Manufactured in 1900. American Express purchased about 1,200 of these revolvers. These American Express Company marked revolvers are more scarce than the Wells Fargo marked models and are highly sought after by collectors. The revolver is fitted with a 4 1/2 inch barrel in 38 Colt that has the ejector rod with a "bulls eye" head and the cylinder pin with the knurled cap on the end. The top of the barrel has the two-line address "COLT'S PT. F.A.MFG CO / HARTFORD CT. U.S.A." and the left side is marked "COLT D.A. 38". The left side of the frame has the three line, three patent dates followed by the circled Rampant Colt. The back strap is engraved in a script letter pattern "Am. Exp. Co. 551". The full matching serial number is located on the bottom of the frame, trigger guard and back strap, and the loading gate is stamped with the assembly number "502". It has the standard Colt hard rubber grips on the bird's head grip frame with the circled Rampant Colt at the top.