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			Hi everyone, I've been asked to open the tach and for photos of the backside.  It is indeed model SST-801 and there's two ink stamps, "552" and "SUN 64" - maybe the tach is from 1964?  Either way, it's certainly unused and clearly NOS.  I dug up some universal wiring and will include all as shown.
 
 Thanks again for the interest all,
 Anthony
 
			
			
			
		
			
			
			
			
			
			
			
			
			
				
			
			
			
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