⅙ 'Sudaysi' Dirham - al-Radi

Al-Radi, who reigned from 934 to 940, was the last Abbasid caliph to compose poetry, deliver his own Friday sermons, and exercise anything resembling genuine political authority — after him, the office became ceremonial window dressing for whatever military strongman held Baghdad. The sudaysi, a sixth-dirham fraction, circulated in a monetary environment where the full dirham had debased so severely over the preceding century that small silver fractions were a practical necessity rather than a convenience.