How many movies have Jef Simons and Mendel de Boer collaborated on?

They have worked on 1 movie together! Their first movie together was De Dans der Vierkanten waarin opgenomen Elly, of het Beroemde Stuk (1980) and was their highest rated movie together. They have not worked together since De Dans der Vierkanten waarin opgenomen Elly, of het Beroemde Stuk (1980).