Aemilian AR Antoninianus. 

IMP AEMILIANVS PIVS FEL AVG, radiate, draped & cuirassed bust right.
DIANAE VICTRI, Diana standing left, holding bow and arrow. 

RIC 2b, RSC 10; Sear5 9831.

From the CNG Online store, before 2007.
By permission of CNG, www.cngcoins.com.