I have a 4"+ 686 No Dash with the CS Stamp indicating it is one of the Custom Serivices guns. It has an adjustable rear sight. The serial number is AWPXXX on the frame. Below the serial nimber is Mod 686 in very small letters and numbers.
On the crane is stamped:
D 2
25x56
I would be curious to know what the D2, and the 25x56 stands for if anything. The gun cost me an arm and a leg because of it`s barrel length 105.14mm. Just .14MM over the minimum barrel length for handguns up here.
Take care
Bob