Watch List notes:

Antoninus Pius (138-161), Denarius, Rome, AD 148-149; AR (g 3,29; mm 19; h 12); ANTONINVS AVG - PIVS P P TR P XII, laureate head r., Rv. C - OS - II - II, Annona standing l., holding anchor and corn ears on modius. RIC 175; C 284.
Lustrous, high relief, about fdc.