accettare profondamente poscritto black on magenta stamp Walter Cunningham Atticus distorsione
Lot 61130 - 1856, 4c black on magenta, cut octagonally with large margins, initialled "E.D.W", with very neat Berbice double circle ds | Autumn Auction Series 2022 | David Feldman SA David Feldman SA
The British Guiana 1856 One-Cent Black on Magenta stamp set a world record at Sotheby's New York, June 17, 2014 | Philip Chasen Antiques
Rare Stamps: British Guiana stamp (found by a schoolboy) sells for US $9.5 million | The Collectors' Shop
World's Most Valuable Postage Stamp Falls Short Of Anticipated Auction Record : NPR
British Guiana One-Cent Magenta | National Postal Museum
Sotheby's Will Offer the British Guiana One-Cent Black on Magenta and Other Tiny Rarities - Auction Daily
The Remarkable Story of the World's Rarest Stamp | At the Smithsonian| Smithsonian Magazine