My father is passing down the subject shotgun. It was my grandfathers, who was born in 1866. The barrel measures 32" from end to end. On one side of the flat metal receiver under the barrels are the numbers 80519, with an F under the numbers. On the opposite side in small letters is something I can't make out, maybe a D and MAR 29,83. One the top of the barrels ROYAL STEEL and HUNTER ARMS Co. FULTON NY is written. Can someone tell me what I have here?