How many movies have Mario Maurano and Nicolás Proserpio collaborated on?

They have worked on 20 movies together! Their first movie together was Con las alas rotas (1938) while their highest rated movie together was Hay que educar a Niní (1940). They have not worked together since Veinticuatro horas en la vida de una mujer (1944). They are most known for their drama films together.