Watch List notes:

ATTICA, Athens. Circa 454-404 BC. AR Tetradrachm (22mm, 17.06 g, 8h). Helmeted head of Athena right, with frontal eye / Owl standing right, head facing; olive sprig and crescent behind; all within incuse square. Kroll 8; SNG Copenhagen 31. VF, countermark on obverse, test cut and countermark on reverse.

Presumably the countermark found on this and the following lot (much resembling a fleur de lis) was intended as a bird in flight.