The Colt Model 1889 was a revolver produced by the Colt Manufacturing Company in the late 19th to the early 20th century.
In the mid 19th century, Colt manufactured revolvers for the Army and Navy that were based on a design by William Mason and Carl J. Ehbets. William Mason left Colt in 1882 to work for Winchester, but Ehbets remained at Colt, and continued to refine the design that they had collaborated on. These refinements led to the Model 1889.
Colt was the first manufacturer to produce a revolver with a swing-out cylinder. Smith & Wesson followed seven years later with the Hand Ejector, Model 1896 in .32 S&W Long caliber. This was an improvement over the Colt 1889 design since it used a combined center-pin and ejector rod to lock the cylinder in position. The 1889 did not use a center pin and the cylinder was prone to move out of alignment.
The Colt Model 1889 was the first double-action revolver with a swing-out c