ISLAMIC, 'Abbasid Caliphate. temp. Al-Mansur, AH 136-158 / AD 754-775. Fals (Bronze, 20 mm, 2.00 g, 4 h), Madinat al-Salam, AH 155 = AD 771/2. Album 307.1. Very rare. Flan crack, otherwise, very fine.
Abbasid fulus from Madinat al-Salam are generally rare, but the AH 155 issue is by far the rarest .