Lot 255: Sunbeam 3½hp

Already established as makers of high-quality bicycles, the firm of John Marston Ltd, of Wolverhampton, introduced the first Sunbeam motorcycle, a 350cc sidevalve single, in 1912. The marque quickly established a reputation for sporting prowess, achieving second place in the 1914 Isle of Man Senior TT and winning the 1920 race. Overhead-valve engines were introduced in the mid-1920s but early successes were achieved with sidevalve machines, most notably the 492cc 'long-stroke' that secured a debut win at the 1921 French Grand Prix. In road-going form this engine remained in production right up until WW2. A 1923-season model featuring the new belt-rim brakes and sliding pinion gearbox, this Sunbeam 'flat tanker' is offered for restoration. The machine retains its original registration number and has been stored for at least the last 15 years. It is described as in original condition by the vendor, who advises us that he hopes to have it running by time of sale. The machine is offered with old-style logbook and Swansea V5 registration document.