Patrick, 
 
I Have Not seen this one before, so thanks for the photos! 
What you have, I would have said I  feel for certain, is the Charleville musket, model 1766-68. 
But, as the experts say otherwise I defer! 
This model I mentioned above has the extended tail to the nosecap that tucks into the middle band. 
I do not know if this model had the rather forward looking and novel screws that also acted as pins  for trigger and guard, Or if these were a later innovation. 
I should look for photos of the off side. 
The shield obliterated could mean it passing from service to another area, but I do not know. 
 
Richard. 
PS, 
Can you post a photo of the lock, mortise, and lock work?
		 
		
		
		
		
		
		
		
		
			
				  
				
					
						Last edited by Pukka Bundook; 8th January 2020 at 11:48 PM.
					
					
				
			
		
		
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