Silver tetradrachm, 29mm, 16.89gm, issued c. 286-281 BC Pella mint.
Obv: Diademed head of Alexander the Great wearing horn of Ammon.
Rev: BAΣIΛEΩΣ ΛYΣIMAXOY, Athena enthroned left holding Nike and resting on shield, spear behind.
References: see Sear 6814, HGC 1750p.
Deep V scratch on reverse centre.