I have been studyng this and my thoughts: John yes this gun is exciting to me! Not sure about the pan, but my thinking is there was some period lock repair work which was probably common to reinforce things. I don’t get the sense that this gun was messed with at all - my brother found it in the basement level of a consignment antique shop near philadelphia.
I have not found any clues to tell me it is a restock and I have searched.
-There are no signs of any old lugs or slots or evidence of changes under the barrel.
-The lug for the nose cap is an “extra” meaning close to the next lug. It matches the others.
-The stock is definitely old / of the period and in super shape.
-The forward lock bolt does not rise to require a channel under the barrel and there is not one on the underside f the barrel (sometimes this can be a sign of barrel reuse if there is a ghost channel without the need for one in the stock).
- the barrel walls at the muzzle are super thin.
To me it looks like the maker purpose made this as a military gun, where the same shop also made the club butt guns. I think it is the samemaker as grinslade # CB 7.
Comparing to grinslade CB 7:
-the butt has the same overall form, with the comb, lack of flutes, and slightly convex toe line. It just does not have cheek pieces or as much embellishment. Whoever made these CB guns may have made other gun forms also.
-The tang carving seems much the same as the other CB guns, and the side plate and trigger guard both appear to be the same exact pattern outline as CB 7, but made plain without engraving. The sideplate on this gun is more heavily beveled.
-The fore stock wood is shaped in an unusual way with a triangular shape, like CB 7 appears to be, and like CB 16.
Other:
-The width of the stock behind the lock is very wide at 2.10” and the butt is 1-7/8 wide.
-The brass furniture is all in excellent shape, nothing bent or seems to have been disturbed or moved, or reused.
-The butt plate is a very nice french design. Revision: the butt plate looks filed down a bit on each side, moreso on the cheek side. The wood sides of the butt were shaved down also.-the butt plate base and stock toe line are squared, not rounded. The butt plate is a bit over 5” tall so the squared toe at the base of the plate seems original. I don’t know if the club butt toe lines are rounded or square.
-the stock shaping around the lock and side plate are done the same as the pictured CB guns, for example dentical to CB 16. Seems to be very early form without much wood around the edges.
-The wood of the stock protrudes slightly, in a cone shape under the end of the nose cap.
-The ramrod is exactly the same as some of the CB guns like CB 6. This one appears to be jagged, or threaded at the low end, like it was made this length. The ramrod is steel. It is 32-1/4 inches long (barrel 33-1/2) and looks like it was threaded with part of it broken off at this length.