50 Pence - Elizabeth II Queen Mother

Tristan da Cunha, a British Overseas Territory in the South Atlantic with a permanent population of roughly 250 people, has no functioning retail economy — its commemorative coinage is produced entirely for the collector market. This piece marks the Queen Mother's 100th birthday, an occasion the British government celebrated with unusual intensity given her popularity across the Commonwealth.

The island's nearest neighbor is Saint Helena, nearly 2,500 kilometers away.