It is an ancient Judaean coin, dating from the Maccabean period before the time of Christ. I'm not an expert in the series, but it's something like
these examples on Wildwinds of king Yehonatan (John Hyracanus II, 67-40 BC).
The coin appears genuine, but has been damaged by the bezel housing it.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis