Have you any more pictures? 
A few points. 
The Inletting looks v rough and lacks finesse you normally see on weapons of this period 
Generally the wood discolours where it butts up against the metal over a few hundred years. 
 
The squareness in the frizzen and the lack of rounding where the toe hits off the spring might be a clue to recent manafacture 
 
 
 
also it is  a left handed mechanism which is a biit unusual or is the image reversed 
 
Looking on my phone so image is not great so I might review this post later 
Regards 
 
Ken
		 
		
		
		
		
		
		
		
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