Manufactured in 1856 and almost certainly seen use during the Civil War. After the war, it was returned to Colt and converted for use with .38 centerfire ammunition for the U.S. Navy using the Richards-Mason system. The top of the barrel has the one-line New York City address, and the bottom has "R. W. M. [anchor]." markings of Commander Richard W. Meade of the U.S. Navy. An additional "U S N." mark is found on the butt. The frame has the two-line 1871 and 1872 patent marking and traces of the original "COLT/PATENT/US" marking. The matching full serial number is on the major parts aside from the cylinder which is numbered "4060" on the side and "12" and "61" on the rear face. The grip has "C. B." in large letters carved and filled in on the right side. "628" is marked on the loading gate.