Hans Beimler, Kamerad
Starring Horst Schulze, Erik S. Klein, Kurt Müller-Reitzner, Gerd Michael Henneberg, Walter Jupé, Hannjo Hasse, Helmut Schreiber, Jürgen Frohriep, Wolfgang Greese, Wera Paintner
Watch "Hans Beimler, Kamerad" on Amazon released in 1969. It's a drama and history show, and has a rating of 8 out of 10 from Imdb which is usually fine for this kind of show.