Hi Jim and Templar, 
 
While basically consistent with the  opinions given identifying this as a gunner's dagger, I agree with Jim in that the absence of gauging is very unusal, as well as the presence of the serrations. I doubt whether these were intended to 'clean' the touch hole as they would have continously widened the hole. 
 
As to dating, I should attribute it to the mid-19th c., based on the clear 17th c. style of the Historismus period pommel. 
 
Best, 
Michael
		 
		
		
		
		
		
		
		
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