Thanks for your response CCF. I have handled only a few Southern rifles and studied photos of many more - most thanks to ALR. I too have never seen a Southern rifle, or any other longrifle for that matter, with the lock secured in this manner. There is no lock bolt. I was just studying the photos, and the rifle appears to be very well made. a slim build with nice tight inletting with the exception of a few areas, such as around the breech, where one could expect things to loosen up over the years. The forearm is very slim, as it should be, and the ramrod appears to be about 2/3 exposed. These are areas where, in my opinion, later recreations frequently miss the mark. The butt plate has the long return one frequently sees on Southern rifles and the tang extension is well fitted. I suspect it might extend all the way back to the BP extension, but the photos I have only show it extending up and over the comb. The trigger guard appears to be hand forged with some fancy file work and the buckhorn rear sight is set into a dovetail which has been raised at the edges with a chisel.
In my opinion, everything other than the method of mounting the lock suggests an original Southern rifle.