The original posters gun looks like a 29-5 of 1993 vintage. I'm pretty sure if you look under the top strap, you will see 3 factory holes that are drilled and tapped for a scope mount. 1993 appears to be a transition year of sorts for N-frame "Classics". They have a long round tang rear sight that is secured by a #4? screw, but also have the three hole pattern that is drilled and tapped for a 6-48 screw. In 1994, Smith changed to the shorter round tang rear sight which is attached to the top strap by the forward most screw of the new 3 hole pattern. In 1993, you also had the Hogue grips with that silver medallion insert on the N-frame Classics. Those changed to the current all rubber Hogues in 1994. Don't lose that rear sight. I've heard that Smith no longer has these available.