I just saw the film about P.T. Barnum, "The Greatest Showman".
I think they did a commendable job presenting Barnum's earlier years.
However, in a barroom scene that I'd figure took place in the 1850-60
era, you see a player piano.  Such devices didn't appear for another
forty years.  And you hear it playing without anyone pumping it!

Still, the movie was an entertaining look at a remarkable man.

Tom Sendall
Piney River, Virginia