Apparently this is fake. I haven't searched 'Verbatim 1' myself to check, but here's the epub: https://annas-archive.org/md5/49cb67582112e331a930074fc1344331
Discussion
So I don't speak German or whatever this is, so this could be fake too for all I know, but the 1981 version is the one specifically mentioned. Multiple people seem to suggest it's nearly impossible to confirm at this point though.