Smith and Wesson Model 657 Revolver in .41 magnum with a 4 inch. This gun is coated with Black T, a military grade coating that was originally put to use on small arms by the Navy SEALS to meet their requirements for corrosion resistance. Included with the pistol are approximately 700 hard cast 215 gr bullets, 1 box of 240gr platinum tip and 2 boxes (a few minus I think) 175gr winchester silvertip factory ammo, Lee carbide reloading dies, and a wooden case that includes a cleaning rod and brush.
Here's a Pic of the rear of the cylinder. No real personal history with this piece. I picked it up after last deployment for a woods gun but ended up going in a different direction with that whole idea. I put less than a hundred rounds through it. The serial number is N452725.