I was wondering if anyone can identify the exact note they used for the prop? It's visible for a few seconds in this clip here at 0:50. This was when National Currency was issued by local US banks so it's a red (or brown?) seal issue, but I can't make out much more.

PS; If it helps the film is set in 1882 although the filmmakers might have used a copy of an anachronistic note issued after that for the prop.