Fine firearm , I think it is too ornate to be a military firearm .
. The 3 small marks on the barrel flat look like English marks but need a close up with as much crud removed as possible .
I have just had a look at my Flintlock Fowlers book and it looks like a club butt fowler which either came with a bayonet or was fitted with one in the French and Indian war or the American revolution.
Besides a better look at what appear to be proof or makers marks we need the most important photos for identification , that is a close up of the lock and trigger guard/grip from the righthand side . Also the right of the Butt .
All the interesting brass bits do not help in identifying the firearm , except to say it is a special and interesting firearm , a lot of American made fowlers had that sort of fancy brass work
The CS in the wood is most probably the owners initials
TFoley if you read "Flintlock Fowlers , the first guns made in America by Tom Grinsdale" you will see all the guns in the book were full stock , some were fitted with bayonets as I said above .
These early American fowlers usually had British made barrels and locks , so Brit proof marks are not out of the question
