You're welcome, danasan!
And they're all original recordings. Also, they correct something that nags me every time I watch Das Boot: At some point, they're listening to a song called "Sing, Nachtigall Sing", which is a beautiful song. Only one problem, the version they're listening to is with Evelyn Künneke and it wasn't released on record until 1943. There
was a version available in 1941, but that one was by Margot Friedlaender. They're both in the collection.
Yeah, I know. I need to take a break