A 1-cent postage stamp from a 19th century British colony in South America has become the world's most valuable stamp - again. Sotheby's says the 1856 British Guiana One-Cent Magenta sold Tuesday at ...
Obverse Image: Bust of Columbus. Obverse Text: WORLD'S COLUMBIAN EXPOSITION / CHICAGO / 1492 / 1892 / COLUMBUS Reverse Image: One-cent postage stamp glued onto medal in rectangular frame.