2025 World's Most Expensive Stamps - British Guiana 1 Cent Magenta Silver Proof Coin Royal Australian Mint accompanied by the words AUSTRALIAN

accompanied by the words AUSTRALIAN and CITIZENSHIP

butterflies

Only one known example survives today

the year-date and the monetary denomination

2025 World's Most Expensive Stamps - British Guiana 1 Cent Magenta Silver Proof Coin Royal Australian Mint accompanied by the words AUSTRALIANThe British Guiana 1 Cent Magenta stands as one of philately's greatest treasures. This legendary 1856 stamp exists in only one known example, instantly recognisable by its striking magenta hue, iconic sailing ship design, and the handwritten initials of the postal official who issued it. This silver proof coin captures that historic essence in precious metal form. It merges the prestige of owning a piece of stamp collecting history with masterful