When Charlie Zane (Jack Warden) is riding through the mini avalanche in the gully, the same scene of him and his horse dodging by a big rock is shown twice, the second time from a slightly different angle.
Position of Jenny's hands on Hickok's shoulders when she greets him and kisses him.
When the principle characters are introducing themselves to each other in the mountain cave, Crazy Horse (Samson) asks Hickok (Bronson) "what is the old one called" referring to Zane (Warden). Hickok says, "the Cheyenne call him Ochinee". Crazy Horse responds dubiously, "One Eye? The Great White Warrior of Sand Creek? You speak crookedly". Zane and Hickok then demonstrate and explain that one of Zane's eyes is made of glass, and that he truly is "One Eye".
But this entire characterization is historically false. "Ochinee" or "One Eye" was the name of an elderly Cheyenne chief, who was one of the many Cheyenne and Arapaho peoples who were massacred and mutilated by U.S. soldiers at Sand Creek, Colorado Territory, on November 29, 1864. Also known as "Lone Bear", he was a charismatic speaker and proponent of peace with the encroaching whites.
But this entire characterization is historically false. "Ochinee" or "One Eye" was the name of an elderly Cheyenne chief, who was one of the many Cheyenne and Arapaho peoples who were massacred and mutilated by U.S. soldiers at Sand Creek, Colorado Territory, on November 29, 1864. Also known as "Lone Bear", he was a charismatic speaker and proponent of peace with the encroaching whites.
In the final showdown with the White Buffalo, Hickok pulls Worm's gun and fires the six-shooter at the buffalo 8 times.
Wild Bill Hickok often wears dark glasses. While there is a factual basis to this characterization. (In 1876, Hickok was diagnosed by a doctor in Kansas City, Missouri, with glaucoma and "ophthalmia.") Sunglasses were not invented until 1929 by Sam Foster, founder of the Foster Grant company, whom sold the first pair of Foster Grant sunglasses on the Boardwalk in Atlantic City, NJ.
Throughout the movie, Charles Bronson's character switches between Colt Single Action revolvers and double action revolvers of modern design.
When Worm (Will Sampson) gives a long gun to Charlie (Jack Warden), the boom microphone is visible.
The support apparatus for the mechanical buffalo is clearly visible during some charging scenes.
Crazy Horse only learns of Hickok's true identity when Charlie curses him at the end. However, earlier in the film, as Jack Kylene is challenging Hickok on the mountain, he shouts his name numerous times before Crazy Horse kills him with arrows. Kylene's voice echoes repeatedly. Crazy Horse would easily have heard him.