The Plasteikopf (Rätikon Alps) is a summit in the north of the Schwarzhorn. The Plasteikopf forms with the Rappastein 2'222 m and Heubüal 1'936 m a mountain ridge between the Lawenatal valley in the west and the Valünatal valley in the east.
It shows most likely a biplane over the Plasteikopf, seen from the east.
The stamps were issued in the series "Planes over Liechtenstein Landscape".
Liechtenstein 1989, Plasteikopf.
The stamp was issued in the series "Definitive — Mountains".