Introduced as a brilliant mass-production masterpiece that successfully democratized British motorcycling, the 1925 Triumph Model P represents a vital, legendary chapter in Coventry engineering history. Developed to succeed the veteran-era Model H, this first-year "P" variant features its factory-correct, air-cooled 494 cc side-valve single-cylinder engine—proudly stamped with its highly sought-after, early-production "A1 0655" engine code. This mechanical setup drives a hand-shifted three-speed Triumph gearbox via a modern, robust all-chain drive system, completely doing away with the vulnerable rear-hub belt drives of earlier pioneers. Riding on a sturdy black rigid frame accented by Triumph's signature open-spring front forks and a classic cream flat tank with iconic green stripes, this beautiful pre-war single offers an incredibly pure, highly authentic vintage experience. For the serious collector of early British iron, this impeccably styled, milestone Model P stands as a crowning centrepiece of early 20th-century transportation. Stamped, "Triumph", with CSA on the engine.