Silver hemidrachm of governor Hani bin Hani (788-789 CE), 137 PYE/788 CE, Caliph Harun al-Rashid, Abbasid Governors of Tabaristan

Sassanian-style bust right, with winged crown surmounted by star and crescent, crescents with stars, Pehlavi words GDE 'pzwty (combined to mean roughly "may kingship increase", left of bust), governor's name Hani in arabic to the right, Pehlavi words NYKW ("Good" lower left) and APD ("Excellent" in lower right) // Fire altar with two attendants standing facing, crescents on their heads, mint name in Pehlavi (tpwlst'n for "Tabaristan") to the right, date written out in Pehlavi to the left (137 Post-Yazdegard Era = 788 CE). 23mm, 1.63 grams. Album #69; Malek 110; Numista #62845.

Coins are dated in the post-Yazdigerd era (PYE) calendar, PYE = AH - 34.