You guys are probably right. Looks like I got some of my letters turned around. Not sure about when and why, but based upon the research that I did over a year ago, including the info on this site(Sunn,) it was my understanding that, at least at one time, the single 18 folded horn cab, like many other manufacturers, offered the standard Magna speaker and the optional Vega speaker, hence the M and V designation. I don't recall the other sites from whence the info was obtained or I'd give the site. The info on this site(Sunn) shows the folded horn cab and calls it a 118 MH, and further states that it has the Magna speaker. In any event - I have the older ones just like in the pic on this site(Sunn) with the silver badge but with the 18 Vega. I'm sure that this is all clear now.
Just let the Sunn shine through.