Triassarion ΧΙΩΝ

Chios operated under the Roman conventus system headquartered at Pergamum, which grouped Aegean island communities together for judicial and administrative purposes without stripping them of the right to strike local bronze. The triassarion denomination — worth three asses in the provincial tariff system — was the workhorse of everyday exchange in the eastern Aegean during the Trajanic and Hadrianic periods, when Rome actively encouraged civic coinage as a tool of local self-administration.

The ΧΙΩΝ ethnic inscription places this firmly within the island's autonomous civic issues rather than the koinon coinage of the broader Ionian league.