Re the lion head, yes, similarities, and I have seen these kastane hilts. 
 
I don't have time at the moment, but I'll see if I can find some Siamese pics that influenced my feelings. 
 
Re the variation of the motifs in execution, what I think I can see is perhaps a photo problem. This thing might look a bit different in the hand.
		 
		
		
		
		
		
		
		
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