Tetradrachm ΓOP, MΣ

Arados — the Phoenician island city now known as Arwad, off the Syrian coast — maintained its own civic era dating from 259 BC, making precise dating of its tetradrachm series unusually reliable. The ΓOP and MΣ designations are magistrate monograms identifying the officials responsible for this particular issue, a bureaucratic practice that allows modern scholars to sequence the Aradian series with a granularity rarely possible for Hellenistic civic coinages.

By 87–86 BC, Arados was navigating the collapse of Seleucid authority in the region, effectively functioning as an autonomous commercial port city.