Augustus AR denarius, 11-10 BC. Lyons mint. 

AVGVSTVS DIVI F, bare head right. 
IMP XII beneath bull butting right. 

RIC 178a var; RSC 153.

RIC does not list a denarius with the bull butting right and the bare head obverse. 
RIC lists the type only as an aureus.

With permission of Gitbud & Naumann Auction 21, Lot 496, Sept. 2014.