Hi Stu. 
Me think it's trying to grow legs to walk/swim to MY house.  LOL!! 
That is very cool!!  And would go perfectly with MY Jazail.  LOL!! 
My guess is Afghan or Ottoman.  Unlike the metal Ottoman/Greek bullet containers used to carry pre-formed combustible type cartridges (powder/paper/ball), the wood containers look like they were designed to carry just pre-measured powder charges. And a very clever design with the fabric/leather fold over stoppers.  It looks like the buckle has a roller. That might place it a bit latter in the 19th Century (?).   
A VERY neat item.  Congrats. 
Rick.
		 
		
		
		
		
		
		
		
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