Factual error: To get back the money they (il)legitimately won, Chaney fights with Pettibon's men inside a bar. They brawl near a pinball machine identifiable as a modified version of "Majors - 1941" (you can see its logo distinctly), which was manufactured, obviously, in 1941. The movie is supposed to be set in 1933. (00:37:10)
Factual error: Chaney vandalizes Pettibon's bar shooting 8 times from the 6 rounds cylinder revolver he pilfered. (00:39:00)
Factual error: In the establishing shot of the street where Chaney rents in 1930s New Orleans, you can see the sign for Angel Sheet Metal Works, which was created in 1968. (00:13:15)
Factual error: When Chaney shoots towards the bar counter, the bar sports a calendar that shows exactly 29 days in the month. The only possible month with 29 days the first being on a Sunday would be February of the leap year 1930, but the movie is set post-prohibition. The scene is not set in February anyway - minutes later they show up at Lucy's home at 5 am and the sun shines.
Factual error: When Bronson is walking into the city through the railroad deposit, he walks by unused wagons branded Missouri Pacific Lines. The wagon bears the slogan "Route of the Eagles" which was coined and standardized on wagons only in the late 40s. The movie is set in the depression years. (00:02:45)
Factual error: The movie is set during the Great Depression, in 1933, but Charles Bronson gets in town aboard of a freight train pulled by an EMD NW5 diesel locomotor, introduced over a decade later. (00:01:15)
Factual error: As the protagonists say goodbye at the end of the movie, Speed pulls over in a railroad deposit. The wagon he stops by shows an odd graffiti. Upon further inspection, you can tell that it's actually an attempt to conceal the giant logo (the so called "split rail" logo) of the Illinois Central Railroad, a logo used by the company between 1966 and 1972, way after the period the movie is set, in the 30s, when the logo would have been the green and yellow diamond one. (01:28:30)