The most expensive part in this assembly is the Lamp-tail.
A sample from the products for the Tail Lamp include: Washer,6.5x20x1.6, Screw-pan-cros, Body-comp-tail Lamp, Bulb 12v 21/5w.
twenty-one components are shown in this Zr400b1 1984 Europe Uk Fr It Wg Tail Lamp exploded diagram.