That rifle, with its shortened barrel, looks just like the Sheets rifle I picked up at a small Midwest auction at Mooresville, IN, a bit southwest of Indianapolis, if I recall correctly, about 30+ years ago. Everything, including all inlays, look the same, and the rifle was percussion when I acquired it. I sold it to a major VA collector in the KRA, and he contemplated having it stretched for a year or two but eventually got a similar rifle with full barrel and traded the shorter rifle off.
Shelby Gallien