Kyzikos, Mysia, EL Stater. ca 450-330 BC. 18 mm, 16 g.

Diademed head of Aphrodite left, tunny fish below.
Quadripartite incuse square. 

Von Fritze 135; Boston MFA 1553; Gulbenkian 647; SNG France 287; SNG von Aulock 7316; Sear SG 3840; BMC 102. 

With permission of Gitbud & Naumann auction 27, Lot 191, Jan. 2015.