Antoninus Pius with Marcus Aurelius as Caesar (138-161). AR Denarius (17mm, 3.36g). Rome, AD 139. ANTONINVS AVG PIVS P P, Laureate head of Antoninus Pius r. R/ AVRELIVS CAES AVG PII F COS DES, Bareheaded and draped bust of Marcus Aurelius r. RIC II 412b var. (Bust of Marcus Aurelius l.); RSC 3b. Rare, near VF