Some features suggest even East Tennessee might also be considered as an option. The position of the cheek piece, for one, and the squarish profile of the nose of the comb, along with the length of the bp extension and the shape of the toe line. The proportion of tg bow to rail is reminiscent of primarily sw va. but has also been attributed to e. Tn. The spur looks odd as if truncated from a longer, possibly recurved one. Then there is the pin placement: while the rear pin is behind the entry, the foremost pin is close to the nosecap. The two screws in the tg are also intriguing, as well as the shortened front extension on the tg. The profile of the wrist in height almost suggest sw va. again, but its length is not compatible. The tang is almost a hybrid of the NC two screw tang and the longer 3 screw tang found in some parts of se Tn.
Just thoughts as they come to me. I think no matter what that it is a southern iron mounted rifle quite a bit earlier than run of the mill and therefore important to study.