I am looking at a 5 screw K-22 6 inch barrel, blued, wood grips with the diamond cut and the medallion. The grips are the same as pictured in the Jinks book page 172, "125 years with Smith and Wesson". SN 142193. The box with it says K-22 Combat Masterpiece but there is no SN on the box, which is old and faded gold color??, very faded so not sure. I am not sure what I am looking at , maybe a Target model or maybe a Masterpiece. Any help is appreciated. Thanks.