Watch List notes:

Abbasid, temp. al-Mahdi (158-169h), fals, al-Yamama 167h, rev., in field: al-Khalifa al-Mahdi | Muhammad | Amir al-Mu'minin | Hajjar, 2.36g (cf Morton & Eden auction 82, 20 October 2016, lot 26), fine to good fine and very rare