Watch List notes:

AGHLABID: 'Abd Allah II, 902-903, AR ½ dirham (1.43g), NM, AH290, A-451D, struck from dies intended for the gold ¼ dinar, but at the correct weight for the silver half dirham, appears to be unpublished and of the highest rarity, VF, RRR.

Estimate: 260-350 USD