Watch List notes:

Gallienus. A.D. 253-268. BI antoninianus (20.7 mm, 2.89 g, 7 h). Siscia mint, struck A.D. 266-267. GALLIENVS AVG, radiate head of Gallienus right / SALVS AVG, Salus standing facing, head left, holding scepter and feeding snake rising from altar to left, P in right field. Göbl 1462b; RIC 581; RSC 934. Fine, most silver remains, rough. Very Rare.

Very Rare, only one specimen at ACSearch