Watch List notes:

BOEOTIA. Koroneia. Circa 500-450 BC. Obol (Silver, 7.5 mm, 0.96 g). Boeotian shield. Rev. Ϙ in an incuse square. BCD Boiotia 167. BMC 1. SNG Copenhagen 182. Rare. Clear, lightly toned and very well-struck. Extremely fine.
From a European Collection, acquired prior to 2005.