I bought an older used 63 several months ago. It came with the target stocks, which I consider a must. When I got it, it had a .101 rear sight blade on it and shot several inches high at 7 yards!! I ordered a .126 rear sight and received a .146 rear sight. So, I installed it, and it was right on. I have seen very few 63 around over the years. They are fun guns to shoot, so if you can latch on to that one for a reasonable price, that would be a good thing. 
Edit: Added photos of new .146 rear sight blade, pinned black ramp sight and whole gun with target stocks, Safariland holster. I had the holster for some time, as it was advertised for a 4 inch K frame and it is a J frame holster. I also changed the trigger to a .312 smooth combat trigger. A fun gun!!

Edit: Added photos of new .146 rear sight blade, pinned black ramp sight and whole gun with target stocks, Safariland holster. I had the holster for some time, as it was advertised for a 4 inch K frame and it is a J frame holster. I also changed the trigger to a .312 smooth combat trigger. A fun gun!!
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