I saw that you've posted it a couple of weeks ago. It's definitely not a coin, I'd say maybe it's a weight. The letters in the incuse are ΠT, maybe OΠT? I don't know what that means, but it's in greek so that narrows thing down a bit. I found some byzantine weights that are looking vaguely similar, but nothing close, so I didn't post them. These are not close examples at all and I'm not sure if your weight is even Byzantine, so I don't want to send you to the wrong direction. - https://journals.openedition.org/anatoliaantiqua/383#tocfrom3n7