Parts such as the Head Lamp: Washer, Plate 8067717800, Bulb, Head Lamp, Clamp (8y2), Clip are included in the Gpx338g 1975 Head Lamp parts fiche.
On this parts fiche the Washer, Plate 8067717800 is the most specified component.
The Head Lamp assembly is constructed from several parts from which the Body,headlight is the most expensive.