I have a set of the Dias 88 500th anniversary of his voyage around the South African coast. I only know they were made by the South African Mint (I think), and I'm hoping to find out more about them such as material they are made out of. I know they are not a very expensive set but any information would be greatly appreciated.


Let me know if I need to scan the other side of the coins, all of them simply have Dias 88 on them.
Thanks