The M4 machine is one of the most sophisticated of its type and was developed for expend on U-boats after the Germans feared that their codes had been brokenAn extremely rare and fully operational Nazi Enigma machine has sold for $365000 in New York,setting a new record at auction.
The M4 machine, which was built between 1943 and 1945, and is one of around 150 to bear survived from an estimated 1500 that were built as Nazi Germany fought to fend off the Allies.
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Source: theguardian.com