These are both from Tabaristan. They are 1/2 dirhems based on the Sasanian standard, and should weigh around 2 grams each.
The coin on the left is from the anonymous Abzud issues. Abzud means to increase. It is combined with the word GDH to the left of the crown to mean "may his splendour increase. Your coin is from PYE 134 (169 AH) when Tabaristan was under the rule of the 'Abbasid governors. Your coin is listed as number 158.5 in Hodge Malek's The Dabuyid Ispahbads and Early 'Abbasid Governors of Tabaristan: History and Numismatics
. I am not certain about the reading of the date, but your coin matches the breast ornament and shoulder ornaments for 158.5. It also has the star to the left of the altar and what I think is a crescent to the right of the altar as 158.5 has.
You second coin is a post-Khurshid coin with the date of PYE 115 (149 AH). This is after the death of Khurshid, the last of the Dabuyid Ispahbads. It is number 52, in Malek's book.
In PYE 115, the 'Abbasid governor was most likely Khalid b. Barmak, who most likely stopped the Posthumous
Khurshid coins. Since Khalid b. Barmak stopped the issue of this coin, it might have been issued by the privious governor Rawh b. Hatim.
In PYE 134, it is not certain who was the 'Abbasid governor. The governor could have been Muqatil or Jarir, or neither of them.