440 B.C. Ancient Greek Silver Tetradrachm Coin of Athens, Athenian Owl Design, NGC Choice XFA silver tetradrachm from Ancient Greece, from the Greek city state of Attica (Athens). This coin was produced between 440 404 B. C. and features the iconic Athenian Owl design, one of the most famous designs of ancient coins. The coin measures 24mm in diameter, about the size of a quarter. The obverse side of the coin features the portrait of Athena, the Greek goddess of wisdom, while the reverse features an owl, a bird associated with Athena. The