You mentioned William stamps and I was wondering if you could have a look at the sheet metal cutlass I posted earlier(#6), which classically resembles a merchant type of the first quarter of the 19th, has a very weak crown stamp with either a WR or VR. 
 
As you suspect it is a VR stamp, if WR it would be too 'off center'.
		 
		
		
		
		
		
		
		
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