Faustina II AE As. 

FAVSTINA AVGVSTA, draped bust right 
AVGVSTI PII FIL AVG S C, Salus seated left feeding snake 
coiled around altar. 

RIC 1391; Sear 4723.

With permission of CHS Basel Numismatics on muenzauktion.com
Selling for 59,99 EUR, March 2013.