This is a beautiful sheet of 4 stamps, issued by Guinea-Bissau in 2001, honoring former President of South Africa Nelson Mandela. Also featured on the stamps are the minerals plancheite, cuprite, fluorite, hausmannite, and skutterudite. 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: