“Mona Lisa of the Stamp World” To Be Auctioned

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But now a 1-cent postage stamp is set to become the most expensive in the world. The unremarkable-looking 1856 British Guiana 1-cent Magenta is set to sell for an amazing £12million at auction. It is described by experts as the Mona Lisa of the stamp world and hasn’t been displayed publicly since 1986