Watch List notes:

MYSIA, Kyzikos. Circa 450-330 BC. EL Hekte – Sixth Stater (10mm, 2.66 g). Perseus crouching right, head left, holding harpa and head of Medusa; below, tunny right / Quadripartite incuse square. Von Fritze I 162; Boston MFA 1549 = Warren 1491; SNG BN 312. Slightly off center. VF.

From the Dr. Adrian Carr Collection. Ex Classical Numismatic Group Electronic Auction 411 (13 December 2017), lot 110.