Metro-Goldwyn Mayer ; a film produced by Alberto Grimaldi ; scenario by Sergio Leone and Fulvio Morsella ; screenplay by Luciano Vincenzoni and Sergio Leone ; dialogue by Luciano Vincenzoni ; directed by Sergio Leone ; released through United Artists
United Artists presents a film produced by Alberto Grimaldi ; screenplay by Age [Agenore Incrocci], Scarpelli [Furio Scarpelli], Luciano Vincenzoni and Sergio Leone ; English version by Mickey Knox ; directed by Sergio Leone