How many movies have Giuliano Carnimeo and Sebastiano Celeste collaborated on?

They have worked on 8 movies together! Their first movie together was Once Upon a Time in the West There Was a Man Called Invincible (1973) while their highest rated movie together was The Diamond Peddlers (1976). They have not worked together since My Wife Goes Back to School (1981). They are most known for their comedy films together.