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 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 - such as a half ounce of gold (abbreviated as 1/2 oz Au, where "Au" comes from the Latin word for gold, Aurum).
This coin, commemorating the Prague Uprising of 1945, was issued as part of a four-coin gold proof set by the Czech Mint.
The Mint says about the coin:
Since the beginning of 1945 a nationwide uprising was being prepared in the Protectorate of Bohemia and Moravia, in order to liberate the nation, once and for all, from German domination. Due to other European events, which indicated the approaching end of the Second World War, this rebellion should have helped to prevent the Germans from looting or destroying our industrial potential. The Prague uprising burst out 5th May, 1945. Nearly three thousand victims form part of the list of the fallen, which was completed this year by the Military Historical Institute, 70 years later.