Drachm

Chalkis sat at the narrow strait between Euboia and the Boeotian mainland — a crossing so strategically valuable that control of it effectively meant control of central Greek maritime traffic. This issue falls squarely within the period following Philip II's victory at Chaironeia in 338 BC, which dissolved the autonomy of most Greek poleis and brought Chalkis under Macedonian influence. That the city continued striking its own silver through this period reflects the administrative tolerance Macedonia extended to compliant coastal cities whose harbors it needed.

The weight standard here is Euboic, which had long anchored Athenian coinage before Athens shifted practices in the fifth century.