Un uomo, un cavallo, una pistola (The Stranger Ret (1967)

The Stranger happens across a murdered postal inspector and a gang of bandits set on a prize of stolen gold which should be transported in a stagecoach. The Stranger, a sharpshooter named En plein and a treacherous postal agent try to get their hands on the gold. Source: SWDB www.spaghetti-western.net