Denomination : Silver tetradrachm.
Date : The traditionally accepted dating of this style is 449 to 413 BC, but I believe they were probably minted down to at least 407 BC, which is the most likely date for the emergency issue plated coins of this style.
Size : 21.5 x 24.7 mm. Weight : 17.19 grams.
Reference : Sear-2526.
Grade : gVF
Obverse : Head of Athena right.
Reverse : Owl standing right, with an olive sprig and crescent moon over its shoulder, with a AQE to the right.