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.
With permission of Roma Numismatics, May, 2010