Thanks to all for your help! Seems we have the answer of a date and type, the cut down barreled brush gun and a possible reblue; though they did the receiver and barrel both as the match is consistent. As an aside, family member’s passing left his original Ithaca 37 to the widow, wish we still had that early sixties Riot gun. One of the first shotties I ever fired around 70’ . It sold me on Parkerizing as it held up like no other.