The Washer,lock is the lowest priced item on this Headlamp (e21) schematic.
This Bulb(12v35/35w) is the most expensive of the items that make up this Headlamp (e21) assembly.
With all the components that make up the GT200E 1981 (X) (E01 E02 E06 E07 E09 E13 E21 E22 E24) HEADLAMP (E21) assembly. The Spring,head Lamp Unit is the most frequently specified with three applications.