This is a beautiful stamp souvenir sheet, issued by Guinea in 2011, honoring Presidents of the United States of America. Featured on the sheet include the 33rd President of the United States Harry S. Truman, United States Army General & Deputy Chief of Staff Thomas T. Handy, American theoretical physicist J. Robert Oppenheimer, and the Enola Gay Boeing B-29 Superfortress bomber aircraft, among others. The sheet is Michel #8257 / Bl.1923, and is Post Office fresh, mint never hinged, and F/VF.