Augustus AE As. 6 BC. 

Obv: CAESAR AVGVST PONT MAX TRIBVNIC POT, bare head right
Rev: VOLVSVS VALER MESSAL IIIVIR AAAFF, around large SC. 

RIC I 441, rated scarce.

Used with permission of TimeLine Originals (www.time-lines.co.uk), June 2009