ISLAMIC, Persia (Pre-Seljuq). Saffarids. Tahir ibn Muhammad, AH 288-296 / AD 901-908. Dirham (Silver, 29 mm, 3.26 g, 4 h), citing Tahir ibn Muhammad and the vizier of the calip al-Muktafi, Al-Qasim ibn Ubayd Allah as Wali al-Dawla, Fars, AH 291 = AD 903/4. Album 1404. About extremely fine.

Wali al-Dawla ('Friend of the Dynasty' in Kufic) was a title given by the caliph al-Muktafi to his vizier Al-Qasim ibn Ubayd Allah, a descendant from the Banu Wahb, a family of Nestorian Christian origin. He only appears once on coins, which were struck in the year AH 291, just a few months before his death