'Abbasid caliphs
al-Mutawakkil 'alâ llâh, 232-247 H./847-861 AD. Dinar on small and thick flan 247 H., Samarqand, 3rd type with the name of the prince al-Mu'tazz billâh below obv. field and the caliph below the rev. field. Allan p. 196; Qatar 1198; Bernardi 0423Qe. 4.22 g.; Very rare About extremely fine
Acqu. Baldwin's, London, Islamic Coins Auctions 5, November 2002, lot no. 109.
The purpose of al-Mutawakkil and his sons issuing small flan dirhams and dinars alongside ordinary size coins is not fully understood so far. They are mostly concentrating on the metropolitan mint and generally rarer than ordinary size, except for the year 247 H.