Watch List notes:

ARKADIA. Heraia. Circa 500-495 BC. Obol (Silver, 10 mm, 1.04 g, 3 h). Head of Hera to right, wearing stephane and with her cloak folded over the back of her head. Rev. ΕΡ in dotted square; all within incuse square. BCD Peloponnesos 1351 (this coin). BMC 6. SNG Copenhagen 233. Williams, Period II, 2 (O.4/R.6) (all struck from the same dies). Extremely rare. Toned. With uncleaned deposits as found, otherwise, good very fine.
From the "Collection sans Pareille" of Ancient Greek Fractions and from the BCD Collection, LHS 96, 8 May 2006, 1351, acquired from Spink's in London in January 1972, and described as coming from an old English collection.