Arab Sassanians, Abbasid, Governors of Tabaristan (750-1258 AD), Silver 1/2 Drachma, Obv: crowned and cuirassed bust of the king facing right, marginal Arabic legend, four crescents with a star flanking the margin, Rev: fire altar flanked by attendants, marginal Arabic legend, four crescents with a star flanking on margin, triple-dot to the right of it each, a beaded border around, 2.04g, 22.82mm, XF-AUNC, Rare.