Watch List notes:

Antoninus Pius. A.D. 138-161. AR denarius (17 mm, 3.62 g, 6 h). Rome, A.D. 155/6. ANTONINVS AVG PIVS P P IMP II, laureate head of Antoninus Pius right / TR POT XX COS IIII, Salus seated left, feeding from patera serpent arising from altar before her. RIC 254; BMC 859; RSC 982. Extremely fine. 

Ex Antiqua III (July 1996), 142.