Eric, you feel this is the original wood, worked over? The wood does not look like old, hard maple to me, but something softer like sometimes used today. But real issue is the wear on the patchbox. Most engraving is gone, but some wriggle engraving is faintly visible. Such engraving was not common around 1780 when a classic J Graeff rifle might have been made, but rather with fur trade or similar rifles ca 1830. This got me wondering if the patchbox has been restocked or reused several times. Trigger guard is worn.
Dick, thanks for your observations. There are several J Graeffs out there that are classic Lancaster in style, one with really fine carving and a bit of engraving. Maybe you will find one. Or maybe someone will take an old rifle and doll it up to make it fancier? Just kidding! My concern is that this is a barrel, lock plate and mounts from Graeff, but rest is someone else's work. That's quite a bit of $$ for parts. But again, I may be off the deep end here, and only working from photos - dangerous.
Yes Dave re the lock. A J Graeff rifle would not carry a roller frizzen lock.
With a review of auction site sales and pics from friends, I've found about a dozen Graeff rifles, all signed or stamped J Graeff, so it's hard to know which brother made which rifle? Maybe they worked together? About half of these appear to be restocks. Bob