Hi Michael:  
 
Thank you so much for all the information! I never would have guessed these were for military use. From all the pictures I found on the net, I did notice that same concentric circle motif on the reverse of them.  
 
@Fernando:  
 
Thanks for the welcome, and I'm already impressed by the depth and breadth of knowledge on the site!  
 
Best Regards,  
 
A.
		 
		
		
		
		
		
		
		
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