Coin of Antiochus VI. The reverse shows Castor and Polydeuces on horseback. The Greek inscription reads ΒΑΣΙΛΕΩΣ ΑΝΤΙΟΧΟΥ (king Antiochus). The date ΘΞΡ is 169 of the Seleucid era, corresponding to 144–143 BC.
Antiochus VI did not actually rule. He was nominated in 145 BC by the general Diodotus Tryphon as heir to the throne in opposition to Demetrius II, and remained the general's tool. In 142 BC, Diodotus deposed and succeeded him and in 138 BC announced that he had contracted an internal disease and supposedly required surgery, which was presumably used to cover his murder at his supposed benefactor's bequest.