Royal Manufacture of Charleville

[Tinman]

I am looking for someone who might have some expertise in the area of barrel marks.  I have what I believe to be, through months of research, a French infantry M-1768 musket.  I think the barrel markings on the underside are related to the arsenal in Charleville.   I have more photos of the gun itself and have been on other forums, but I'm hoping this is the place to be!