotors that were issued with this machine. Unlike army/air force Enigmas, the rotors have letters (A-Z) rather than numbers (1-26).

The plug socket on this machine allowed the operators the option to connect it to a ships power supply instead of using the internal battery,

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Uploaded on July 22, 2025
Taken on July 16, 2025