Here's a recent addition I picked up from OA.  This is what Artzi (Avner?) had to say:
	Quote:
	
	
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					Originally Posted by Oriental-Arms
					
				 The origin and use of this type of folding knifes is not very clear and there are numerous suggestions: Ranging from knives to clean opium pipes to knives for cutting and inscribing on dates leaves. The origin is most probably from the Indo-China area. It has a 3 inches blade, hollow ground, 3 inches back spike and ivory handle with engraved inscription. handle. 6 ½ inches fully opened. Very good condition. | 
	
 This is clearly from SEA.  My impression is Thai based on the blade profile, but if someone (PUFF? 

 ) were able to translate the inscription on the handle, we would surely learn more.
Andrew