Gallienus, billon antoninianus. AD 265-266., Rome. 22.5 mm. 3.6 g. 

GALLIENVS AVG, radiate, draped bust right.
DIANAE CONS AVG, gazelle standing left. 

Mintmark XII. 

RIC V-1, Rome 181 (Sole reign).

With permission of Eidmar auction 3, lot 552 (on biddr.com), March 2024.