Apollonia Pontika AR Tetradrachm. ca 350 BC. Magistrate Polyanax. 23mm, 16.97 g. 

Laureate head of Apollo right.
POLYANAX, upright anchor; A and crayfish to left and right.

Paunov 117 (this coin); Winterthur I. 1159; Bunbury 119.

With permission of Roma Numismatics auction 10, Lot 362, Sept 2015.