Watch List notes:

Gallienus. A.D. 253-268. BI antoninianus (22.6 mm, 3.14 g, 6 h). Mediolanum mint, struck A.D. 260-268. IMP GALLIENVS P AVG, radiate head of Gallienus right / SALVS AVG, Asclepius standing facing, head left, leaning on serpent-entwined staff to right, P in exergue. Göbl 1288h; RIC 511; RSC 931. aVF, black patina, minor encrustations. Very Rare.

Very Rare, only one specimen at ACSearch