How many movies have Rudolf Lenz and Theodor Ottawa collaborated on?

They have worked on 4 movies together! Their first movie together was Die Sennerin von St. Kathrein (1955) while their highest rated movie together was Heimweh nach dir, mein grünes Tal (1960). They have not worked together since Heimweh nach dir, mein grünes Tal (1960). They are most known for their drama films together.