Nineteen rare pieces of "pirate treasure" are going under the hammer in October along with a collection of coins and stamps worth $2 million.
The pieces of eight are described as classic pirate treasure coins and will be up for auction along with more than 200 other coins on October 14 in Wellington.
The 8 reale coins of the Spanish Empire became known as Spanish Dollars and were ultimately the ancestors of New Zealand's present dollar coins, said auction house Mowbray Collectables.
Valued at around $200 each, the roughly struck pieces of silver were produced in the world's largest silver mine at Potosi in Bolivia.
They show the Spanish coat of arms on one side and the "Pillars of Hercules" - the rocks on either side of the Straits of Gibraltar - over waves on the other side.