Watch List notes:

BUWAYHID, RUKN AL-DAWLA , Dinar, Isbahan 354h. Obverse: In margin, at 9 o'clock in tiny lettering, die-engraver's signature: 'amal al-Hasan b. Muhammad. Reverse: In field: Rukn al-dawla | Abu 'Ali | Buwayh within double circle with four annulets at cardinal points. Weight: 4.14g References: Treadwell Is354G (citing a single example). Good very fine and extremely rare. The engraver al-Hasan b. Muhammad, whose signature appears on this coin, produced dies for a several Buwayhid mints between the 330s and 360s. His career has been studied in detail by Luke Treadwell in Craftsmen and Coins: Signed Dies in the Iranian World (third to fifth centuries AH).
(800-1000 GBP)