2000 Ekuele Masie Nguema Biyogo, trial

Masie Nguema Biyogo was the birth name of Francisco Macías Nguema, whose 1979 overthrow and execution by his own nephew — Teodoro Obiang Nguema Mbasogo — ended one of postcolonial Africa's most brutal dictatorships. This trial piece, struck in his name, predates that coup by roughly a year. Trial strikes for Equatorial Guinea from this period were typically produced by European minting houses contracted through intermediaries, as the country had no domestic minting infrastructure.

KM#E4 designates it as an essai rather than a circulating or commemorative issue intended for release.