Ephesos Civic Coinage Cistophoric Tetradrachm. Year 66 (69/68 BC). 

Obv: Cista mystica with half-open lid, from which a serpent issues, all 
within ivy wreath
Rev: Two coiled serpents with heads erect, ear of corn between two crossed cornucopiae above, race torch in right field; year mark XC 
above EFE to left. 

BMC 170; cf Sear 4399 (field marks and year).

Courtesy of TimeLine Originals (www.time-lines.co.uk), Nov. 2010