Caracalla. 198-217 AD. AR Denarius (3.51 gm). Struck 199-201 AD. 

ANTONINVS AVGVSTVS, laureate, draped, and cuirassed bust right, seen from the back.
SAL GEN HVM, Salus standing half-left, holding serpent-
wreathed sceptre and extending right hand to figure kneeling 
before her. 

RIC IV 42b; BMCRE 169 (Septimius and Caracalla)

With permission of cngcoins.com, the AK Collection.