Bactria, Antimachus, 180-170 BC. Tetradrachm; Bactria, Antimachus, 180-170 BC; Tetradrachm, 15.83g. Bopearachchi-Serie 1D. Obv: Diademed and draped bust of king r., wearing kausia. Rx: Poseidon, standing facing, holding trident and palm, monogram in r. field.Pit in obverse field at 2 o\'clock. VF / Fine