So far as I can see I agree with Gav that this is ivory and with you the low silver.  I would even say that the style of hilt profile points to an earlier piece, perhaps 1900 or earlier.  Also may not be Mindanao but Sulu, though this last part I am not completely sure until I see the top of the guard. 
 
Congrats and looking forward to more pictures.
		 
		
		
		
		
		
		
		
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