Watch List notes:

MYSIA, Pergamon. Circa 280-260 BC. Æ Quarter Unit (11mm, 0.84 g, 12h). Helmeted head of Athena left / Confronted bulls' heads; spearhead above. Westermark, Bronze, Series I, 3; SNG BN 1550 var. (no symbol on rev.). Black surfaces. EF.

From the Jack A. Frazer Collection. Ex Classical Numismatic Group 37 (20 March 1996), lot 459.