ISLAMIC, 'Abbasid Caliphate. temp. Al-Mansur, AH 136-158 / AD 754-775. Dirham (Silver, 26 mm, 2.90 g, 1 h), al-Basra, AH 144 = AD 761/2. Rev. 'S' below the inner reverse legend. SICA III, 562. Beautifully toned. Good very fine.
From a Swiss collection of Umayyad and Abbasid coins, assembled in the 1970-1980s (with original flip with S. Album's description).