A good looking knife, congratulations !  I like it, the blade especially... 
 
As already noted, the blade does look very much in profile like some of those cut-down sword blades to be found on 18th century or older Scottish Highland dirks. I have seen very similar in museums. 
 
From the images, I would guess the staghorn hilt does not appear to have been on there for so long, but of course it may seem older when handling. 
 
A great first acquisition...
		 
		
		
		
		
		
		
		
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