This is the Super Rare Smith & Wesson Perfected Target Pistol . This is the third model in the blue finish with 10″ barrel and Walnut extended Grips.
This model will fire double action as well as single. The serial number range was 4618-11641 continued from the second model with 6949 manufactured from 1909-1923.
This is one of the finest 22 single target guns ever made. The gun comes with very little wear mainly just on the muzzle end of the barrel. I would ask you to look at the pics.