Dating
266 CE (according to Göbl, MIR 36)
Obverse
GALLIENVS AVG, Bust of Gallienus, radiate, draped, cuirassed, right, viewed from rear
Reverse
P M TR P XV P P, Neptune, naked except for cloak over right leg, standing left, resting foot on prow, resting right arm on leg and holding vertical trident in left hand