Amphipolis, Macedonia, AR obol, ca. 357-353 BC. 9mm, 0.43g. 

Obv: Head of Apollo right, wearing taenia. 
Rev: AMFI clockwise from top left in the corners of a 
linear square, dolphin right downwards within, all in  
incuse square. 

BMC 10; SNG ANS 83-4; 

courtesy of London Ancient Coins on deamoneta.com, Jun, 2012