Watch List notes:

Mysia, Kyzikos. 5th-4th centuries B.C EL fourree stater (22.34 mm, 13.79 g, 12 h). Satyr seated right on tunny / Quadripartite incuse square. Cf. Von Fritze I 171; Cf. SNG France 317; Cf. SNG von Aulock 1210. VF, plating uneven, core visible. Extremely Rare. 

A search of all auctions online did not find another example of an electrum stater fourree