Salonina, AE Antoninianus. Rome mint.

SALONINA AVG, Diademed, draped bust right on crescent.
VESTA, Vesta standing left, holding patera and sceptre.

No mintmark, no fieldmarks. 

Göbl 239b (not in RIC).
Note the letter N on the obverse, engraved as III - this
is a characteristic of the Rome mint.

WNC on ebay, Feb. 2003.