Here's another article summarizing the German breaks of M-209: http://www.jfbouch.fr/crypto/m209/german_break.html http://www.jfbouch.fr/crypto/m209/german_brea

Here's another article summarizing the German breaks of M-209: http://www.jfbouch.fr/crypto/m209/german_break.html http://www.jfbouch.fr/crypto/m209/german_break.html It mentions in passing that details of the breaks were sent over Enigma which the allies were breaking, so they knew that the Germans were breaking M-209.