Coin: Tetradrachm, Syria?

This Greek coin is a silver Tetradrachm. It is unknown exactly where it is from, but most likely from Syria as it is a coin of Antiochos I and was struck during his reign. The coin was struck in the early to mid-3rd century BCE. The obverse is a profile of Antiochos I, the son of one of Alexander the Great’s generals. The reverse is Apollo, Greek god of many things, including music and light, sitting on an omphalos, a religious stone artifact. To the right of Apollo are the letters ΒΑΣΙΛΕΩΣ (Beta Alpha Sigma Lambda Epsilon Omega Sigma) the Greek word for King. To the left of Apollo are the letters ANTIOXOY (Alpha Nu Tau Iota Omicron Chi Omicron Upsilon) for Antiochos.