OK!! IT WORKS! Thanks! But one question: I get this message and if i follow the decrypt instruction will that this is "Potsdam". But how it can be if this is 1.9.39. and potsdam just since june 1941? Maybe i got some mistakes?

https://imgur.com/a/KHtcL IMAGE
UPD: I Just mixed up quelle with strom! Thanks for help!