S&W 357 magnum 1950? era value?
I am looking for assistance in identifying the model and value of this S&W 357.
Possibly model 27 or 29. Six shot revolverIt has a 3 inch barrel, wood checkered grip, blued finish. On the butt the serial# is S 138xxx. 3 screws on the side, one on trigger guard and 3 on the grip, and 2 on the top with the site . Smith and Wesson trademark on handles in silver and engraved on below trigger. Engraving of " Made in USA, marcus registrdas, smith&wesson, springfield, mass.
Thanks in advance for any input you could offer.