Unless you can have the barrel wall thickness measured on both guns I would buy the one which has not been refinished. If the Maton had the bores honed or the outside restruck when reblacked they might be rather thin. Safe to shoot with proper loads but easily dented thin barrels are a problem in a field gun. And both guns should be shot only with proper loads for their proof. Not factory Anerican shells with 11k psi. Be kind to old guns and they will be kind to you.