Anthony, you have a very nice "ghost" skillet. I would say that Wagner acquired "ERIE" patterns and then modified them. If Steve Stephens was on here, he would tell you that somebody took an "ERIE" skillet and used it as a pattern, but he would not know that, and neither do I, but, of all the "ghost" skillets that we see, in my mind, I am of the opinion that these manufacturers sold patterns to each other when they were finished with that particular type of run.
Now when they modified these patterns, the former words were not supposed to show, but over time, from use, the material used to cover the former words/markings would wear away, and again the former would bleed through in the mold, thus making what we call a "ghost" pattern. Clark Rader has a skillet that has the current manufacturer, and two ghosts, so that pattern had been modifed two times.
And Anthony, your ghost is very pronounced, some, most actually, are not that pronounced at all.