Bronze As of Antoninus Pius
Antoninus Pius (A.D. 138-161), AE As. Struck A.D. 154-5. ANTONINVS AVG [PI]VS P P TR P XVIII, laureate head facing right, rev [BRI]TANNIA COS II[II / S C], Britannia seated left on a rock, resting her head on her hand, and leaning on the rock, a round shield and a vexillum on left, 8.65g, 6h (RIC 934; C 117; RCV 4296).
A little short of flan, about very fine.
Based on the quality of production, there has been much debate as to whether this issue was struck at Rome or perhaps at an unidentified British mint.