Watch List notes:

ATTICA, Athens. Circa 545-525/15 BC. AR Didrachm (20.5mm, 8.35 g). "Wappenmünzen" type. Scarab beetle / Quadripartite incuse square, divided diagonally. Seltman Group B, 20 var. (A14/P– [unlisted rev. die]) = Svoronos, Monnaies, pl. 1, 38 = Traité I 1112 = Weber 3420 = Photiades Pacha Collection (Hoffmann, 19 May 1890), lot 495; HGC 4, 1612 (illustrating Weber piece). Good VF, minor roughness. Extremely rare, apparently the second known, after the Weber/Photiades Pacha piece.