25 Ekuele

Equatorial Guinea's 1975 currency reform replaced the ekwele (sometimes rendered ekuele in Spanish orthography) following the country's break from the CFA franc zone in 1969 — one of the few post-independence African states to voluntarily exit that monetary arrangement. The Banco Popular, established under Macías Nguema's increasingly erratic government, was the issuing authority in name; by 1975 the actual economy had been so devastated by mass emigration, forced labor, and the collapse of the cocoa sector that meaningful circulation of any denomination was limited.

Thomas De La Rue's involvement is worth noting — they were printing for a regime that the UN had begun publicly criticizing for human rights atrocities by the mid-1970s.