http://agathe.gr/democracy/the_jury.html
The Jury The jurors for each trial were chosen from a large body of citizens available for jury duty for the period of one year. At the beginning of the year, each juror was given a bronze pinakion, a ... According to Aristotle, the juror on entering the court received a token, or symbolon (Athenian Constitution 65, 68, 69). After voting he turned in the token and was thus entitled to receive his fee of three obols (one-half a drachma).