There are still many "gun folks" who do not know the value of those three letters ("REG") in the yoke of a .357 Magnum. Another case in point - about 12 years ago on GB, I stumbled into a "Smith & Wesson Model 3261 with Bone grips" for $900 buy it now from a Las Vegas gun shop that specialized in tactical weapons.
It looked like this when I quickly pushed the buy it now button after a quick call to confirm that there was a "REG" in front of the "model number".
As it turns out, it shipped to King Gun Sight Company, had a cockeyed trigger added, and was drilled and tapped for a guard mounted trigger stop. Oh... and the "bone grips" are ivory...

Over the years, I rounded up a box, had a friend with a box of King sights change out the front sight, added the screw for the trigger stop, and added a set of KB Kearsarge Stocks. This is how it looks now:
Best deal I ever got on a Registered Magnum and it is one of my favorite pre-war 357 shooters (it also made a trip back to the factory somewhere in its history as is evidenced by the star on the butt).
I sure hope the OP posts some more info about and photos of the RM he traded into.
