5 Dollars - Elizabeth II Posthumous, Key to my Kingdom

Cook Islands has issued commemorative silver dollars under licensing arrangements for decades, with the "Key to my Kingdom" falling into a broad category of themed fantasy issues produced primarily for the collector market rather than any circulation purpose. These pieces are struck by external minting partners — typically European facilities — under Cook Islands' authority, which has made the territory one of the most prolific small-nation issuers in modern numismatics.

The posthumous attribution places this issue after September 2022. Cook Islands moved quickly to produce Elizabeth II memorial and tribute coinage in the months following her death, as did dozens of issuing authorities worldwide.