5542 x 1. Unique headlight knob screw, for the MK5 & XK120 Early models, which featured the Lucas 'Pillar design' headlight switch, designated as the Lucas S.37. Our specially tooled & chrome plated,  'Trumpet Head' Screw is unique to this rare chrome switch Lever / pointer type Knob, to secure it onto the bakelite upper pillar section. There is no seperate part reference for this very unusual and rare part.

NOTE : These early pillar switches rotate to lock into different angular positions to the later switches, so ensure you fit the correct escutcheon for your switch.

For the early chrome pointer / lever SEE : 5541