Ptolemaic, Ptolemy I. Tetradrachm; Ptolemaic, Ptolemy I; 305-283 BC, Alexandria, c. 306-300 BC, Tetradrachm, 15.64g. CPE-69. Obv: Head of Alexander III r., wearing elephant-skin headdress and aegis. Rx: Athena attacking r. holding spear and shield, A?E?AN?PoY upwards behind her, before her helmet, XA monogram, and eagle standing on thunderbolt.. EF