This Ruger manufactured third variation 9 1/2" long barrel is for the old model 3 screw Single Six single action revolver with an adjustable style rear sight and is in very good condition exhibiting a mixture of thinning original blue finish with a brown patina with the thinning from holster wear and honest use. The bore is bright and rates excellent.  (file photo)

Markings: This barrel has the later markings after the company became Incorporated: Sturm, Ruger & Co., Inc. / Southport, Conn. U.S.A.