Never seen one exactly like it. It's a muzzle-loading cap-lock pistol. Note the lack of a ramrod. Those type of guns were for gentlemen who needed something beside a sword or knife for self defense. Ladies had what were called "muff pistols," but they were smaller and carried inside the fur muffs that were used to keep the ladies hands warm. The lack of a ramrod on this gun tells me that they didn't go out and practice shooting, what they would do is every couple of weeks they would stop by the gunsmith or store where the pistol was purchased, and fire a shot out of the gun, then the gunsmith would clean and reload the pistol and the gentleman would again pack the gun with a fresh load. It certainly looks antique, does not look to be American made, I see a proof mark on the barrel, sometimes those can tell you where the gun was made. Other than that I can't give you much help except IMHO it's not a reproduction. Good find. Oh yes, check to see if it's loaded, you would be surprised how many old guns are. Take a rod that will fit in the barrel and push it all the way until it wont go any further. Mark the rod at that point. Then take the rod out of the barrel and lay it along the top, and if the gun is empty the rod would go in even or just past the nipple under the hammer. If it doesn't, be careful because it is probably loaded. It won't go off unless you put a cap on the nipple and drop the hammer on it, which wouldn't be a wise move on your part.
