I recently aquired this S&W 22lr. revolver. I believe it to be a K-22 or a Model 17 (not sure which is proper name). It has a 6 in barrel and adjustable rear sight. Under the grips on the frame is the Ser# K 299xxx The grips are not diamond cut but I do believe them to be original for the gun, just due to the aging look and markings. It has 3 screws on the frame and 1 screw in front of the trigger guard. The #'s on the inside cylinder hinge are 1687. I'm looking for the age and worth of this gun so I can sound smart when someone asks me about it. It fired beautifully and flawlessly at the range. I got it from a friend who said it was his family for a long time. Thanks