Introduced in 1913, the Mark I was designed with an eye for military sales, firing a semi-rimmed variant of the British 455 service cartridge. Fixed Patridge blade front and windage adjustable rear sights with Birmingham proofs on top of the barrel and slide and the Webley "winged bullet" logo on the left side of the slide ahead of "WEBLEY & SCOTT Ltd/PISTOL SELF-LOADING .455 MARK I". Fitted with a matching numbered grip safety, serrated ring hammer, lanyard swivel and a pair of checkered grips.

Very fine with 85% plus of the original blue finish showing a few patches of brown patina, bright edge wear and some light handling marks overall. The grips are very fine with a few scratches and dings. The hold-open needs adjustment, as it does not engage, otherwise mechanically fine.