This is a beautiful 4 stamp sheet, issued by Central Africa in 2012, and featuring early fast trains and their inventors Richard Trevithick (1771 - 1833), Timothy Hackworth (1786 - 1850), John Ericsson (1803 - 1889), and Robert Stephenson (1803 - 1859). The sheet is Post Office fresh, mint never hinged, and F/VF. Click here to visit my eBay Store for other auctions and Direct Sale items: