Depends on when it was made.
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.
round
Need the serial number.
Smith and Wesson Model No. 2
Sorry, I can not help you with the serial number, but if you tell me the model or if there is no model on it the caliber and barrel length and if the butt is round or square I think I can tell you.
If someone has made one.
Many different models have been chambered for this round.
The frame size of a Smith and Wesson model 66 is K.
.25 -2.00 USD a round.
No such model listed in the Standard Catalog of Smith and Wesson. You will need to call the factory.
The Smith and Wesson model 19-5 was made from 1982-1985.