Marcus Aurelius AR denarius, AD 139-180. Rome. 19 mm, 3.38 g. Struck AD 161-180. 

M ANTONINVS AVG GERM SARM, laureate head right.
TR P XXXI IMP VIII COS III P P, Salus standing left, holding patera and sceptre, feeding serpent rising from altar.

RIC III 373; RSC 944; BMCRE 733. 

With permission of Leu Numismatik auction 17, Lot 2561, Aug 2021