Watch List notes:

ABBASID: al-Muqtadir, 908-932, AR dirham (5.92g), Antakiya, AH320, A-249, Zeno-126969 (this piece), citing the vizier 'Amid al-Dawla, VF, RR. Almost exactly the weight for a double dirham (5.94g), which may have been the intention for this piece.

Estimate: 300-400 USD