Æ21 - Valerian and Gallienus ΚΙΑΝΩΝ

Cius, a port city on the Propontis, had a long habit of issuing bronze coinage under Roman authority that emphasized local civic identity rather than imperial flattery. The joint reign of Valerian and Gallienus — ended violently when Valerian was captured by Shapur I at the Battle of Edessa in 260, the only Roman emperor ever taken prisoner in the field — makes precise dating within this window consequential. Coins issued after 260 would have dropped Valerian's name from civic bronzes across the eastern provinces.

The ΚΙΑΝΩΝ ethnic confirms civic issue, not imperial mint production.