Tahirids. Talha b. Tahir. AH 207-213 / AD 822–828. AR Dirham (25mm, 2.99 g, 3h). Madinat Samarqand mint. Dated AH 208 (AD 823/4). Citing al-Ma'mun as Khalifat Allah and with governor's name Talha in reverse field. Wilkes, Coinage 30; Album 1393. Good VF.