Antoninus Pius AE Sestertius, Salus reverse

Antoninus Pius (138-161 AD). AE Sestertius (29-30 mm, 23.30 g), Rome, 140-144 AD.
Obv. ANTONINVS AVG PIVS P P TR P COS III, Laureate head to right.
Rev. SALVS AVG / S - C, Salus standing left, holding rudder and patera, feeding serpent rising from altar to left.
RIC 636.

Almost very fine.