Gallienus (253-268) AE Antoninianus (Bronze, 4.08g, 21mm) Antioch. Obv: GALLIENVS AVG, Radiate, draped and cuirassed bust right. Rev: P M TR P XV P P / VIIC•, Neptune standing left, with foot on prow, holding trident. Ref: MIR 1638a; RIC 603.