I just got a Sunn 200S cabinet and the bottom speaker was replaced with an Eminence square magnet speaker. I'm not sure of the date, but it says 67-7040 on it, which might mean the 40th week of 1970. 67 is the manufacture code for Eminence. I'd like to get $30 plus actual shipping. USA only please. Local is always good. There are no dents in the cone or dust cap, although the reflection looks that way. It looks like something might have spilled on the dust cap, but the function is not impaired at all. I used it for a few gigs until I found another D140 to throw in there and it sounded fine.
8 ohms. Watts? Well, I have no accurate information. It's a vintage speaker, so I don't think it's very high powered by today's standards. Maybe 100 watts? Maybe more? Probably depends on the cabinet. This is what I found from an ad from a speaker that looked pretty much identical: IT IS A 15", 8 OHM SPEAKER WITH AN ALUMINUM DUST CAP, A 2" VOICE COIL, AND A 54OZ CERAMIC MAGNET. A CONSERVATIVE THERMAL RATING BASED ON A 2" VOICE COIL IS 100 WATTS.