Watch List notes:

ISLANDS off ATTICA, Aegina. Circa 525-475 BC. AR Stater (18.5mm, 12.17 g). Sea turtle with thin collar and row of dots down its back; two countermarks: A [above symbol] within incuse, struck over uncertain symbol in square incuse / Incuse square of "Union Jack" pattern with eight incuse segments. Meadows Group IIa; HGC 6, 428. Good Fine, toned.

From Group SGF.