AE of Carthago Nova, Spain. C. Helvius Pollo, under Nero, for Tiberius
Size:  20x17mm  Weight:  5.29 grams
Obverse:  C HELVI POLL PR TI NERONE QV, bare head of Tiberius (?) right.
Reverse:  HIBERO PRAEF, sacrificial implements: simpulum, securis, aspergillum and apex.

RPC 166.

Thanks to Dane Kurth (www.wildwinds.com) for the identification of this coin