How many movies have Friedrich Kayssler and Theodor Loos acted in together?

They have worked on 8 movies together! Their first movie together was The Flute Concert of Sans-souci (1930) while their highest rated movie together was The Girl from the Marsh Croft (1935). They have not worked together since The Girl from the Marsh Croft (1935). They are most known for their drama films together.