Watch List notes:

Gallienus, 253-268. Antoninianus (Billon, 20 mm, 2.76 g, 12 h), Rome, 256-257. IMP C P LIC GALLIENVS P F AVG Radiate and cuirassed bust of Gallienus to right. Rev. PROVIDENTIA AVGG Providentia standing left, holding wand with her right hand and cornucopia with her left; at her feet to left, globe. Cohen 888. RIC 162. An impressively well struck example, nicely toned, with a clear and bold portrait of the emperor. Good extremely fine.