I've noticed that the early Single Six rear sights seem out-sized and are blocky and sharp-edged.  The change to a sight with rounded ends and softer edges seems to have happened with the grip frame change to XR3RED.  Am I correct in that observation?
Did Ruger make those or were they vendor supplied?
I did this to my Lightweight shooter - much kinder to leather holsters:
			
			
									
						
							OM Single Six rear sight
OM Single Six rear sight
"My greatest fear is that, when I die, my wife will sell my guns for what I told her I paid for them."  Anonymous Collector
			
						Re: OM Single Six rear sight
Hadn't noticed that before.  I would think Ruger would have cut these themselves from extruded stock, but not sure on that.
			
			
									
						
										
						Re: OM Single Six rear sight
Actually, it looks like it may just be random dates and models around 1957???
			
			
									
						
							"My greatest fear is that, when I die, my wife will sell my guns for what I told her I paid for them."  Anonymous Collector
			
						