Watch List notes:

ISLAMIC, 'Abbasid Caliphate. Uncertain period. Fals (Bronze, 20 mm, 2.30 g, 11 h), citing the Abbasid governor Ahmad ibn Musa, probably Tarsus in Cilicia, circa AH 240-330 = AD 850-940. Album 300. An attractive example of this difficult issue. Minor cleaning scratches, otherwise, very fine.