Volusian, AV aureus. AD 251. 23mm, 5.86 g. 

IMP CAE C VIB VOLVSIANO AVG, laureate, draped bust right.
AETERNITAS AVGG, Aeternitas standing left, holding 
phoenix on globe and holding the hem of her veil at her side.

RIC IV-3 154; Cohen 10; Sear 9728. 

With permission of Numismatica Ars Classica.