1 Dollar - Elizabeth II Treaty of Rome: Germany

Issued to mark the 50th anniversary of the Treaty of Rome, which in March 1957 established the European Economic Community among six founding nations including West Germany. Cook Islands became a prolific producer of commemorative bullion in the 2000s, leveraging its status as a New Zealand realm territory to issue legal tender with minimal domestic circulation pressure. At 0.5 grams of five-nines fine gold, these pieces contain fractionally more pure gold than a standard .9999 issue of equivalent weight — a specification that was a minor marketing distinction at the time of issue.