Hi Jim, 
 
Thank you for sharing your excellent research. Since we originally discussed this I have constantly been looking for these stars and moons. They are very prominent on later 18th century English military weapons with German blades. 1788's (top) and 1796's (second from top). I have pasted a few of the examples I have found. I suspect Castle's observations are regarding civilian weapons. 
If I find any pre 1750's with the etched symbols this will be the first place I will paste them. 
 
Thanks again Jim! 
Jeff
		 
		
		
		
			
		
		
		
		
		
		
		
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