Wapaks, for the most part, are not very well cast. There are the exceptions (a friend had a super smooth, light one that was well cast) but most are wanting in the finish department. Indian Head Wapaks are pretty heavy and vary a lot in their details as do the other Wapaks. Many Wapak pieces have other makers' ghost marks for which we can't seem to agree on how the marks came to be but it appears that Wapak would cast many of their pans from another maker's pan as a copy or use old, modified patterns to cast their ware. So your skillet has its particular charm but cooks really well. Hold on to it and enjoy.
Steve