Caliber is 45-70, serial number is 1050, barrel length is 8". This is the Model 100 and one of the largest hand guns ever manufactured. These were manufactured beginning in 1973 in Evansville Indiana. They were manufactured through 1999. Production at Evansville ended at serial number 524. This is a Keller continuation with the sand cast bronze frame and blue barrel and cylinder. This gun has seen some use, cylinder blue has high edge wear and is starting to thin and has a drag line. The barrel shows light muzzle wear. Grips are excellent. Bore and action are perfect. Has adjustable rear site and front site. It is a six shot single action. Very interesting revolver. Serial Number-1050; Manufacturer-Century; Model-100; Caliber-45-70; Barrel Length-8"; FFL Status-Modern;