ATTICA, Athens. Circa 500/490-485/0 BC. AR Tetradrachm (24.5mm, 17.21 g, 6h). Helmeted head of Athena right / Owl standing right, head facing; olive sprig to left; all within incuse square. Seltman Group M; Asyut Group IV; HGC 4, 1590. Struck with worn dies. VF.