This 80-centime Swiss stamp, issued in 1988, commemorates the 150th anniversary of the National Topographic Survey (1838–1988). Designed by Beni La Roche and printed by Courvoisier, the stamp features a stylized grid map of Switzerland, a surveying theodolite, and a triangle representing triangulation—all key elements of land surveying. The trilingual inscription highlights Switzerland's multilingual heritage with German, French, and Italian. A must-have for collectors of thematic geography or Swiss commemoratives.