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London Machinist's Co of High Street, Kingsland, London
Royal Sovereign were motorcycles produced between 1903 and 1904.
1903 An extended frame was used, fitted with a 2¼ hp Minerva engine. The frame had members running either side of the crankcase on the crankshaft line, curved down-tubes and curved seat-tubes. This primitive machine also had rigid forks and belt drive.
1904 A 3hp forecar was available and this was also listed as a tricycle. The make was very short lived.