Here's mine. My best guess is 2nd century B.C.E. but I haven't been able to attribute it. Any suggestions would be very welcome.
I suggest I give your coin a little hug. To me, it looks so sweet and in need of one. Seriously, I loved looking at all these super ancient coins. I was wondering whether @TIF had some of these "bottle tops;" and if so, what might she have selected for inclusion in her collection?
I don't have any. There was one in an unimaged mixed lot but I sold it last year. There are several I'd like to have but other coins have taken priority. Someday
Here are a couple of serrated Seleucid coins of Antiochus IV: Laureate head of Apollo / Apollo seated on omphalos, & Diademed, radiate head of Antiochus / veiled and draped standing goddess holding long scepter