1 Crown - Elizabeth II 90th Birthday, Royal Birth - Gold Plated

Tristan da Cunha, a British Overseas Territory in the South Atlantic with a permanent population of roughly 250 people, issues commemorative coinage through arrangements with the Royal Mint and private minting houses — coins that never meaningfully circulate on the island itself. This 2016 piece marks both Elizabeth II's 90th birthday and a royal birth, tying two separate events to a single issue, which was common practice among smaller territories producing collector-targeted output during the later years of her reign.

The gold plating over copper-nickel was a standard production method for budget commemoratives of this period, giving visual appeal at a fraction of the cost of solid precious metal.