I am thinking you may be right. Ardessa calls this rifle a "hawken" in Europe, minus the patch box (which truth be told, I think the patch box on most modern repro hawken-types looks hideous and serves little purpose other than decoration). I have seen one of the Ardessa rifles recently for sale on another site, a 50 cal percussion, if my memory serves correctly. Same 32 inch barrel, stock lines look similar if not exactly the same, two wedge pins for barrel retention. Same sights also.