[1] It was co-written by film critic and future director Dario Argento.

[1] The films script showcases several traits that would later become part of Argento's directorial career.

[1] It grossed a total of 106.073 million Italian lire on its release.

[1] In a contemporary review, Pietro Bianchi wrote in Il Giorno that the film was "a skillful attempt at applying the Western formula to the Gangster movie trappings"[1][3]

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