Spot on Norman!  
This style of blade decoration was extremely popular in Nantes, particularly by the purveyor Caissagnard as I understand, following similar 'oriental' fashions in Eastern Europe.  
Note the 'clipped point' in the one at top, termed a 'pandour point' (Seifert, 1962).
		 
		
		
		
		
		
		
		
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