I got this amp some time ago and as I've read many sites on the history it appears that the 12" speaker cab was not as common as the (2) tens or the single Tone Ring 10" speaker. So, my 12" has a recessed mounting baffle that has spaces on both sides providing a port. So what does the "tone ring" version look like? Never seen any pictures and I wonder if my 12" with recessed baffle is considered a tone ring design? THe head is an early version 6G9-A. The baffle looks original and not modified. Not much info on Ampwares or other vintage fender amp sites.