Abbasid, al-Musta'sim (640-656h), Dinar, no mintname, 655h, 8.57g (A 275 var.). Creased, reverse double-struck, margins mostly flat (but date clear), otherwise very fine, of the highest rarity.
ex Spink Taisei Zürich Auction 34, 19 June 1990, lot 109
This coin is believed to be the only known example of a fourth period Abbasid dinar without a mintname. It may have been struck by a travelling army mint during the campaign against the invading Mongols.
Estimate: £2,000-2,500