I am helping a friend ID this black powder flintlock pistol. It appears to be 58 cal. Bore diameter is 5/8 inch. The marks on left side of barrel reads "Pasadena Firearms Inc Co." Above that it reads "Japan" Under hammer and strike plate there is a British Crown and the letters GR. Behind the trigger is the word "Tower" I believe this is a real old reproduction and I am certain it is fireable. Please view the pics and tell me exactly what we have here and what the value might be. Thanks / Mgfrd