Dirty Harry is a 1971 American crime thriller film directed by Don Siegel and starring Clint Eastwood as the eponymous Dirty Harry. The film follows a police detective who is tasked with tracking down a serial killer known as "Scorpio."
The movie poster likely features the Helvetica Black font, which is a sans-serif typeface created by Max Miedinger in 1957. More information about the typeface can be found here.