Greco-Baktrian Kingdom. Diodotos I Soter (ca. 255-235 BC). AR tetradrachm (25mm, 16.44g). In the name of Seleukid King Antiochos II. Mint A (near Aï Khanoum). Diademed head r. / Zeus advancing l., brandishing thunderbolt and with aegis over outstretched arm; in lower l. field, monogram above eagle. Holt Series A, Group 6; Bopearachchi 2E; SNG ANS 77; HGC 9, 244.