How many movies have Aldo U. Passalacqua and Francesco Vetrano collaborated on?

They have worked on 4 movies together! Their first movie together was The Perfume of the Lady in Black (1974) while their highest rated movie together was Fantozzi: White Collar Blues (1975). They have not worked together since Fantozzi: White Collar Blues (1975). They are most known for their comedy films together.