This is a beautiful stamp souvenir sheet, issued by Guinea in 2009, commemorating the construction of the first Derrick construction lifting device. Also featured on the sheet are American oil driller Edwin Drake, Drake's Seneca Oil Company (Pennsylvania Rock Oil Company) in Titusville, Pennsylvania, American film actor James Dean, the Opel Ampera (Chevrolet Volt) plug-in hybrid electric car, the Amoco Cadiz Very Large Crude Carrier oil tanker ship, and a brief written history of the Derrick structure. The sheet is Post Office fresh, mint never hinged, and F/VF.