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 the New Zealand Mint's Guards Of The Empire coin series dedicated to characters from the Star Wars films.
The Mint says about it:
"The Empire’s elite shock troops, the Stormtroopers™, are naturally the first to feature in the officially licensed Guards of the Empire Silver Coin Collection. This coloured and engraved coin features a Stormtrooper with his blaster rifle in front of a horde of the infamous “bucketheads”.
The design is completed with an antique finish. Made from 1 oz of fine silver, this striking rectangular collectible is packaged in an innovative acrylic holder, which frames the coin and lets you display it easily. A uniquely numbered Certificate of Authenticity is included which, along with the outer box, is Star Wars branded and complements the overall design." | 
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