How many movies have Friedl Behn-Grund and Otto Matthies collaborated on?

They have worked on 4 movies together! Their first movie together was Das andere Ich (1941) while their highest rated movie together was Die seltsamen Abenteuer des Herrn Fridolin B. (1948). They have not worked together since The Blum Affair (1948). They are most known for their drama films together.