By what I can see, the lock-work is very competently done and the sort of lock that would not surprise us or appear any way inferior on arms of European/British  origin.  Nice to see the stirrup on the tumbler. 
 
Can't tell on the lock mortise, but may be a shade down on European inletting. 
Very nice pistols!
		 
		
		
		
		
		
		
		
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