This attractive DDR (East Germany) pair highlights the nation’s scientific emphasis on meteorology and atmospheric observation during the Cold War era. The 10 Pfennig stamp commemorates 75 years of the Potsdam Main Meteorological Observatory, featuring a precision astronomical-meteorological instrument set against a bold modernist backdrop. The 25 Pfennig issue marks World Meteorological Day (23.3.1968), symbolically combining wheat, weather symbols, and sunlight—reflecting the vital link between climate science and agriculture. Both stamps showcase strong graphic design typical of late-1960s DDR issues and are popular among collectors of science, meteorology, and socialist-era thematic philately.