. "Caliber 9"@en . . . . . . . "Caliber 9 (Italian: Milano calibro 9) is a poliziottesco film written and directed by the Italian crime film specialist Fernando Di Leo in 1972. The film is based on a novel of the same name written by Giorgio Scerbanenco.The soundtrack for the film, Preludio Tema Variazioni e Canzona, is a collaboration album between Luis Enr\u00EDquez Bacalov and the Italian progressive rock group Osanna.Milano calibro 9 is the first part in Di Leo's Milieu Trilogy."@en . .