No, that's not entirely correct. The version with more rotors (4) came during the war, not pre-war, and was only ever adapted by the German Navy. The rest conti

No, that's not entirely correct. The version with more rotors (4) came during the war, not pre-war, and was only ever adapted by the German Navy. The rest continued using the 3-wheel version. What the Germans did at the start was to increase the complexity (by how they wired it, etc), and the "only" problem the Poles had was that they had only 6 of their own Bombe, and they would need many more. They didn't have the resources to build them. Edit: To my utter surprise I found there was a real Enigma machine in a tiny volunteer-run military museum in my home town.