Augustus 27BC-14 AD Denarius

3.64g

Obv: Bust of Augustus right "CAESA[R AVGVSTVS DIVI F PA]TER PATRIAE"

Rev: Gaius and Lucius caesars standing facing, shields and spears between them, simpulum and Lituus turned inward above "[C.L. CAESARES AVGVS]TI F COS DESIG PRINC [IVVENT] 

RSC 43, RCV 1597

Gaius and Lucius were the sons of Agrippa and Augustus' daughter: Julia.  They were the heirs of Augustus but they died in 4 and 2 AD.