1 Crown - Elizabeth II HMS Belfast

HMS Belfast, launched in 1938, saw action at the Battle of North Cape in December 1943 — the engagement that sank the German battlecruiser Scharnhorst — and later provided naval gunfire support during the Normandy landings. She was saved from scrapping in 1967 through a private preservation campaign and has been moored on the Thames as a museum ship since 1971. Tristan da Cunha, a British Overseas Territory with a population under 300, issues commemorative crowns largely as a revenue mechanism; the islands have no meaningful commercial circulation.