Goofs

When the gang escapes the hanging, the townsmen go after them. They are told to take a rifle, any rifle, and give chase. When they get in the big shootout, the townsmen only use revolvers.

When the undertaker holding the rope in his left hand, his hands are clasped together. He turns toward the gallows and the next shot shows him with the rope in his left hand, but his hands are dangling at his sides as he starts up the gallows stairs.

The position of the nooses around the necks of the gang changes between shots. From on the shoulders, to hanging down from the necks, to back on the shoulders.

Near the end, Mace staggers over to recover the saddlebags lying on the ground next to the building. The bags go from full shadow to partly sunny to full sun in just a few seconds.

After the sheriff has captured the Bishop brothers, Maria's right arm is across her waist. The camera immediately goes to a closeup of her, and her right hand is dropping from her throat.

The clothing on nearly all of the male characters demonstrates stitching that would require an electric sewing machine to manufacture. These were not commonly available until after the turn of the century. Not a goof: the electric sewing machine was introduced in 1889. However, the treadle sewing machine was invented decades earlier; Singer was granted an American patent in 1851.

Maria (Raquel Welch) wears a blouse which has buttons up the entire front, as does the sheriff (George Kennedy). This style of clothing wasn't commonly available until the early 1920s, about 55 years after the film's setting. Not a goof: Women's clothing in the 1860s featured button fronts; blouses were introduced about 1862-1863. Men's shirts also buttoned up the front.

After killing all the Bandoleros at the end of the movie they're laying dead everywhere. After burying the brothers & the other members of the posse there is not a Bandolero to be seen laying dead. I'm sure they didn't take the time to do anything with them after they had just tried to kill them & killed their friends.

This movie takes place just after the Civil War, yet the hangman claims to have just passed through Oklahoma City. Oklahoma City did not exist until 1889, after the land run.

The action is set just after the Civil War, but the $10 bill sticking out of Mace's backpack is of 20th-century design.

The real hangman, Ossie Grimes (Guy Raymond) sings "Bringing In The Sheaves" as he rides alone towards Val Verde, but the song hadn't been written yet in 1867. He sang the 1874 lyrics by Knowles Shaw to the 1880 melody by George A. Minor.

There are some serious anachronisms about the weapons in the film: The colt SAA "Artillery" revolver which carried by Mace Bishop (Stewart) didn't invented on 1866. Mace Bishop enters the bank armed with a Winchester 92,a gun almost thirty years newer. Also,Winchester 73 rifles showed up on the final shootout scene.

When the outlaws supposedly cross the Rio Grande into Mexico, the direction of the water current indicates they are actually crossing into Texas.

After the shootout, the gang flees on horseback. Kidnapped Maria is on her own horse, not tied to one of the gang's horses. She could've simply turned around and rode back to the sheriff.