IMO these 2 Jawa demam hilts are quite different, the one from Sajen seems to originate from Sumatra and the primitive one from Loedjoe possibly from Sumbawa. I have one piece also in primitive JD style deemed to originate from Sumba or Sumbawa (see picture). 
Best regards
		 
		
		
		
			
		
		
		
		
		
		
		
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