Itanos, Crete, AR stater. Ca. 350-320 BC. 26 mm, 11.25 g. 

ITANION, Triton right with fish's tail, left hand raised and 
with his right brandishing a trident downwards.
Two sea monsters facing each other. 

Babelon II-3, 1415; Svoronos, Crète ancienne 20; Luynes 2356.