Demetrius Poliorcetes. AE. 2.53 g, 15.47mm. Macedonia. 306-283 BC. 

Obv: Head of king right wearing Corinthian helmet
Rev: BA over prow right, bipennis (double-axe) to right, 
AR monogram below.

Lindgren II, 1303; SNG Cop. 1185

Used with permission of TimeLine Originals (www.time-lines.co.uk), January, 2010