Manufactured in the mid-1870s from a mixture of remaining percussion parts on hand and newly fabricated components, and the method of factory alteration was the same as in the Richards-Mason Model 1860 Army. These revolvers are found in the 1-3800 serial number range with this example having an early three digit serial number, "372." It has the one-line New York barrel address, "COLTS/PATENT" (factory double stamped) on the frame, naval cylinder scene and "36 CAL" on the trigger guard shoulder. Matching numbers are found on the barrel, frame, trigger guard, back strap and cylinder.