Watch List notes:

Antoninus Pius (138-161), Sestertius, Rome, AD 145-147; AE (g 25,57; mm 32; h 11); ANTONINVS AVG PIVS P P TR P, laureate head r., Rv. [COS] IIII, Salus standing l., feeding serpent arising from altar and holding rudder. RIC 761.
Green patina, somewhat tooled on reverse, otherwise about extremely fine.