Septimius Severus AR Denarius 

Obv: L SEPT SEV PERT AVG IMP X, laureate head right

Rev:  SALVTI AVGG, Salus seated left, feeding a snake coiling up from an altar out of a patera; arm on side of throne, 

Sear 6363v;  RSC 641;  RIC 119a

With permission of cngcoins.com, AK Collection sale, 81.