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 DC Comics characters and themes, and features Superman's Shield with the logo of Superman.
The Mint says about it:
"This 1oz pure silver coin celebrates Superman, the most powerful hero in the world. The coin has been shaped to resemble Superman's iconic “S” shield. The “S” has been defined with a pop of red enamel and the mirror finish ensures the silver catches the light.
The Ian Rank-Broadley effigy of Her Majesty Queen Elizabeth II features on the obverse and confirms it as a legal tender coin. The mintage has been set at 5,000 coins worldwide. A unique serial number on the Certificate of Authenticity, placed inside the packaging, confirms each coin as part of this limited edition. The 1oz silver coin is nestled inside in a high-quality, black coin case. This case arrives inside a dramatic, matching box printed with further images of the “S” shield in a gold colour." | 
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