Might want to look in the Old Testament (a.k.a. Dillin) Plate 7, Laidacker Collection, rifles 1 & 2
No. 1, C.T. Stahl 60 balls to the pound. Sellers lists him as Lancaster, PA, 1810 - 1817, flintlock Kentucky.
No. 2, I.G. Wren, 120 balls to the pound. Sellers says I.G. Wren, unlocated, flintlock Kentucky.
This question has come up before, fairly recently. Think I recall could be one in
The Longrifles of Western Pennsylvania: Allegheny and Westmoreland Counties,, R. Rosenberger & C. Kaufmann ©1993 Not sure though.
Since early '51 I have been in love with that C.T. Stahl.