The 1 Cent Magenta printed in 1856, is the world’s most valuable postage stamp. Earlier this year it came up for auction at Sotheby’s New York and was
British Guiana 1c magenta - Wikipedia
Sam's Stamp Shop
File:British guiana 1c magenta reconstitution.jpg - Wikipedia
The only known surviving British Guiana one-cent magenta stamp, said to be the world's most famous a
Auction wrecks hopes for world's priciest stamp – Punk Philatelist
Rare double die 1955 Lincoln penny sells for $1,400 - do you have one of 20,000 coins in your change?
British Guiana 1 cent Magenta
The story behind the One-Cent Magenta stamp worth $9.5M
The One Cent Magenta - Own a Piece of History, Showpiece