Augustus Denarius. Uncertain Spanish mint, ca 19 BC. 

Obv: CAESAR AVGVSTVS, bare head right 
Rev: OB CIVES SERVATOS above and below shield inscribed SPQR CL V. 

RIC 79a; Sear 1626; RSC 215.
Courtesy of TimeLine Auctions (www.timelineauctions.com), Apr, 2013