I had two different Wagner sandwich toasters years ago with different height bases. The height difference was not a great deal but something like 1/4 to 1/2". One had wood handles and the other had wire coil handles. And I think one was unmarked but obviously made by Wagner and, I think, also had a catalog number. I don't remember if the bases and irons were interchangeable or slightly different in size or which of the two irons had the higher base. These are pretty rare pieces it seems.
Steve