Athens, Attica, AE, AD 120-140. 7.61 g. 

Draped bust of Athena right, wearing Corinthian helmet.
AQHNIWN, Poseidon striding right, wielding trident, Athena walking left, holding shield on left arm, an owl sitting high in a serpent-entwined olive tree between them.

Kroll Agora 174; BMC 707.

Rare.

With permission of Fritz Rudolf Künker GmbH auction 124, Lot 7961, March 2007.

The image depicts the mythical argument between Athena and Poseidon about after whom the town should be named.