Watch List notes:

Antoninus Pius (138-161), Sestertius, Rome, AD 145-161; AE (g 27,74; mm 33; h 11); ANTONINVS - AVG PIVS P P TR P, laureate head r., Rv. Emperor in quadriga l., holding eagle-tipped sceptre; in ex. COS IIII / S C. RIC 767a; C 320.
Delightful green patina, extremely fine - good extremely fine.