Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,957 pages of information and 228,875 images on early companies, their products and the people who designed and built them.
Planet were motorcycles produced circa 1919 to 1920.
This short-lived make made a failed attempt to exploit the post-war market. They used the 269cc Villiers engine, plus various sizes from Union and Blackburne. The rest of the machines were built from whatever components were available at the time and were typical of the period.
The British Motorcycle Directory - Over 1,100 Marques from 1888 - by Roy Bacon and Ken Hallworth. Pub: The Crowood Press 2004 ISBN 1 86126 674 X