Caracalla, AE17 of Topirus, Thrace. 

Obv: AVT M AV ANTWNEINO, laureate, draped and cuirassed bust right.
Rev: TOPIRITWN, Demeter or Hygeia, standing left, holding 
patera and serpent-entwined torch, at her feet a serpent
emerging from a cista mystica.

Varbanov 2686

Courtesy of Forvm Ancient Coins, webshop, April 2011.