Watch List notes:

Revolutionary Period, dirham, Gharshistan 138h, of standard Umayyad type, obv., four pairs of annulets in margin, 2.69g (vide Bates, M.L., 'Khurasani Revolutionaries and al-Mahdi's Title,' Culture and Memory in Medieval Islam: Essays in Honor of Wilferd Madelung, London and New York, 2003, pp. 279-317, reporting 'perhaps two' examples in private hands), very fine and extremely rare (£10000-15000)