First off, please pardon my ignorance. I'm afraid I know nothing about old Smith & Wessons. I bought this from a relative who knew nothing about it. It is a 6 shot, hand ejector, Caliber .32 WCF, 4" Barrel, SN 62551. There is no number on the crane. I believe it is a 5 screw since it has a screw on the front of the trigger guard. The last patent date listed on the barrel is Sept 14, 09. I'd love to know the age of this revolver.Thank you in advance for your help. Please let me know if any further information is needed. Below is a link to a poor phone camera picture.