I know some of you out there have been fortunate enough to pick up a vintage Sunn 6x12 cabinet with the original speakers, and I know that both Eminence and Jensen supplied speakers (specifically the Jensen C12N). But I’m curious as what the speakers were that had the aluminum dust covers with the little breathing hole. Are those by Eminence or Jensen (or other)? And are they alnico or ceramic? I appreciate your replies, and any pics you wanna post would be cool too!