How many movies have Arthur Mainzer and Ernst Behmer acted in together?

They have worked on 3 movies together! Their first movie together was Who Takes Love Seriously? (1931) while their highest rated movie together was Berlin-Alexanderplatz: The Story of Franz Biberkopf (1931). They have not worked together since The Thirteen Trunks of Mr. O.F. (1931). They are most known for their drama films together.