Early military Enigma machine
The secret Enigma codebreaking work carried out at Bletchley Park during the Second World War became public knowledge in the 1970s, following publication of some of the details. Interest in the story grew rapidly.
In the late 1970s the Science Museum began to negotiate with the Government Communications Headquarters (GCHQ), the successor to Bletchley Park, on acquiring an Enigma machine for public display. This German military machine was donated to the Museum in 1980.
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