Some items from this specific schematic: Clamp,headlamp Socket, Washer,lock, Bulb(12v60/55w,h4), Screw.
The twenty-two Gs850g 1983 (d) General Export (e01) Headlamp (e17, E21, E25, E34) component parts are all listed in this schematic.
The lowest price component in this Headlamp (e17, E21, E25, E34) parts-list fiche is the Screw.