What A Coin? (If A Coin)

I think that it's a good copy!

In the ancient Greek series, the "Hercules wearing Lion-skin head-dress" types are always silver coins. This coin is certainly not silver.

This particular coin design is copied from a small silver drachm of Tauric Chersonesus, an ancient Greek colony on the Crimean peninsula, on the outskirts of modern Sevastopol, Ukraine. In the case of your coin, the design has been stamped onto a copper blank much larger than the original silver coin was, which is why there's an unusually large amount of "empty space" around the central design on the reverse. The obverse is larger, and was probably taken from a tetradrachm of Alexander.