10 Pounds 15th Hijrah Century, Aluminium Essai

Sudan's 1979 essai issues were produced in anticipation of a coinage reform tied to the Islamic calendar milestone of the 15th Hijri century — 1400 AH fell in November 1979. The Bank of Sudan commissioned trial pieces in multiple metals, aluminium among them, to evaluate designs before committing to production compositions. Aluminium was never selected for circulating currency at this denomination; these pieces exist purely as technical trials.

The dual KM reference reflects ongoing cataloguing ambiguity between Krause editions — the same piece has been listed under both numbers across printings.