South Africa. 100 Rand, 2005 Choice Brilliant Proof. KM-425. Gold weight 1 ounce. For the Natura Series, The Hippopotamus. Housed in an ancient pottery clay case at the Mapungubwe world heritage site with leather engraved certificate of authencity, number 186 of 300 minted. Choice Brilliant Proof. Estimated Value $1,200 - 1,400