interestingly there was a project to break unbroken 4 rotor navel enigma messages and they still have one unbroken one https://enigma.hoerenberg.com/index.php?

interestingly there was a project to break unbroken 4 rotor navel enigma messages and they still have one unbroken one https://enigma.hoerenberg.com/index.php?cat=Unbroken https://enigma.hoerenberg.com/index.php?cat=Unbroken