When this 1856 British Guiana One-Cent Magenta stamp goes under the hammer at Sotheby’s in New York on June 17, it is expected to attract a world record bid for a single stamp of up to $20 million (Dh73.4m). Courtesy Sotheby’s
When this 1856 British Guiana One-Cent Magenta stamp goes under the hammer at Sotheby’s in New York on June 17, it is expected to attract a world record bid for a single stamp of up to $20 million (DhShow more

Rare 1856 stamp up for auction at Sotheby’s