Bactria, Eucratides I, 170-145 BC. Tetradrachm; Bactria, Eucratides I, 170-145 BC; Tetradrachm, 16.17g. Bopearachchi-Serie 6, 29; Mitchiner-177, ee. Obv: Bust r. wearing crested helmet. Rx: Dioscuri on horseback r.; monogram in r. field. Late, realistic portrait of the aging king, probably from the last five years or so of his lengthy reign.. EF