Watch List notes:

ISLANDS off ATTICA, Aegina. Circa 350-338 BC. AR Stater (23mm, 11.64 g, 8h). Ni-, magistrate. Tortoise with segmented shell; A–I flanking / "Thin skew" incuse pattern; N-I in upper incuses, dolphin in lower left. Milbank p. 51, a; cf. HGC 6, 445 (drachm); SNG Copenhagen 526. Deeply struck on a broad flan, toned, areas of porosity. In NGC encapsulation 5872733-089, graded XF, Strike: 5/5, Surface: 2/5.

From the Robert W. Bartlett Bequest Sold for the Benefit of the American Numismatic Society. Ex Ponterio & Wyatt 8 (5 November 1982), lot 11.