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.
Some coins are marketed in standard bullion sizes, like half ounce silver, one ounce silver etc, and some of those are also denominated as $1, for which see respective lists. This coin, denominated as One Niue Dollar, is not in a standard ounce-based size and is made using a "smartminting" technique - meaning that it has features not generally found in circulation coins.
The Mint says about this coin:
In our day-to-day life it is easy not to notice the fascinating world around us. However, we share our planet with really peculiar animal species! One of them, the emperor tamarin, is a small reddish-grey monkey standing out with its amazing looks. Our silver commemorative coin, opening the intriguing series "Amazing Animals", is devoted to this adorable little creature.
The emperor tamarin is an arboreal primate occurring in South America. Thanks to its bizarre, humorous-looking white moustache the animal was compared to the German Emperor and King of Prussia Wilhelm II (to whom it allegedly bore remarkable resemblance). Hence the name of the species the "emperor" tamarin. | 
Search for Niue: One Dollar Silver 2015 Emperor Tamarin on eBay 
