100-500 USD
square
On the butt and inside the crane
Square
Your Smith and Wesson model 13-1 will have a 3in.Barrel if it is a round butt,or a 4in.Barrel if it is a square Butt model revolver.
Depends on when it was made.
The Model 15 is a "K" frame. This includes 15-1, 15-2 and 15-3. Be sure to keep your old grips, they increase reasale value a great deal. It is a K-frame square butt to be exact. They also made a round butt k-frame and those grips will not work on a square butt.
50-300 USD. 35 years old
If it is a 4" or longer barrel model, most likely it is a square butt (98 or 99% chance). If it is a 3" or 2.5" barrel model, it is almost certainly a round butt model. If you have any doubt, remove the grips and examine the back strap of the grip. If it curves inward at the base, making a smooth outline, it is a round butt. If you have any questions, contact me and I'd be happy to answer. I love this revolver.
You need to provide the number from the butt of the revolver. That is the sn.
$950-1100 Adjustable butt plate decreases value. No longer original stock.
Impossible to answer without the serial number. The serial number is on the butt.
On the butt