Marcus Aurelius (161-180), dupondius (Bronze, 25.2 mm, 11.99 g), Rome, 176-177.
Obv. M ANTONINVS AV[G GERM] SARM [TR P XXXI], laureate head of Aurelius to right.
Rev. IMP VIII COS III / FELICITA / TI AVG P [P], galley with four rowers, facing left; Neptune standing right below arch on stern.
Reference: RIC 1195; Cohen 191.