Marcus Aurelius. AR denarius, 18mm; 3.38g. AD 170–171. 

M ANTONINVS AVG TR P XXV, laureate head right.
COS III, Salus, draped, standing right, feeding snake in arms.

RIC 234; BMCRE 539; RSC 140.

With permission of cngcoins.com, the AK Collection.