1894 10f Belgian Congo centre invert is One of the most famous issues of Belgian Congo. This is an extraordinarily rare Belgian stamp, of which only around five examples survived. Many specimens of this unique item have some faults. The Belgian Congo, green 10F with centre inverted is a truly beautiful stamp, which many collectors could idly gaze at as it seldom appears on the philatelic market. It was sold for $141,529 at David Feldman auction in 2011, setting the world record for the Belgian Congo.