Watch List notes:

ISLANDS OFF ATTICA, Aegina. Circa 480-457 BC. Obol (Silver, 9.5 mm, 1.00 g). Sea turtle with a T-shaped design of a collar and a line of five pellets down the back of its shell. Rev. Large square incuse with skew pattern. HGC 6, 450. Meadows Group IIIa. Toned. Good very fine.
From the "Collection sans Pareille" of Ancient Greek Fractions.