Watch List notes:

Abbasid Caliphate, Umar ibn al-'Alā (771-782), Hemidrachm, Tabaristan, 776; AR (g 1,95; mm 23); Crowned Sasanian-style bust r.; behind, in Pahlavi, "May xvarrah increase"; before, in Pahlavi, "Umar ibn al-'Alā", Rv. Fire altar with attendants flanking; flanking flames, star and crescent. Malek 77.
Rare and lustrous, fdc.