The trademarks “Lucas” and the Diagonal Device are owned by Lucas Industries Limited
New Lucas Headlight 3-Position Toggle Switch. This switch is made by the O.E.M. manufacture – Lucas to replace part number 31788, 99-0563, 40-6683, 35710 and others. Features 3 positions. Fits Triumph 350 & 500 Unit Twins from 1968-1974. Fits Triumph 650 Unit Twins & T150 Triples from 1968-1970. Fits BSA A50 & A65 Twins from 1968-1970. Also fits many BSA unit singles & Norton Commando models from the late 1960’s though the early 1970’s. Please refer to your parts catalog for proper fitment.

*****Please note that this switch may fit various British sports cars – check your part numbers.*****

Lucas brand
O.E.M Part number is 31788, 99-0563, 34419, 40-6683 or 35710