Bronze as, 25mm, 11.75gm, issued AD 154/155. Rome mint.
Obv: ANTONINVS AVG PIVS PP TRP XVIII, Laureate head facing right.
Rev: BRITA[NNIA COS] IIII (SC in ex.), Britannia seated to left on rock, to left shield and sceptre.
Dark toning, rare.
The Antonine Wall was built to enclose areas beyond Hadrian's Wall that were captured in Antoninus' reign. Around 155 the Brigantes, a British tribe in the North, revolted.