The Tetartemorion, the smallest pre-Hellenistic silver-coin

This paper is only a brief, incomplete overview of small silver-coins of pre-Hellenistic date, just to attract attention to these smallest coins and not to give detailed results. The main features: The weight is about 0,2 g, and the size about 6 mm in diameter. The weight corresponds to the classical Greek weight-unit “Kerat”. Kerat is equivalent to Karat of today (0,200 g). This amount is the weight of a seed of the carob tree. Greek texts, mints emitting Tetartemoria, the equivalent of the coin, and a new series of Asia Minor are dealt with.