Obv: cista mystica with serpent; all within ivy wreath
Rev: bow-case with serpents; snake-entwined staff to the right; monogram left; AΠ above; monogram & star above
Ref: Kleiner, Pergamum 25; Pinder 122
From a large and mostly undescribed mixed lot, Stacks Bowers, November 2013. I'd like a higher grade example but the toning on this one is lovely so it's a keeper.