Just my 2 cents -- I think the term "West Virginia Swirl" came into being initially as a way to refer to mibs that were generally believed to be from the WV region but weren't recognisably by a "known" company -- basically nice to better-than-nice examples that couldn't be labeled as "Ravenswood," "Akro," or any of the few other marble companies that were the first to have their products recognized individually. The term may gradually fall out of use now that the other, smaller companies' mibs are being studied, and more and more can be attributed to their makers -- like Alley, which is beginning to come into its own as a producer of some really outstanding marbles. Maybe none of the other companies produced such a variety of stand-outs, but I know that you guys out there who have more access to and experience with swirls that might be Heaton, Cairo, etc., will eventually figure some of it out. For instance, I really like the distinction feelinmarbelous has shown us here between Alley & Ravenswood flames. When I saw it, I realized it was something that had been kicking around in my subconscious (or somewhere), but it hadn't surfaced as an "ah-ha" until just now, with good comparison photos. Thanx - - -