As a longtime Kowa spotting scope user, and medium Format film user (Zenza Bronica SQA), I had to get a Kowa Six sooner or laterNow it is here! My camera (see Picture) is marked "Kowa Six", but you more often see Pictures of "Kowa/Six" Is my "Kowa Six" the slightly revised second model of 1970? It has Serial Nr 328xxx (85 lens 1223xxx). has anyone Serial numbers of Kowa/Six or MM models for comparison?