Watch List notes:

Attica, Athens, Tetradrachm, after 449 BC; AR (g 17,01; mm 24; h 6); Head of Athena r., wearing crested attic helmet decorated with a olive wreath and palmette, Rv. AΘE, owl standing r. with closed wings; at l. olive twig and crescent. All within incuse square. SNG Copenhagen 31.
Cabinet tone. About extremely fine