25 Pounds 15th Hijrah Century, Aluminium Essai

Issued to mark the beginning of the 15th Islamic century — 1400 AH fell in November 1979 — this aluminium essai was part of a broader series of pattern strikes produced for the occasion rather than for circulation. Sudan's coin program in this period relied heavily on outside minting houses, and essais like this one were typically submitted for approval or struck in limited numbers as presentation pieces. The aluminium composition confirms its trial nature; no circulating denomination of this type was produced in this metal.