Factual error: On the night of 19 October 1933 the railroad workers begin betting whether A-One will make it to Portland on the 19. A quick closeup of the money changing hands reveals the $1's to have the Great Seal reverse (introduced in 1935) plus the motto IN GOD WE TRUST (introduced in 1957). Also, the green-seal Federal Reserve Notes and the red-seal United States $2 notes are of the types first introduced in 1934.
Continuity mistake: During the fight between A no 1,and Shack. Shack is cut with the ax, the ax head is coated with "blood," as A no 1 is setting up for another swing you can see the ax head behind his head, it is still "bloody," but as he starts the swing, the ax head is shiny and clean, and then it's bloody again.Dennis Gannon