3/32” serial numbers and Blackhawk “Flattop” barrel. Model: Old Model Blackhawk Serial Number: 1058 Year of Manufacture: 1968 Caliber.30 Carbine Action Type: Single Action Revolver with Side Loading-Gate Cylinder Markings: The left side of the barrel is marked “Sturm, Ruger & Co. SOLD FOR: $1,200 Make: Sturm, Ruger & Co.
