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, or are based on the troy ounce - for example, three ounces of silver (abbreviated as 3 oz Ag, where "Ag" comes from the Latin word for silver, Argentum).
This coin featuring Batman is part of an extensive New Zealand Mint series featuring DC Comics characters.
The Mint says about it:
A pop culture icon, Batman is regarded among the greatest Super Heroes ever created. He is known for his unparalleled intellect, determination and physical abilities.
Made of 3oz pure silver, the front of the coin features an engraving of Batman taking a strong stance. Behind is a montage of the hero, highlighting his history in comics. Engraved on the side is him launching into action, along with his notable Bat Emblem and a mirror finish background. The back bears the Ian Rank-Broadley effigy of Her Majesty Queen Elizabeth II to confirm it is legal tender.
Created in partnership with Warner Bros. Consumer Products, dynamic illustrations of Batman surround the custom-designed box. Inside, the coin is tucked in velvet and encased in an acrylic capsule for extra protection. A Certificate of Authenticity is printed on the box, along with the coin’s specifications and its unique serial number in the limited mintage of 1,000. | 
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