500 zimbabwe 10 billion banknotes 2008, p-85 circ bundle coa authentic trillion coins, bills, banknotes, cheques, devaluation, 2007,2006, reserve bank of zimbabwe. 500 pcs x 10 Billion Zimbabwe Banknote (aka Zim Bond). The note does not contain any security threads nor watermarks however it is equipped with a 3-mm gold-to-green OVI stripe with repeating RBZ to enhance its security features.