How many movies have Eduard Kessel and Willi Herrmann collaborated on?

They have worked on 3 movies together! Their first movie together was Solange noch die Rosen blüh'n (1956) while their highest rated movie together was Der Fremdenführer von Lissabon (1956). They have not worked together since Der Adler vom Velsatal (1957). They are most known for their romance films together.