Watch List notes:

Gallienus. AD 253-268. AR Antoninianus (21mm, 4.60 g, 12h). Siscia mint. 1st emission, AD 263-264. Radiate head left / Pax advancing left, holding palm frond and scepter. RIC V 576; MIR 36, 1397k; RSC 741c. Silvering, spots of light porosity, a few minor scratches. Near EF. Strong portrait.