Watch List notes:

KYRENAICA. Kyrene. Circa 480-435 BC. Obol (Silver, 10 mm, 0.69 g, 11 h). Silphium plant with two pairs of leaves and five umbels. Rev. Bearded head of Zeus Ammon with a ram's horn over his ear; all within a dotted square within a shallow circular incuse. BMC 60. Rare. Well-struck, toned and very attractive. Nearly extremely fine.
From the "Collection sans Pareille" of Ancient Greek Fractions, ex Monnaies et Médailles 68, 15 April 1986, 324, ex Münzen und Medaillen FPL 395, November/December 1977, 90.