Reply to post: As a foot (not boot) note....

WWII Bombe operator Ruth Bourne: I'd never heard of Enigma until long after the war

Joe Gurman

As a foot (not boot) note....

.... the 4-rotor bombe was built for the US Navy to handle messages encrypted the the four-rotor Enigma put into service by the German navy in 1942, in parallel with the British Mammoth. By the end of the war, 160 had been produced by the National Cash Register company in Dayton, Ohio. Most were located at the IS Navy Yard in Washington, DC.

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