Augustus Denarius. Colonia Patria mint, 18-17 BC. 

Obv: SPQR IMP CAESARI AVG COS XI TR POT VI, bare head left 
Rev: CIVIB ET SIGN MILIT A PART RECVPER, Arch of Augustus with facing quadriga 
 atop, figures on either side holding standard, aquila & bow. 

RSC 85.

Originally from an eBay auction by AncientAuctionHouse, $233 on 3/11/03.
Imported from dirtyoldcoins.com.