I am seeking the approximate value of an antique Colt revolver that has been passed down through 3 generations. This pistol was given to my grandfather around the time of the Depression as payment for medical services. Subsequently handed down to my father who wrote to Colt to get the history. I now have the pistol and the letter from Colt. Per inquiry Colt Industries, Colt’s Inc. Firearms Division: Police Model 1862, a type made 1861 to 1873. Serial #3318, manufactured c. 1861. Five cylinder, 36 caliber. 3 1/2 inch barrel. Overall length 10".