Gallienus. BI antoninianus. Siscia mint, struck AD 260-268. Sole reign. 

GALLIENVS AVG, radiate and cuirassed bust left, holding spear and shield, seen from the back.
PAX AVG, Pax walking left, holding olive branch and sceptre. 

RIC 576; Goebl 1397 unlisted bust type.

With permission of Eidmar auction 5, (on biddr.com), Nov. 2024.