Watch List notes:

ISLAMIC, 'Abbasid Caliphate. Al-Mahdi. Fals (Bronze, 18 mm, 1.88 g, 7 h), citing the caliph al-Mahdi 'al-Mahdi Muhammad ibn Amir al-Mu'minin' and the word 'baraka', al-Kufa, AH 164 = AD 780/1. Album 306. A rare date. Some deposits and scratches. Very fine.