Cherronesos, Thrace, AR hemidrachm: 

Obv: Forepart of lion right, head turned back.
Rev: Quadripartite square with AG monogram in one quarter 
and ear of barley (grain ear) inwards in the opposite quarter.

 Babelon Traite 1551; Paris 1560. 

Courtesy of the Bibliotheque Nationale, Paris, gallica.bnf.fr.