This is a early production Colt Government Model semi-automatic pistol with the British proofs. During this time frame Colt was producing some of the best automatic pistols, with all of them exhibiting excellent fit and finish and fine tuned trigger pulls. The factory letter states this pistol was shipped April 15, 1915 to the London Armoury Company, in a shipment of 200 guns. The British proofs consist of the "Crown/CP" and "Crown/V" proofs on the chamber area of the barrel and then a single "Crown/V" proof on the left side of the slide above the Rampant Colt and then again on the left side of the frame below the thumb safety. The left side of the slide has the standard two line Colt address and Patent markings of; "PATENTED APR. 20. 1897. SEPT.9.1902/DEC19.1905.FEB14.1911.AUG 19.1913" and "COLT'S PT. F.A. MFG. CO. HARTFORD. CT. U.S.A." with the Rampant Colt behind the slide serrations. The right side of the slide is marked in front of and below the ejection port "COLT AUTOMATIC CALIBRE. 45". The right side of the frame is marked, "GOVERNMENT MODEL" over the "C" prefix serial number. This model has the diamond checkered walnut grips, early checkered type two thumb safety with the thick thumb piece, checkered slide release, short horn grip safety, wide Colt hammer with the checkered spur, flat main spring housing with lanyard loop on the bottom, and half-tone magazine also with the lanyard loop on the base plate.