Watch List notes:

Attica, Aegina, (500-490/480 B.C.), silver obol, (0.83 g), obv. smoothed shell sea turtle without row of dots down dorsal spine, rev. incuse square, of skew design with five sunken triangular compartments, (S.1853, BMC 57-83, SNG Cop. 511). Toned, good very fine and scarce.

Ex Sotheby's Auctions, London, 15 July 1980, (lot 34 part).