Marcus Aurelius, AE dupondius, 170-171 AD, Rome.

M ANTONINVS AVG TR P XXV, radiate head right.
SALVTI AVG COS III, Salus standing left, holding patera over 
serpent-entwined altar, S-C across fields.

RIC 1010; Cohen 117.

Dane's collection, Aug. 2012.
I know it's grotty but I couldn't find another example to use.