It is a
drachm from Babylon, but it's an Alexander
drachm (the
inscription reads "Of
King Alexander" not "Of
King Philip). It can be attributed as
Price 3693, c. 323-317 BC (a
posthumous issue minted shortly after Alexander's death). There are subtle
side issues here. The coin was minted under the authority of Philip III, Alexander's dimwhitted/mentally retarded half brother, but it's not a coin minted in
his name, so numismatically it's considered a
posthumous Alexander issue. Also,
Martin Price put Babylon in quotation marks with this coin, as he did with most of the coins he attributed to Babylon, indicating that while he believed these coins were minted there, there's less certainty about this than with some other coins he attributed to other mints.
Still, you're on safe ground describing this as a
posthumous Alexander the Great coins minted in Babylon c. 323-317 BC,
Price 3693.
