Arab- Sasanian, Ispahbadids of Tabaristan, Umar ibn al-Ala, Silver Drachma, 2.04g, Tpurstan Mint, Obv: Sasanian-style bust wearing winged crown; Arabic legend Umar to right, Rev: Fire altar with attendants, mint signature (TPURSTAN) to right (MAC1381). Extremely fine, scarce.