Stater

Kyzikos held a near-monopoly on electrum coinage in the Greek world for roughly two centuries, and the city's staters functioned as an international trade currency across the Black Sea and Aegean networks — accepted far beyond Mysian territory precisely because the city guaranteed a consistent alloy. The natural electrum sourced from regional deposits gave each issue a slightly variable gold-to-silver ratio, which Kyzikene merchants understood and foreign traders simply trusted.

Production ceased abruptly when Alexander's conquests flooded the eastern Mediterranean with Macedonian gold, collapsing demand for the old regional trading currencies almost overnight.