GDR – CIRCA 1990: a stamp printed in GDR shows Kentrurosaurus, Stegosaurid Dinosaur, Extinct Animal, Natural History Museum of Berlin, Centenary, circa 1990
Postage stamp GDR 1990 Kentrurosaurus, Dinosaur, Extinct Animal
Greg Laden's Blog
GDR – CIRCA 1990: a stamp printed in GDR shows Kentrurosaurus, Stegosaurid Dinosaur, Extinct Animal, Natural History Museum of Berlin, Centenary, circa 1990
very good explanation