Watch List notes:

ELIS, Olympia. Late 3rd century-191 BC. Æ Half Unit (17mm, 4.08 g, 10h). Laureate head of Apollo right / Zeus standing right, holding eagle on his outstretched arm, preparing to cast thunderbolt; monogram to lower left, Σ to lower right. BCD Olympia 294; HGC 5, 531. Dark green-brown patina. VF.

Ex Classical Numismatic Group 81 (20 May 2009), lot 2296; BCD Collection (not in LHS or Leu sales).