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					Originally Posted by Jim McDougall
					
				 
				I remain curious on the 'jimping' or notching along the blade at the back, often I think on dirks as well. I think this was for the utility purposes in many cases....scaling fish? 
			
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 I thought this notching was for thumb placement, even on dirks starting from the early 19th century.  Makes a better grip for the thumb so it won't slip as easily.