It's stil very contentious. I'm not certain if any of the detailed photos are permissible to publish presently - perhaps the photographer or others will add to the conversation?
There were Tilestons in the bay area (Boston), but I believe some research has also turned up some Tileston candidates in VA or MD.
It' a very nice rifle, and the furnishings are first rate - not crude at all, very comparable to modern "wax castings" of identical brass hardware. Whoever forged it definitely knew what he was doing.