How many movies have Erwin Fichtner and Friedrich Kühne acted in together?

They have worked on 7 movies together! Their first movie together was Das eiserne Kreuz (1914) while their highest rated movie together was The Hound of the Baskervilles (1914). They have not worked together since Der Hund von Baskerville - 5 Teil: Dr. Macdonalds Sanatorium (1920).