How many movies have Agustín Navarro and Carmen Martínez Sierra collaborated on?

They have worked on 3 movies together! Their first movie together was El cerro de los locos (1960) while their highest rated movie together was Enseñar a un sinvergüenza (1970). They have not worked together since La casa de los Martínez (1971). They are most known for their comedy films together.