Originally developed in an attempt to get a "land service" contract, the Mark I No.2 pistol is associated with the Royal Horse Artillery units it was destined for, with some also attributed to the Royal Air Service as observer weapons or last-ditch personal defense tools in the days before the machine gun became the weapon of choice for air warfare. While never really intended for commercial sale, a very limited number are known to have been made, typically with minor variations in which features were included. An identified range of ten pistols (123300-123309) is known to have been made with all three signature features (adjustable rear sight, hammer-mounted manual safety, stock slot), making this an extremely rare handgun. Fitted with a blade front sight, with the left side of the slide bearing the Webley "flying bullet" logo and "WEBLEY & SCOTT Ltd/PISTOL SELF-LOADING 455 MARK I No2/1915"; it has been noted that the "1915" on RHA Webleys is something of a vestigial marking not corresponding to the actual production date, with the full-feature commercial RHAs noted as made in about 1919. The rear sight is a spring-loaded drum assembly with a checkered control button on the right side and graduations for 50, 100, 150 and 200 yards on the left. The bright hammer is fitted with a blued safety lever; when engaged, the lever exposes an engraved "SAFE" marking on the hammer and bears against a specially shaped contact surface on the matching numbered grip safety to block the hammer. The grips are finely checkered, with the right panel covering the full grip frame and the left shortened to make space for the stock mounting groove. A lanyard ring is present on the rear. The correct pattern replacement stock is fine hardwood construction with a blued steel mounting iron bearing "broad arrow" military proofs and a number "5".