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 made using "smartminting" techniques and have features not generally found in circulation coins - e.g. high relief, full colour printing and/or different forms, including fully three dimensional (3D).
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 particular coin denominated as One Niue Dollar is not in a standard ounce-based size.
This coin is part of a Mint of Poland series featuring the Chinese Lunar Calendar and is dedicated to the 2016 Year of the Monkey.
The mint says about it:
The Tree of Luck is a well-known symbol of affluence, nobility and wealth. It is said to bring new opportunities, enhance auspicious energy and protect its owner from money loss. According to the Chinese zodiac, the Year of the Monkey begins on 8 February 2016 and ends on 27 January 2017. The silver coin "Monkey Tree" shows a traditional graphical representation of a Chinese zodiac sign. | 
Search for Niue: One Dollar Silver 2016 Monkey Tree on eBay 
