For a Few Dollars More (1965)

Factual error: The El Paso newspaper is dated Monday June 15 1872. June 15 1872 was a Saturday. (00:48:14)

Revealing mistake: After Manco beats up Cavanaugh and places Cavanaugh's back up against the bar, while Manco faces him, three of Cavanaugh's henchmen appear at the entrance of the bar demanding that Cavanaugh be released. Manco turns around and kills all of them with his pistol, while Cavanaugh falls to the floor crawling toward his gun. Manco is walking toward the entrance of the saloon with his back to Cavanaugh. Manco draws his gun and kills Cavanaugh without looking at him. If you look closely at the tip end of the pistol, you can see that the only thing that Manco would have killed was the saloon floor. (00:17:00)

RLN

Continuity mistake: Near the beginning when Lee Van Cleef looks at the the wanted poster on the ticket booth at Tucumcari (just after getting off the train), there are two extra zero's drawn onto the poster (as added by the villain). Van Cleef then takes this poster away with him, and slots it under the door of a hotel room on a later scene - notice that the additional zero's have since disappeared from the same poster. (00:06:30 - 00:09:20)

Trivia: The 'whistling' heard in the background before the opening credits is that of the director Sergio Leone.

Wild, The Hunchback: Well well, if it isn't the smoker. Well... Remember me, amigo?
Col. Douglas Mortimer: M-Mm.
Wild, The Hunchback: 'Course you do. El Paso.
Col. Douglas Mortimer: It's a small world.
Wild, The Hunchback: Yes, and very, very bad. Now come on, you light another match.
Col. Douglas Mortimer: I generally smoke just after I eat. Why don't you come back in about ten minutes?
Wild, The Hunchback: Ten minutes you'll be smoking in hell. Get up!.

El Indio: Adios amigo.

Monco: You mind telling me how you got here?
Col. Douglas Mortimer: I just reasoned it out. I figured you'd tell Indio to do just exactly the opposite of what we agreed, and he's suspicious enough to figure out something else. Since El Paso was out of the question, well, here I am.