That cracking all over the surface implies to me that it's a modern cast fake, and not a genuine coin.
I believe it is attempting to copy the Athena-and-bull silver coinage of the city of Thouroi.
Example on WIldwinds. It is, of course, not silver.
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