Manufactured in 1876, the barrel is marked with the standard two-line address on top, "COLT NEW 41" in an etched panel on the left, and the patent date on the bottom. The matching serial number is on the left of the grip frame, bottom of the barrel, and partial ("508") on the rear face of the cylinder. The left of the frame is marked "41CAL C". It has standard features and is fitted with a pair of smooth walnut grips.