Watch List notes:

ISLAMIC, Arabia. Najahids. al-Mu'ayyad Najah, AH 412-452 / AD 1021-1060. 1/2 Dinar (Gold, 18 mm, 1.00 g, 12 h), citing al-Malik al-Mu'ayyad, Zabid. Very rare. Minor edge crack, otherwise, good very fine.