That's what I was implying, simply there are no known southern mountain rifles with Germanic locks on them. We are all waiting for a documented one. that said, I would post your lock for a trade, or sale, and go from their. I have a Davis late english with the square back I would even consider trading though I already have two large Siler's. The Gunsmiths of Virginia, the Carolina's, Appalachia, and Tennessee, were mostly of Scotch, Irish, and English ancestry, and very nationalistic, and would sooner throw a german lock in the scrap heap, or crucible than use it on a gun of theirs.
Bill