Bronze antoninianus, 19mm, 2.51gm, issued AD 267/268 Rome mint.
Obv: GALLIENVS AVG, Radiate head facing right.
Rev: NEPTVNO CONS AVG (N in ex.), Hippocampus swimming r.
References: Sear 10292, RIC 245, RSC 667.
Part of Gallienus' "zoo" series.
This coin fits the following collection focus(es): Gallienus' Zoo Series.