Beautifully preserved pergamon cystophore.
The reverse is slightly off-centered, but fully legible and very clear.
Greece, Mysia
Pergamon, Cistophoric Tetradrachm circa 180-133 BC
Obverse: serpent emerging from cista mystica, the whole within wreath
Reverse: two serpents standing by decorated bow case, ΠA and monogram above, monogram of ΠΕΡΓ to left, staff of Asklepios to right
Weight 12.29 g