Tetrachalkon Keryneia

The Achaean League's bronze coinage reflects the confederation's unusual political structure — a federal state issuing currency on behalf of member cities, with Keryneia functioning as one of the smaller mints within that system. The League's monetary authority was consolidated enough that individual city identities were subordinated to federal types, a arrangement that distinguished Achaean coinage from most Greek civic issues of the period.

The terminus in 146 BC was not gradual. Rome dissolved the League by force following the sack of Corinth, ending both the confederation and its coinage abruptly.