Detlef: 
  
 A couple of other suggestions about the bands and ferrule. Could these be aluminum or possibly galvanized iron (i.e., iron plated with zinc)?  
  
 I tend to agree with Jose--post-WWII or thereabouts, and from the Visayas (possibly made to order for a US serviceman). The scabbard style looks eastern Visayan to me. 
  
 Ian
		 
		
		
		
		
		
		
		
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