Niue, a sovereign state in free association with New Zealand, uses two official legal tender currencies. The New Zealand Dollar is the circulation currency for daily transactions, while the government also authorises legal tender coins in the Niue Dollar currency for collector's purposes.
A number of mints issue a large variety of commemorative, bullion and collector coins under the authority of Niue. These coins are dedicated to historical or general popular culture themes not related to Niue itself. Many of them are in standard bullion sizes - typically, one ounce of silver (abbreviated as 1 oz Ag, where "Ag" comes from the Latin word for silver, Argentum). Many of these feature characters and themes from popular culture.
This coloured silver ounce coin was issued as part of a four-coin themed set, and features the famous pirate Bartholomew Roberts.
The Mint says about it:
"Have you ever seen the real Caribbean pirates? Now you’ve got the exceptional possibility to own a set of .999 silver proof coins each bearing the most famous pirates of the Caribbean. Most of the pirates of the classic piracy era (1700-1730s) in the Caribbean were of English, Dutch and French origin.
The obverse of each of the four Niue coins carries the effigy of Her Majesty Elizabeth II surrounded by the inscriptions denoting the Queen’s name, the face value of the silver coin and the name of the issuing country. The year of issue is also indicated at the bottom of the pirate coins.
The reverse design of the silver coins features the colored images of Caribbean pirates Edward Teach or Blackbeard, Calico Jack Rackham, Henry Avery and Bartholomew Roberts. The images are supplemented with two outstanding pirate symbols: two swords and a skull with crossbones.
Piracy was known to flourish in the Caribbean because of the existence of pirate seaports such as Port Royal in Jamaica, Tortuga in Haiti, and Nassau in the Bahamas." | 
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