Wilkinson-Antoine motorcycles were produced from 1903 to 1905 by the Cadogan Garage in Chelsea, London.
These machines were exhibited at the 1903 Crystal Palace show and built using Belgian Antoine engines of 2¼ hp or 2¾ hp fitted into a loop frame. They had flat-belt drive to the rear wheel, the rear pulley also acted as a brake drum.
Source: Graces Guide