Hello: 
 
The key (lock) is Spanish, conversion of a key (lock) Spark (flint), and instead of the rake (frizzen) has applied the "keep-bait". Displays the original holes, covered. The bronze piece that has been applied to the mouth, to mimic a blunderbuss, is false, and stock shape mimics Spanish butts. In short, I think a decorative piece. 
 
Affectionately. Fernando K
		 
		
		
		
		
		
		
		
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