An extensively redesigned flat twin replaced Douglas's earlier models in 1955. Known as the Dragonfly, the newcomer featured a revised engine with stronger crankcase, single carburettor, alternator electrics and coil ignition. The duplex swinging-arm frame employed conventional Girling dampers in place of the preceding torsion bar set-up, while the old Radiadraulic front fork was dropped in favour of an Earles-type leading-link arrangement. The large headlamp nacelle extending back to the five-gallon fuel tank was a distinctive feature, though one of dubious practical merit as the light unit did not turn with the handlebars. Together with the 1949 Douglas MkIII in the sale, this example was painstakingly restored by Nottingham-based engineer, Colin Lowther and after completion featured in the September 1982 edition of Classic Bike magazine. Still in wonderful condition, the machine has been maintained in working order by the current owner and is offered with Republic of Ireland registration document.