Just a geeky point of clarification:

You can't really rely on old photos to accurately determine belt direction. Old tintype or ferrotype photography produced prints that were mirror images of reality. So what looks like a belt with the excess on the right side would in reality have the excess on the left.

There's a famous picture of Billy The Kid that shows him wearing his pistol on his left hip that has given rise to myth that he was left handed. He was not. That is a tintype photo. If you look at his buttons on his clothes you can easily tell the photo was reversed. Billy was right handed.