Good Find 10th , that is the Venetian arsenal mark , its found on some schiavonas to, your blade could be  variation used in this type and the curved blade is common on naval swords. I always liked these, they show character trough simplicity and even tough they are simple they have a certain elegance about them. 
kind regards 
Ulfberth
		 
		
		
		
		
		
		
		
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