Watch List notes:

ANCIENT COINS. Greek Coins. Other Properties. Attica, Athens (c.430-415 BC), Silver Tetradrachm, head of Athena right, wearing crested Attic helmet decorated with three olive-leaves and palmette, rev AΘE, owl standing right, head facing, olive-sprig and crescent behind, all within an incuse square, 16.67g, 9h (Kroll 8; SNG Cop 31).Slightly grainy surface in reverse field, lightly toned, nearly extremely fine.
ex Spink Auction, London, 6 October 2004, lot 116 (part)

Estimate: £550-650