Douglas, 1926, Refined Geometry. The Douglas Engineering Company, formed in Bristol by brothers William and Edward in 1882, was at first a blacksmith's shop but soon expanded to become an iron foundry. After the turn of the century and the advent of the motor vehicle, it soon became involved in the development of engines and was especially renowned for horizontally opposed twin-cylinder bikes and as a manufacturer of furious speedway machines. There were no less than five incarnations of Douglas throughout its somewhat bumpy history; despite this, Douglas enjoyed competitive success and helped establish the flat twin as a practical engine layout for motorcycles. This configuration lowered the centre of gravity and provided a smooth delivery of the power. The attractive external fly wheel was also a signature mark which, when lightly struck, produced a wonderfully clear and consistent note. The final model, the Dragonfly, still a horizontally opposed twin, was announced in 1954 with production finally ending in 1957. Well campaigned by the vendor, this excellent 1926 Douglas is in good running order. See also Lots 329, 330 for spare parts for this motorcycle.