Ian, 
 
I think it's celluloid. I've smelled real amber, and though this looks a lot like it, I just don't think it is.  It has been in a smoker's home as well, but even with all the smells mixing together you're right about the moth ball odor. 
 
Thanks for the help. 
 
-d
		 
		
		
		
		
		
		
		
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