Athena bust right in crested in Corinthian helmet. A round dot beside end of crest may represent a symbol. Border of dots 12 mm in diameter.
Reference
Lang, M. and M. Crosby (1964). The Athenian Agora X: Weights, Measures and Tokens. Princeton, New Jersey, The American School of Classical Studies at Athens. (https://zenon.dainst.org/Record/000211771)