Depends on when it was made.
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.
Need the serial number.
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.
round
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.
If someone has made one.
Many different models have been chambered for this round.
That would have been made in the early 1970's. $250-$350
.25 -2.00 USD a round.
Yes, i own a model 28 chp
it is possible,but my research shows that your Smith and Wesson model 586 was made in the year 1989.Smith and Wesson did not delete the square butt on the model 586 until 1995-1996.If you could tell me which variation of the model 586 you have(586-1,586-2 etc.) I could pinpoint the year of production,and any possible limited production models for that year.