IDRISID, 'ALI B. 'UMAR (fl. 252h). Dirham, al-'Aliya 252h. Obverse: In field: Allah | wali | 'alayhi. Reverse: In field: ﮞ o Y| Muhammad | rasul Allah | al-Muntasir billah | [unread] 'Ali billah. Weight: 1.73g. Reference: Eustache 437, same dies. Carefully struck on a well-prepared flan, almost extremely fine and extremely rare thus
(700-1000 GBP)