New Here, Need Help With ID Of This Drachm

I am new on this forum and also new in collecting Ancient Greek (and Byzantine) coins. I got this drachm that was sold as a drachm from Cappadocia, however when I saw it I knew it had to be a Seleukid coin.

Now my question is can someone help me ID this drachm to its specific king?

This is the coin:


The weight is 3.6mm and a diameter of 17mm.
It got a "Phi" monogram at the bottom.

I tried to find similar seleukid drachms with this monogram and I found the following:

1. An extremely rare Antiochos, son of Seleukos IV, 175-170 BC drachm


2. Seleukos IV drachm


However I do think Antiochos is written on the coin I have.

3. Antiochos III drachm


These 3 coins almost all look identical to my coin, the Seleukos coin has almost an identical obverse but I think the name on the reverse is not the same as mine:



I would appreciate it a lot if someone can help me ID my coin.

Thank you!