My dad had a Hercules, but not a Royal Prince. Is that a model name for a deluxe model? His has the original Hercules hub and and chainguard. It also looks like it was repainted with a brush. He bought it at a garage sale for a few bucks. I told him that it was pretty old and not a common bike so he knows not to give it away. He really likes it, so that probably won't happen.