Watch List notes:

Abbasid, al-Ma'mun (194-218h), Dirham, Madinat Arran 211h, citing 'Abd al-A'la b. Ahmad and 'Ubayd Allah b. Yahya, 2.77g (Vardanyan -; Lowick 846; A 223.8). Once cleaned but now beginning to re-tone, very fine and very rare.

Estimate: £300-400