How many movies have Erich Pommer and Ressel Orla collaborated on?

They have worked on 3 movies together! Their first movie together was Half-Blood (1919) while their highest rated movie together was The Spiders: Part 2 - The Diamond Ship (1920). They have not worked together since The Spiders: Part 2 - The Diamond Ship (1920). They are most known for their crime films together.