Jpebon,
Welcome to the forum and thanks for sharing photos of your musket. What you have appears to be a fowler style with french architecture. My first thoughts when I saw the profile was central Massachusetts or Connecticut valley. The sideplate, buttplate, and triggerguard (the inletting that remains) are all much more angular than I'd expect to see on a typical Massachusetts gun, and lack of a triggerplate says something to the effect that this was not necessarily a wealthy-man's gun. The stock appears to be Cherry, and the lock could be either French or English - the distinguishing factors were sawn off when it was converted to percussion. Do you have photos of the inside of the lock, forestock and ramrod pipes? Given the worn holes in the sideplate, it could be a period restock of earlier parts, which was quite common for guns like this. I would guess it was built between 1790 and 1810. PM sent about value and the triggerguard.
-Eric