10 Dollars - Charles III Happy Koala

Cook Islands has issued commemorative gold under its own authority since the 1970s, operating as a self-governing territory in free association with New Zealand — meaning these coins are legal tender under Cook Islands law but circulate nowhere. The "Happy Koala" belongs to a long-running series of small-format fractional gold pieces aimed squarely at the bullion gift market, where the low per-unit gold content keeps the entry price accessible.