According to Colt Archives serial number database, this Colt U.S. Army M1917 was made in 1920. MARKINGS: Butt frame "U.S./ ARMY/ MODEL/ 1917/ NO./ 145/ 627" (No. 132 587 is the official US Government number, the Colt factory serial number is marked on the crane); Under the barrel "UNITED STATES PROPERTY"; Left side of the barrel "COLT D.A. 45"; Top of the barrel "COLT'S PT FA MFG CO HARTFORD CT U.S.A./ PATD AUG 5, 1884, JUNE 5, 1900, JULY 4, 1906". SPECS: 5.5" Barrel, smooth walnut grips, lanyard ring, serrated hammer and 6-shot swing-out cylinder. COMES WITH: Embossed "US" brown leather flap holster marked "1917/ A.C.". CONDITION: This gun is in good condition with some various light wear, has a sharp/ clean bore and appears to be in good working order. HISTORY: The U.S. Army M1917 was manufactured by Colt and Smith & Wesson under contract with the U.S. War Department for use by the American Expeditionary Force in WWI. These six-shot, .45 ACP, large frame revolvers were adopted to supplement the standard issue M1911 pistol, and were produced from 1917-1920. The revolver saw prolific use by the "Doughboys" during World War I with nearly two-thirds as many M1917s being issued and produced during the war as M1911s were. After World War I, they gained a strong following among officers. FREE SHIPPING & NO PROCESSING FEES.