Antoninus Pius brass Dupondius, AD 145-161. Rome mint. 

Obv: ANTONINVS AVG PIVS PP TR P COS III, radiate head right. 
Rev: SALVS AVG, Salus standing left, holding patera and upright rudder, 
feeding a serpent rising from the altar.

RIC 809; Cohen 720.

With permission of TimeLine Auctions (www.timelineauctions.com), February, 2017