I have a Browning 12 gauge '3-shot' (emblazed on the forearm underside) that was my late grandfathers. He was a gunsmith many years ago. The serial # is B8xxx, which I believe the 'B' means it was one of the Remington made models of the 1930's or 40's, correct? I can not find any more info on this model. Could you possibly enlighten me as to the history and value of this beautiful gun? It has the 'humpback' receiver and long smooth barrel. Thank you for any help you may have to offer.