There are a ton of reproduction guns out there that were roughed up to look old in an attempt to pass them off as the real deal. If you really think it's an actual Colt Walker then get an expert to evaluate it because it could be worth a ton of money. There was a guy that lives here in my town that had a great condition model that had been passed down through his family and he auctioned it off at the Julia auction for a fortune. Good luck I hope it's real!