The good news is that you seem to be right by type. The bad news is that both the ruler's name and the date are off flan. On the reverse, the mint name Dimashq is legible inside the star. The date, written out in words in the margin, is completely missing.
On the obverse, the words in large letters across the center are al-sultan al-malik. Not much help. The name Hajji should be in the lower section but alas it is missing. According to Balog, the upper section should read al-Mansur and on a couple of the coins at Zeno it does clearly. On yours and some of the others at Zeno, it's something different but exactly what I'm not certain. None are clear. Perhaps al-Mansur preceded by another word?
Regarding 1st or 2nd reign, Balog lists them under the 2nd (p. 246, #532 dated 791 and #533 dated 792). The absolute determiner would be the date. Frankly none of the coins have a legible date. Also, it seems that the laqab al-Mansur was adopted for the 2nd reign.
 On the Agora coin, the left image (obverse) is upside-down. On the op, the left image (reverse) should be rotated 120 degrees clockwise.
Edited by Kushanshah
01/21/2023 07:13 am