Civilian production re-commenced in January 1919 with three models
emerging from Marston.
The 3½ h.p. was available as a 'Sporting' model which resembled the
1914 T.T. model, and a 'Standard' model based on the War Department
General Service (GS) model with its heavier chains and large diameter hubs.
An 8 h.p. JAP engined v-twin, similar to the last
JAP-engined military Sunbeam, was produced for heavy sidecar work.
*Robert Cordon Champ, 1980, 'The Sunbeam Motorcycle'. Haynes Publishing.
*John Marston Ltd., June 1919, Preliminary List: 'Sunbeam Motor Bicycles:
With Perfect Power Transmission'.