20 Dollars - Charles III Thunder Dragon

The Thunder Dragon is Bhutan's national symbol and the country's Dzongkha name — Druk Yul — translates directly as "Land of the Thunder Dragon." Cook Islands has operated one of the world's most prolific commemorative coin programs since the 1970s, licensing its currency authority to overseas mints and distributors while the islands themselves run almost entirely on New Zealand dollars in daily commerce.

The 93.3g specification places this squarely in the 3 oz silver format favored by the modern collector bullion market.