Okay, so one hint : the actor facing him is Giuliano Gemma, who once starred as Captain Montgomery Brown aka Ringo, in Ducio Tessari's The return of Ringo, number 10 in Quentin Tarantino's Top 20 favorite Spaghetti Westerns. I must add that I took my name from this movie, the first spaghetti western I ever saw.
Now, the question remains: what is the title of the movie from which I took the picture?