Watch List notes:

Attica, Islands off, Aegina (Aigina), (c.525-480 B.C.), silver stater (12.24 g), obv. sea turtle, head in profile, with thick collar and trace [row of dots] down its back, countermarked in centre of a seated dog, rev. small incuse square with mill-sail pattern, (S.1851, Meadows, Aegina, Group IIb, Milbank pl I, 11, Asyut Group IIb, No.466, HGC 6, 429, cf.SNG Cop.501, cf.Dewing 1657, cf.Rosen 216). Struck on an uneven flan, nearly very fine, extremely rare with dog countermark.

Ex Ponterio & Associates, Auction Sale 102, July 29, 1999, (lot 167).