Salonina, AE antoninianus. Rome mint. Sole reign of Gallienus. AD 260-268. 

SALONINA AVG, diademed, draped bust right on crescent.
VESTA, Vesta seated left, holding patera and transverse sceptre.

Mintmark: inverted Q. 

RIC V-1, 32 Rome var (mintmark); Dalheim hoard 12229. 

Courtesy of the Dalheim Hoard catalog.