Tetradrachm - Euthydemos I

Euthydemus I seized the Baktrian throne from the Diodotid dynasty sometime around 230–225 BC, and his legitimacy was immediately contested. When Antiochus III marched east on his great anabasis, he besieged Euthydemus at Bactra for two years — a siege that ultimately failed. The subsequent peace, negotiated around 206 BC, was remarkable: Antiochus recognized Euthydemus as a legitimate king, reportedly persuaded by the argument that Euthydemus had not himself rebelled against the Seleucids and that a weakened Baktria would only invite nomadic incursion from the steppe.

The tetradrachms struck across this long reign show subtle die progression, with the Bopearachchi 9A variety among the later emissions.