Lucas pattern headlamp lighting switch - long arm - type U39M. A new reproduction Lucas pattern headlamp lighting switch - with LONG arm. Bakelite with settings OFF, L, H. For Lucas headlamps models DU42, DU142, MU42, MU142, SSU700s with magneto ignition from 1930? to late 50s. This goes in the headlamp or petrol tank lighting panel, where the switch is located near the edge of the panel or where the switch is not flush with the surround, which is many lights.
Original Part Numbers: 351551 - switch - lighting (assembly)