Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. al-Mansur. AH 136-158 / AD 754-775. Æ Fals (24mm, 4.55 g, 12h). Chinese cash type. Sijistan mint. Date not visible, but struck AH 151 (AD 768). Album 335; ICV 509. Fine, dark brown patina, broken. Extremely rare.