25 Dollars - Elizabeth II Queen Mother

Queen Elizabeth The Queen Mother died in March 2002 at the age of 101, making her the longest-lived British royal consort in recorded history. Cook Islands has issued commemorative silver in her honor across multiple decades, typically timed to royal anniversaries rather than her death date — the 2022 issue most likely marks the centenary of her 1923 marriage to the Duke of York, later George VI.

At 155.53 grams, the flan is a standard five-troy-ounce casting, a format that became nearly ubiquitous in Pacific island commemorative programs after the mid-2000s when sovereign mints began licensing the format aggressively to small-nation issuers.