Volusianus, AR Antoninianus, Rome mint. AD 251. 21mm, 3.46 gr. 

C VIBIO VOLVSIANO CAES, radiate, draped bust right.
ROMAE AETERNAE, Roma seated left on round shield, holding Victory and spear.

RIC 137; RSC 111; Sear -. 
Very rare.

With permission of cngcoins.com, July 2010.