http://agathe.gr/democracy/political_organization_of_attica.html
Political Organization of Attica: Demes and Tribal Representation Each tribe was divided into three parts, and each third (trittys) was from one of the three regions of Attica, plain, coast, or hills ... These rectangular clay plaques cut with one jagged edge were probably used in connection with allotment of a deme office. ... The tokens were cut before firing in the kiln and would have been reunited in the process of allotting the deme office. ... Athens, Agora Museum I 7030. Found inside the remains of the South Stoa, this inscription is a record of the metronomoi, the inspectors of weights and measures, of whom Aristotle wrote in the Athenian Constitution (51.2): "There are ten metronomoi appointed by lot, five for the city and five for Piraeus.
