Watch List notes:

PTOLEMAIC KINGS OF EGYPT. Ptolemy II Philadelphos, 285-246 BC. Obol (Bronze, 23 mm, 9.50 g, 12 h), Alexandria, ca. 265-246. Head of the deified Alexander right, wearing elephant's skin headdress. Rev. ΒΑΣΙΛΕΩΣ ΠΤΟΛΕΜΑΙΟΥ Eagle with spread wings standing left on thunderbolt; between legs, Δ. CPE B219; Svoronos 439; SNG Copenhagen 158. CPE B219. SNG Copenhagen 158. Svoronos 439. Brown surfaces. Pitting. Very fine.
From an collection of a Swiss engineer formed from the 1880s until 1926.