Caracalla, Rome mint,
Denarius (19 mm / 4.14 g), 205 AD.,
Obv.: ANTONINVS - PIVS AVG , laureate and draped bust of Caracalla right, seen from behind.
Rev.: PONTIF TR P - VIII COS II , Salus seated left, feeding serpent coiled around altar.
RIC IV, I, page 225, 82 , C. 422 , BMC 484 .