How many movies have Hans Ohrtmann and Willi Herrmann collaborated on?

They have worked on 9 movies together! Their first movie together was Die sieben Kleider der Katrin (1954) while their highest rated movie together was Der Fremdenführer von Lissabon (1956). They have not worked together since Gruß und Kuss vom Tegernsee (1957). They are most known for their romance films together.