I am trying to find info on my old gun. It is a Smith&Wesson revolver that has no model # on it. I think it is a pre-model 10 M&P. It has a 5" barrel with high blade front sight & square cut rear sight. On the right side of the barrel it is stamped 38 S.&W. SPECIAL CTG.,on the left it has SMITH&WESSON, and on top it has the address and three patent dates of feb.6.06,sept.14.09,&dec.29.14. It has a finely checkered hammer and ejecter rod,grooved trigger,& a square grip with small inlayed S&W logo on each side.The grips are wooden with checkering and diamond in center where screw is located. There is no lanyard ring. The serial # is S 887459 and the numbers on the cylinder and back side of the grips all match. I am interested in the history of the pistol and any info would be appreciated.