Found this old double barrel in gradma's shed. Side by side with hammers. Left side hammer and mounting stud are missing. Can't find a model number but found date of r4-MAR 29,83 on the receiver. Guess the serial number is 75863 on the barrel, receiver and forestock. Letter F under serial on receiver and barrel. Barrel engraved with Royal steel and Hunter arms co makers Fulton NY. Side plates, no engraving other than L C SMITH. Any feedback?