Watch List notes:

ISLAMIC, 'Abbasid Caliphate. temp. Al-Saffah, AH 132-136 / AD 749-754. Fals (Bronze, 19 mm, 1.56 g, 9 h), citing the governor Yahya ibn Muhammad, al-Mawsil, without date, circa AH 133 = AD 151. Album 193. Very rare. The obverse struck somewhat off center, otherwise, very fine.