Marcus Aurelius (161-180) AR Denarius (Silver, 2.79g, 17mm) Rome, 169-170.
Obv: M ANTONINVS AVG-TR P XXIIII, laureate head of Marcus Aurelius right
Rev: SALVTI-AVG COS III, Salus standing facing, head left, feeding serpent rising from altar, at feet to left, from patera in right hand, grounded scepter in left.
Ref: RIC III 222.