Arjan:
  
  Well, I get to partly answer my own question.
  
  
	Quote:
	
	
		| ... Do you have additional information that this term refers to a particular  sword? ... | 
	
 I have come across a footnote (see attached) in the following reference:
  
  Shelford R. An Illustrated Catalogue of the Ethnographic Collection of the Sarawak Museum: Part I Musical Instruments. Journal of the Straits Branch of the Royal Asiatic Society, vol. 40, p.2. June, 1904.
  
  The footnote implies that the 
tilang kamarau was indeed a sword of relatively recent origin (circa 1900) and was quite common at that time. Furthermore, the note suggests that this sword may have been a sabre similar to a 
parang niabor.
  
  Ian