Your rifle is a percussion era Indiana rifle, as the great barrel signature strongly suggests. I have asked Jeff Jaeger, the person most knowledgeable on Indiana gunmakers, to look at your rifle and comment on it. He probably has more info on the maker than anyone else. A couple of other Wandel rifles have been seen in Indiana, but I don't know much about the maker.
I do have a slight concern about the stock...it looks almost too clean, too new, raised edges too sharp, to be the original stock...but maybe it is, and just had a "parts off" refinishing. Shelby Gallien