Pergamon, Mysia. AR Cistophoric Tetradrachm AR, 12.11 gr, 27.69 mm. 190-133 BC.

Obv: Cista mystica with half-open lid, from which a serpent 
issues, all within ivy wreath.
Rev: Two coiled serpents with heads erect, between them a 
bow case, ornamented with an aplustre, containing a strung 
bow, in field to right a serpent-entwined staff; PER 
monogram to left, Delta I and GRY monogram above.

Mionnet S5, 850; BMC 106; cf Sear 3947-3950 (field marks).

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