★ Apparently an unpublished denomination! ★

Mysia, Kyzikos. EL Hekte, 2.67 g 11.61 mm. 450-400 BC.
Obv: Herakles, naked, kneeling to left, holding a club over his right shoulder and holding a horn in his left, a tunny behind.
Rev: Quadripartite incuse square of mill-sail pattern
Ref: Von Fritze, Nomisma VII, 209, pl. VI, 21 var( stater); W. Greenwell, ‘The Electrum Coinage of Cyzicus’, NC 1887, 67, pl. III, 18 var(stater); Gulbenkian 630-631 var(stater) ; Boston 1528 var(stater); SNG France 342 var(stater).
VF/Very Rare!