5 Ekueles Annobón island

Annobón — a volcanic island of roughly 5,000 inhabitants sitting 350 kilometers southwest of São Tomé — was administered by Spain until 1968 and briefly declared its own independent republic in 1972 before being forcibly reintegrated into Equatorial Guinea under Macías Nguema. Its appearance on a 2013 circulation coinage issue is a pointed political gesture: the island has historically resisted Malabo's authority, and naming a denomination after it functions as an assertion of territorial unity that the population there has not always accepted.