Factual error: Dr Schultz pays with 12 $1000 bills, but $1000 bills were not created until 1861, after the time period of this movie.
Factual error: At the beginning of the film you see the car coming around a bend and see a double yellow line in the center of the road. White center lines were used as early as 1917 but weren't widely used until the early 50s and center yellow wasn't mandated until 1971.