Herakles- PHARSALUS Athena Helmet Of Serpents Thessaly - Pharsalus Circa 480-440 B.C. AR Hemidrachm. 2.763 grams. Obverse: Head of Athena r., in close-fitting crested helmet ornamented with serpents. Reverse: Horse's head r., within incuse. SNG C 217. Good Very Fine. Herakles Numismatics, Inc.