The Model 1877 was Colt's first attempt at manufacturing a double-action revolver and its early double-action mechanism proved to be both intricate and delicate. Originally called the New Double Action Self-Cocking Central Fire Six Shot Revolver, the Model 1877 was designed by Colt's well-known employee, William Mason, who also designed the famed Single Action Army Model of 1873. The 1877 has a three-position hammer with safety, half-cock, and full cock notches. Other attributes include a cylinder pin mounted through the center of the frame, a loading gate mounted on the frame, and a rod ejector mounted on the barrel. Its signal rear-offset "birds head" grip which gives the revolver a very distinctive look. This 1881-manufactured revolver features a nickel-finished frame, rubber grips, an etched barrel, and fixed sights. Its grips, its metal, and its bore are in good condition.