I recently came across this beautiful, custom built swivel breech flintlock at a local gunshop. There are no markings on it at all. I have been told that the rifled barrel is .48 caliber and the smoothbore is .56 caliber. It does not appear to have been fired, if it has it wasn't very often. There is some play between the stock and barrels where they swivel. I took the locks off to look for markings, but didn't find any. There are two nuts to tighten the gun up, but I'm out of my element and be decided to leave it for someone who knows more about it than I do. I am out of my wheelhouse with this one. Again, there are no markings anywhere on the gun. I have been told that the value can range anywhere from $1500-$3500. I'm asking $1800 for it, because I don't know much more than I've already listed. Feel free to shoot me an offer on it. I will do my best to answer any questions you have.