The David Plant Collection, 1925 Sunbeam Model 3/4 Project (see text) Registration no. not registered Frame no. 17900 Engine no. 245/16243/S Gearbox no. BT8616 Already established as makers of high-quality bicycles, the Wolverhampton-based firm of John Marston Ltd 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 famous 77x105.5mm 492cc 'Longstroke' that secured a debut win at the 1921 French Grand Prix in the hands of Alec Bennett. In road-going form this remarkable engine remained in production right up until WW2. Manufactured under a variety of model names, the Longstroke had gained drum brakes by the mid-1920s. At time of cataloguing it had not been possible positively to identify this Sunbeam, though we are advised by The Marston Sunbeam Club and Register that it is either a 1925 Model 3 or 4 based on the frame number. The machine is offered as an incomplete restoration project and is sold strictly as viewed. Condition and completeness unknown, Prospective purchasers should satisfy themselves with regard to this motorcycle's completeness, history, authenticity, originality and mechanical condition prior to bidding. Footnotes: BUYER'S PREMIUM The Buyer's Premium for this Lot is 28%+VAT on the first £40k of the Hammer Price, then 27%+VAT up to £800k, then 21%+VAT up to £4.5M and 14.5%+VAT thereafter. All lots are sold 'as is/where is' and Bidders must satisfy themselves as to the provenance, condition, age, completeness and originality prior to bidding. CONDITIONS OF SALE, AUCTION INFORMATION & GUIDE FOR BUYERS Please see the 'CONDITIONS OF SALE, AUCTION INFORMATION & GUIDE FOR BUYERS' at the top of the main sale page (Motorcycles Online - The Summer Sale) for all pertinent information regarding bidder's obligations, viewing, bidding, payment, post-sale collection & transportation. REQUEST A TRANSPORT QUOTE To request a UK or European Motorcycle shipping quote visit Moving Motorcycles. To request an International Motorcycle shipping quote visit Shippio. To request a Memorabilia and Spares shipping quote visit Mail Boxes Etc - Milton Keynes. Lot to be sold without reserve. For further information on this lot please visit Bonhams.com For further information about this lot please visit the lot listing