25 Piastres

The Bank of Sudan's P#16 belongs to the second series issued after the 1978 currency reform that replaced the earlier Sudanese pound coinage system with a purely decimal structure. Thomas De La Rue's production of this note reflected a continuing colonial-era relationship — Sudan had relied on De La Rue for its currency printing from independence in 1956 onward, a dependency that persisted well into the 1980s despite the country's stated policy of economic self-determination under Nimeiry's government.

The 25 piastre denomination sat at an awkward purchasing level by 1981, already being eroded by inflation that would accelerate sharply through the decade.