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Typex Mk III cypher machine for field use, c. 1945

Typex Mk III cypher machine for field use, c. 1945

1945
Four-rotor Enigma cypher machine, 1939-45.

Four-rotor Enigma cypher machine, 1939-45.

1939-1945
Typex Mk III Exp ciphering machine, complete in fibre transit case, c. 1945. Electrical impulses were transmitted through 5 drums or wheels, arranged in a pre-determined order. A message was typed with the left hand whilst turning the handle with the right, achieving 20 words a minute. Cypher, or plain text, was printed onto paper tape, to be transcribed into a communication system.

Typex Mk III Exp ciphering machine in case

c. 1945