According to factory records (copy included), this Official Police was part of a group of three revolvers shipped to the King Gun Sight Company of San Francisco, California on November 29, 1940. Significant upgrades were performed by King including the installation of a Colt-King Super Target rail with an interchangeable Patridge front blade, mirrored front sight illuminator, an adjustable square notch rear sight, an extra wide checkered trigger, and a right handed asymmetrical hammer spur. Markings are standard and it has a pair of checkered Colt medallion grips.