Augustus (27 BC - 14 AD) AR Denarius (Silver, 3.22g,19mm) Roma (Rome), ca 2-1 BC.
Obv. CAESAR AVGVSTVS DIVI F PATER PATRIAE, laureate head right.
Rev. AVGVSTI F COS DESIG PRINC IVVENT / C L CAESARES, Caius and Lucius Caesares with shields and spears standing facing, simpulum and lituus above, X below.
Ref: RIC I 212.