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 famous movie characters.
This coin is part of a New Zealand Mint series dedicated to famous movies in the form of their original posters, and features Harry Potter and The Chamber of Secrets.
The Mint says about it:
"Commemorating the second film in the Harry Potter™ series, this officially licensed Harry Potter and the Chamber of Secrets™ movie poster coin is made from 99.9% pure silver. Both colour and engraving have been used to showcase this memorable poster on a unique rectangular-shaped coin, which features heroes Harry, Ron, Hermione and the delightful Dobby the House Elf! The movie name and Gryffindor emblem complete the poster design.
Made from a full 1oz of silver, the coin is placed in an innovative acrylic holder which frames it and allows for easy display. A Certificate of Authenticity comes with the packaging, which is also Harry Potter branded to complete the aesthetic. The certificate confirms the silver purity and the coin’s unique number in the mintage." | 
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