This Colt Officer's Model Target Revolver was sold to the King Gun Sight Company in San Francisco, California. It was shipped to the Powell & Clement Company in Cincinnati, Ohio on February 25th, 1938 in a single gun shipment. It was on Colt Factory Order #10133/1.
The D.W. King Gun Sight Company started in the fall of 1928. They were based out of San Francisco, California. They would initially start by making aftermarket sights for Winchester and Smith & Wesson. It would be years later that they would start making sights for Colt. In 1945 D.W. King passed and his widow hired a new manager who alienated a number of key employees. Some left to go on and start the Micro Sight Co. which would eventually end up with a patent infringement lawsuit.
During the King Gun Sight Company's was in business, the company made a variety of aftermarket upgrades nearly all of Colt's Pistol's and Revolvers at the time. This included fixed and adjustable sights, balancing weights, hammers and grips. They also offered a wide variety of gunsmith services alongside the parts. Due to the complex and precise nature of the majority of these parts, King needed to be the company installing these parts directly.