This is a First Model commercial Colt .44 centerfire Richards Conversion revolver (that has been refurbished in the 20th Century). The revolver has the Richard's modifications: (1) recoil shield with Richard's breech plate, rebounding fire pin, integral rear sight and loading gate, (2) six-notch cylinder, (3) plugged loading rammer hole with plug secured by a screw on the left side of the barrel lug and barrel to accept the Richard's ejector assembly. The top of the barrel is marked: "-ADDRESS COL. SAML COLT NEW-YORK U.S. AMERICA-" and the left side of the frame is stamped "COLTS/PATENT". No other markings. The rear of the loading gate is marked "2066". The entire gun has been nickel plated except for the wedge, hammer, trigger and screws which are blue. The serial number "3102" is located on the frame, barrel lug, trigger guard and backstrap. All visible serial numbers match.