ATTICA, Athens. Circa 454-404 BC. AR Tetradrachm (23mm, 17.03 g, 8h). Helmeted head of Athena right, with frontal eye / Owl standing right, head facing, closed tail feathers; olive spray and crescent to left; all within incuse square. Kroll 8; HGC 4, 1597. Iridescent toning, some horn silver on reverse. VF. With a Numismatic Fine Arts certificate of authenticity signed by David Sear.