50 Dollars - Elizabeth II Winston Churchill

This issue marks one of the earliest large-format silver strikes from Cook Islands, produced just four years after the territory gained self-governance in free association with New Zealand. Churchill had died in 1965, and commemorative coinage bearing his likeness proliferated throughout Commonwealth nations during the late 1960s and 1970s — Cook Islands was late to that wave but produced one of the heavier silver pieces in the series.

The .925 silver specification and substantial weight place this firmly in the collector-issue category; no circulating economy of roughly 20,000 people had practical use for a coin of this size.