ISLAMIC, 'Abbasid Caliphate. Al-Mahdi, AH 158-169 / AD 775-785. Fals (Bronze, 20 mm, 2.87 g, 2 h), citing al-Mahdi and the minister of finance Nusayr, Madinat al-Salam, AH 166 = AH 782/3. Album 307.1. Some areas of weakness, otherwise, about very fine.
From a Swiss collection of Umayyad and Abbasid coins, assembled in the 1970-1980s (with original flip with S. Album's description).