May Brothers of 324 Clapham Road, London produced motorcycles between 1903 and 1906.
Little information is available, but this was probably a cycle business that became involved in the powered industry by fitting an engine to a heavy-duty bicycle frame. Engines would have been Minerva, MMC or Sarolea. Various other options would have been on offer as the machines were built to order.
See Also
Sources of Information
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