I have a shotgun that says "Hopkins & Allen Arms Company Norwich, Conn. U.S.A." on the side. It also has a code behind the trigger guard that says YT844. It is a 12 guage single shot shotgun with exposed hammer. I have tried to do some research on it but cant seem to find out more than it being made in the late 1800's. Anyone have any info on this company, a better guess as to what year it was made, and a possible price range for this gun?