Death Rides a Horse

Death Rides a Horse aka Da uomo a uomo, or As Man to Man is a 1967 Spaghetti Western directed by Giulio Petroni, written by Luciano Vincenzoni, and starring Lee Van Cleef and John Phillip Law.

Each of the outlaws bears a characteristic that Bill memorized while watching his family slaughtered. One has a tattoo of four aces on his chest, another a scar, one a distinctive earring and one a necklace bearing a skull, while he saw the face of the fifth.As he begins his journey, a gunfighter named Ryan Lee Van Cleef is released from a prison after servingyears there. He was framed for an armed robbery by the very men who murdered Bills family. ........

Source: Wikipedia