Africa.   Egypt, Ptolemaic Kingdom.   Ptolemy III Euergetes (246-222 BC).     AE Dichalkon. Alexandreia mint. Struck c. 245-222 BC.   Obv.    Diademed head of Zeus-Ammon right.        Rev.   Eagle standing left on thunderbolt, wings closed; cornucopiae to left; XP monogram between legs.     Svoronos 970; SNG Cop. 185-187.     3.10 g.   15.50 mm.        Nice dark olive green patina, earthen highlights.    EF.