Lucas pattern headlamp lighting switch, short arm - type U39M, includes locking wire. A new reproduction Lucas pattern headlamp lighting switch - with short arm. Bakelite with settings OFF, L, H. For Lucas headlamps models DU42, DU142, MU42, MU142, SSU700s from 1930? to late 50s for bikes with magneto ignition. This goes in the headlamp or petrol tank lighting panel. Suits most machines from 1936 to 1955. Original Part Numbers: 351551 - switch - lighting (assembly)
