Been several months since I asked last-may be some-one new who can tell value of Belgian[proof marks tell] 12 ga dbl bbl made by JAMART7CIE,LIEGE.REGULAR BBLS[NOT TWIST OR DAM].Prince whatsisname grip."MATADOR" stamped on rib.Horn buttplate.Excellant balance+'feel'.Choke 18.3/18.4.DBL Trigger.Bought it for $350 .Only ref I can find on net is old French hunting arms book.Mentions Hamart in same paragraph with Purdey.Assume made circa 1930.Any of you shotgun-o-philes have a clue?