It says the colt Commando was for all intents and purposes a official police chambered for the 38 special . 2, 4, and 6" barrels .It would be stamped "Colt Commando"on the barrel . approximately 50,000 manufactured between 1942-1945 for use in world war II. Value is $550 exc to $100 poor condition . Add 30% for the 2" barrel .