R50 BIG 5 BUFFALO 1OZ GOLD PROOF
As per the SA Mint website:
The reverse of the coin features two halves of the face of the Cape buffalo and when two coins are placed next to each other a complete close-up image of the face is seen. When multiple coins are placed next to each other, a herd of buffalos is formed.
Metal Content: Au 999.9
Limited Edition: 500