Julius Caesar Supremacy. Tetradrachm; Julius Caesar Supremacy; Year 4=46/45 BC, Tetradrachm, 15.63g. RPC-4128. Obv: Head of Philip Philadelphus r. Rx: Zeus seated l, ? in ex. Anonymous in the name of Philip Philadelphus, dated by an era beginning with Caesar's defeat of Pompey in the battle of Pharsalus.. MS