Dirty Harry font here refers to the font used in the poster of Dirty Harry, which is a 1971 American crime thriller movie directed by Don Siegel, the first in the Dirty Harry series.
The font used for the movie title in the poster is probably Helvetica Black, a grotesque sans designed by Max Miedinger in 1957. You can view more details about the typeface here.
Download Helvetica Font
The Helvetica font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.