Please post a bit more information: - what is the weight of the coin - what is the diameter of the coin - how did you get it? For easier identification, I've combined both pictures into one. The coin shows similarity with this one: https://www.coinshome.net/en/coin_d...essionid=0528727B8637FE5E8CC4C871B9BE5762.lb1
It may be fake. I found a similar one in the fakes section of the FORVM: https://www.forumancientcoins.com/fakes/displayimage.php?album=search&cat=0&pos=1 And another one: https://www.forumancientcoins.com/fakes/displayimage.php?album=search&cat=0&pos=41
When I click on the links, I see images of Sasanian coins. The OP is definitely Antoichos IV, based on the reverse inscription, but I have no opinion as to its authenticity.