ATTICA, Athens. Circa 120's-140's AD. Æ Drachm (12.19 gm). Elaborately
  draped bust of Athena right, wearing Corinthian helmet with a high
  crest and decorated on the front with a small head, aegis on shoulder,
  long spear over left shoulder / AQH, owl seated high within an olive
  tree, a snake wrapped around the trunk of the tree; on the left stands
  Poseidon striding right and wielding a trident; on the right stands
  Athena walking left, raising her right hand and holding a shield on
  her left arm. 

Kroll 174; Svoronos pl. 89, 2; SNG Cop -; BMC 707; Imhoof Pausanias, pl. Z, Athens II,
  xi-xiv. 
Very Rare. 

Triton V Sale, 15 Jan 2002, lot 363.
 
 Lot sold for USD 2800.
Used by permission of Classical Numismatic Group, www.cngcoins.com.