NB5821A Smith & Wesson N Frame Model 58 4" Barrel Used Part .41 Magnum k13u check these two things:

check these two things:

Stainless steel cylinder assembly with new-style fluting

which includes the Model 64 (

Trigger Specifications

Model numbers were added starting in 1957–58

NB5821A Smith & Wesson N Frame Model 58 4" Barrel Used Part .41 Magnum k13u check these two things:NB5821A Smith & Wesson Revolver N Frame Model 58 Double Action Blue Steel 4" (Pinned) Barrel Assembly Used . 41 Magnum We sale used, new & new old stock Smith & Wesson double action revolver parts. Shoot us an email or give us a call for all your S&W Gun needs! USA Guns and Gear How to determine the model number of your Smith & Wesson Revolver. Swing out the cylinder , check behind the yoke on the frame for a MODEL NUMBER. Model numbers began in 1957