How many movies have Harald Heide-Steen Jr. and Tom Matsen collaborated on?

They have worked on 9 movies together! Their first movie together was The Olsen Gang Takes the Gold (1972) while their highest rated movie together was The Olsen Gang and Dynamite-Harry Goes Wild (1973). They have not worked together since The Olsen Gang's Last Trick (1999). They are most known for their crime films together.