Image rights: wildwinds.com COMMODUS, co-Augustus, Denarius Commodus, as co-Augustus, AR Denarius, L COMMODVS AVG, laureate, draped and cuirassed bust of Commodus, facing right. / COS P P, Salus, personifying health, safety, and general welfare, seated left, holding a branch, with a snake at her feet. Struck 177-178 A.D., portraying Commodus, at about age 16, as co-Emperor, with a simplified obverse legend that emphasizes Commodus' new position as co-Emperor. RSC 67, RIC III (Marcus Aurelius) 655, BMC IV (Marcus Aurelius) 765, RCV 5635, (3.4 gm.).