The 8 3/4 is 46,6XX RM Reg #462, square notch

The 6 1/2 is 47,0XX RM Reg #500, King Sights, factory letter stated it came with fixed sight and was shipped to a police captain in Pennsylvania.

I just posted a Thread in the Lounge..What Happened to Gary Grbrecht? where I describe how I was bidding on the RM that was sold for 17K at a Jeff Faintich Auction back in 98. That was the first RM that made the jump into hyper space.

I also have a few other S&W's that should blow yer boyz dresses up...