WHAT DOES DAN WESSON SPECIALIST MEAN?

Pistol Pacs ended up designated by a “P” then the model range of the revolver frame, then the barrel shroud sort (blank) for traditional, “V” for vent, “VH” for Vent HeavyIn addition it has a 2 line roll marked shroud likewise. I realize they transitioned to one line roll mark barrels, so perhaps it is a transition gun or a single piece