100 Pounds - Elizabeth II Five Portraits

Tristan da Cunha, the most remote permanently inhabited island on Earth, issues coins through the British overseas territory administration but has no domestic coin-using economy — all currency business is conducted through St. Helena. The "Five Portraits" conceit marks the five definitive effigy designs used on British coinage since Elizabeth II's accession in 1952, from the Gillick portrait through to the fifth Jody Clark effigy introduced that same year.

The one-troy-ounce fine gold format places this squarely in the modern commemorative bullion category, produced for collector export rather than any pretense of circulation.