Baesuri, Portugal, lead Triens, ca 50 BC, 4.70 g. 

BAES beneath stylized ship left. 
Ear of barley. 

Burgos 181; Gomes BAE 01.11 (this coin).
Very rare. 

Estimate: 600 CHF.

With permission of Numismatica Ars Classica, May 2012