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 have a Zodiac-inspired theme.
This coin is part of a series of oval-shaped Signs of Zodiac coins by the Czech Mint, and features Leo.
The Mint says about it:
The shape of the constellation of Leo is reminiscent of the king of animals - and not just any king. The lion shines in the sky as a reminder of the valiant Heracles and the first of his legendary twelve quests to hunt down the dangerous and invincible beast. In addition to the constellations, the Lions in human form are ruled by another celestial body - the Sun. Just as the brightest star is the centre of our solar system, also Lions tend to be the centre of attention. Like their animal namesakes, they are dominant creatures who want to win in all circumstances. They are sociable and charismatic, but can easily succumb to pride and arrogance.
The unusual oval-shaped coin bears a coloured depiction of a Lion on the reverse side. No photographs or computer graphics were used as the basis for the colouring - the author of the coin, Asamat Baltaev, DiS., created an original watercolour painting for it. | 
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