I have a 13-2 with the CAI stamp under the cylinder release. The stamp is seriouly ugly, but the gun is in otherwise excellent condition, showing very little use and mechanically perfect. If I just look at the right side of the gun it looks great. I was surprised that the stocks are factory numbered to the gun. The stamp kills the value of the gun, but I didn't pay much for it. It's a great shooter and being a P&R model, represents (to me, at least) a time when quality still meant something.