Antoninus Pius AE Sestertius. 140-144 AD. 

ANTONINVS AVG PIVS P P TR P COS III, laureate head right.
SALVS PVBLICA S-C, Salus standing left, holding sceptre and 
patera, feeding serpent rising from altar. 

RIC 639; Cohen 737.

With permission of Numismatica Ars Classica, 2008.