This souvenir sheet commemorates the Centenary of Naval Aviation in the British Antarctic Territory. The sheet features multi-color stamps that depict the history of naval aviation in the area. Minted in 2009, these stamps have never been hinged and are of Mint Never Hinged/MNH quality. The sheet is a perfect addition to any stamp collection and is a great way to celebrate the history of naval aviation in the British Antarctic Territory. Please refer to the attached photograph for the grade of the stamps. The sheet is uncertified and was manufactured in Antarctica.