Watch List notes:

ATTICA. Athens. Circa 545-525/15 BC. Obol (Silver, 7.5 mm, 0.61 g), from the so-called Wappenmünzen series. Gorgoneion facing. Rev. Somewhat irregular quadripartite incuse square. HGC 4, 1655. Seltman pl. IV, υ. SNG Soutzos 661. Svoronos pl. 1, 66-7. Weber 3377 (this coin). Sharply struck and nicely toned. Obverse very slightly off-center. About extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions and from the collection of Sir Hermann Weber, acquired in the Piraeus in 1885.