Just drag that Yankee $100 bill around the yard and run over it a couple of times with your car and it will look original!
I wish I could remember the source of this, but it is my understanding is that S&W, located WAY north of the Mason-Dixon Line, did not sell to the South during the war, mostly since there were land and Naval blockades on gun running. My guess is that most that ended up in Confederate hands were picked up on the battlefield.