Watch List notes:

Antoninus Pius Æ As. Rome (or mint in Britain?), AD 154-155. [ANTONINVS AVG PIVS P P TR P XVIII], laureate head right / [BRITANNIA COS IIII], Britannia seated left on rock, resting her head on her right hand, and resting her left on rock, round shield and vexillum in background. RIC 934; C 117; RCV 4296. 11.15g, 26mm, 11h.

Good Fine.

Ex Roma Numismatics Ltd., E-Sale 53, 7 February 2019, lot 749;
Ex inventory of a UK dealer.