Ptolemaic, Ptolemy VI . Didrachm; Ptolemaic, Ptolemy VI ; First reign, 180-164 BC, Didrachm, 6.53g. SNG Cop-550-562. Obv: Diademed head of Ptolemy I r., wearing aegis. Rx: Eagle standing l. on thunderbolt.Ptolemy VI struck many tetradrachms but very few didrachms. This coin is struck in high relief. EF