Rare silver Afzut hemidrachm with "Bakh Bakh", 134 PYE/785 CE, Caliph al-Mahdi, Abbasid Governors of Tabaristan

Sassanian-style bust right, wearing winged crown surmounted by star and crescent, crescents with stars, Pehlavi words GDH (combined to mean roughly "may kingship increase", left of bust), AFZWT ("Strong" right of bust), Bakh Bakh (in arabic, "very good" in 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 (134 Post-Yazdegard Era = 785 CE). 23mm, 1.81 grams. Album #73a; Walker, Arab-Sasanian, p. 154, 302; Numista #111428.

This is the rare type with "Bakh Bakh" ("very good" or "excellent" in arabic) replacing NYKW ("Good") in the lower left. This type is known only for some coins dated to 134 and 135 PYE. It is quite rare, rated "Rare" in Album.

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