How many movies have Fausto Zuccoli and Maurizio Biasini collaborated on?

They have worked on 6 movies together! Their first movie together was I 2 pompieri (1968) while their highest rated movie together was Song That's Playing In My Head (Zum Zum Zum) (1969). They have not worked together since Due bianchi nell'Africa nera (1970). They are most known for their comedy films together.