Rich,
You might want to look at some rifles by the Sheetz and Lauck families, from the Winchester area. The earlier examples typically have a straighter, wide butt piece, with the latter rifles having more of a concave shape. Look at the library here on ALR. Gary's link also has some nice examples, and is very informative.
There's a lot of York County and Littlestown School influences, I think, associated with rifles made in the North Western / Winchester area, which makes sense based on travel routes, etc.
There's also the "Klette" rifle out of Stevensburg, VA. Might be more of a Piedmont rifle, but a very good example of a fairly early rifle.
Ed