The Cook Islands, a sovereign state in free association with New Zealand, uses two official legal tender currencies. The New Zealand Dollar circulates in parallel with the local Cook Islands Dollar; at the same time, the government also authorises many legal tender coins in the Cook Islands Dollar currency for collector's purposes.
Collector coins are dedicated to historical or general popular culture themes not related to the country itself. Many of them are in standard bullion sizes, including the large two ounces of silver format - such as this coin.
The Mint says about this coin:
Our previous Black Proof issues that featured an Anchor and an Airplane Propeller were immensely successful and both were sold out issues. The third issue features a classic car that will bring you back to the days of highway cruising. This amazing coin called "open roads - open hearts" could translate to “open possibilities” of the enhanced smartminting technology.
Have a closer look on this 2 oz numismatic piece of art to identify four different finishes on just one coin. Proof finish, black silk elements, frosted areas and the overall black proof appearance is minting on the highest sophistication level. The chrome accents and stylish curves will bring you back to the days when cars were works of art. Like the cars, there won’t be many of these to go around. Only 999 will be struck. A smaller gold coin featuring the same theme is released alongside the larger silver version. | 
Search for Cook Islands: Silver Two Ounces 2021 Classic Car - Open Roads on eBay 