TypexMany authors claim that the German codebreakers had a look at the British Typex cipher machine and then gave up because they considered the task hopeless. Apparently that was not true for the German army’s codebrealers:
Referat 12Referat 12 (Agents section) of the German Army’s signal intelligence agency OKH-Inspectorate 7/VI dealt with the codes and ciphers of enemy agents. During the war they solved the cryptosystems of British, French, Belgian, Polish, Czech, Russian, Greek, Bulgarian and Norwegian spies and saboteurs. A summary of their work during the period May 1942- February 44 (last available reports) is in order.