Crew or equipment visible: In the final shooting when the bartender shoots Mr. Books, the squib detonation wires are visible on the ground and leading up each man's leg.
Crew or equipment visible: When Sweeney is coming at Books with the table in front of him, the squib detonation wires are visible on the floor. The same wires are seen when Books falls to the floor after being shot by the bartender, and when Gillom shoots the bartender the second time.
Continuity: In the final shootout, Books fires his belly gun four times, before he drops it, and his holster gun three times. The two nearly simultaneous shots through Sweeney's table are so fast, they have to be one from each pistol. After Gillom takes the holster gun and fires it three times at the bartender, it should be empty. But as he prepares to throw the gun away, it is obvious there are still loaded rounds in at least two chambers.
Revealing mistakes: When Books shoots Cobb in the final scene in the bar, Cobb's blood pack is clearly visible beneath his shirt.
Continuity: Towards the end of the movie, before the final gunfight, Sweeny drives up and parks his automobile outside the Metropole. As he gets out of the auto, he raises the tiller. Moments later when Books arrives at the Metropole, the tiller on Sweeny's auto is in the lower position.
Continuity: After he discharges Dobkins setting a foot on his buttock, and Dobkins stretchs out on the ground, Books throws away his hat which falls on his feet. When Dobkins picks it up still lying, it is on his right side almost about his hip.
Factual errors: When Books arrives in Carson City, the newspaper he buys says "Monday Morning January 22, 1901" at the top. 22 January 1901 was actually a Tuesday.
Continuity: Books' hair goes from being parted on his left to his right then back to his left after he tells Marshal Thibido he (Books) is going to die when they first meet while in Books' room.
Anachronisms: In the opening scene labeled as being set in 1871, a pair of Colt Peacemaker revolvers with 4 3/4 inch barrels is shown. This model was developed for the US Army in 1873. Civilian sales started in 1875, and the 4 3/4 barrel length wasn't available until 1877.
Crew or equipment visible: When Sweeney drives up and stops his automobile outside the Metropole, there is a visible "stop" device for the car placed on the ground at the left front wheel.