Watch List notes:

Gallienus. A.D. 253-268. AE antoninianus (21.63 mm, 2.86 g, 1 h). Gallienus Zoo series. Rome mint, struck A.D. 267-268. GALLIENVS AVG, radiate head right / NEPTVNO CONS AVG, Hippocamp swimming right, N below. Göbl 743b; RIC 245. aVF.