The London 1980 International Stamp Exhibition British PO First Miniature Sheet features a stamp from the Decimal (1971-2022) era of Great Britain during the reign of Queen Elizabeth II. This Royal Mail stamp is denominated as 53 1/2p and is of Mint Never Hinged (MNH) quality. It was issued to commemorate the international stamp exhibition held in London in 1980 and is a valuable collectible for stamp enthusiasts and historians alike.