The Colt Official Police in .38 Special with 4-inch barrel, the standard police service revolver of American law enforcement from the late 1920s through the 1960s. The benchmark American duty revolver of its era. Type: Revolver Action: Double-Action Caliber: .38 Special Capacity: 6 Year introduced: 1927, USA Weight: 36 oz Overall length: 9" Status: Discontinued Intended use: Law Enforcement, Military, Collecting, service, collecting