How many movies have Mattis Mathiesen and Per Lekang collaborated on?

They have worked on 4 movies together! Their first movie together was Operasjon Løvsprett (1962) while their highest rated movie together was The Olsen Gang meets The King and the Jackal (1974). They have not worked together since The Olsen Gang For Full Music (1976). They are most known for their comedy films together.