I've got a EVM loaded Mesa 1X15. The seller on Ebay said that it was a 200W, but looking inside, it's an unlabeled speaker(obviously EV due to the frame, and it's got EV on the dust cap). I didn't think Mesa ever used 200W EVs in their cabs. How would I be able to tell the difference? And did they ever use 15B speakers? The dust cap has EV in gold lettering.