Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 134,712 pages of information and 213,790 images on early companies, their products and the people who designed and built them.
Simplex was a motorcycle produced from 1906 to 1908.
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