Pergamum Nice CISTOPHORIC TETRADRACHM, Mysia US $88.00 Aug-30-04 Seller amphoracoins Pergamum, Mysia, 133-67 BC, silver cistopohoric tetradrachm of 26.9 mm, 12.26 grams. Obverse: Cista mystica partly opened, snake emerges. Reverse: Two snakes intertwined with a snake-entwined torch at right. Reference: BMC 122.