How many movies have Harry Bannink and Jaap van de Merwe collaborated on?

They have worked on 1 movie together! Their first movie together was Wim Sonneveld with Willem Nijholt and Corrie van Gorp (1973) and was their highest rated movie together. They have not worked together since Wim Sonneveld with Willem Nijholt and Corrie van Gorp (1973).