just got a 3rd one; a small Bosnian knife or little dagger. 
Some call it kama, other cakija others again noz... 
Depends whom you are talking to and where.  
It is # 3 on the pics. 
 
Nevertheless sharp they are and deadly as well. 
Nicely decorated with similar paterns on the blade, small curved lines and dots ( triangle and circular) 
 
First one with a scabbard although nothing fanciful like the bicaks who have wooden scabberds with copper decorated overlay.  
Only metal left; could well be that either cloth or leather did cover it at some time , which has gone or deteriorated through the times. 
 
Timewise diffecult to determine; could be anything from 1860ies to 1930ies. 
Handle or grip is bone, decorated with colored circular signs ( not as nice as the bichaqs which have inlays) , one without quillion and two with. 
One without a rear bolster / pommel and two with
		 
		
		
		
			
		
		
		
		
		
		
		
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