Yesterday I went to a gun show and meet a man by the name of Sam Hinson he told me he had been making guns since 1959. He had a kentucky style flintlock pistol that he had made, he said that the lock was made by a Willie Cochrane, or Cochran, im not sure of the spelling, He also told me the barrel was a green river barrel, it is a 50 cal.,and is part octagon and round barrel. The vent is drilled into the side of the barrel, with no vent liner. The gun is really well made. Any information you can shed on the maker and the lock would greatly be appreaciated.