20 litrai (tetradrachm, "1.33 litra", "diobol") of Kamarina, 410 BC

Obv. head Athena wearing Attic helmet decorated with hippocamp
Rev. sprig of olive with two leaves and two berries; central dot. Letters KA

Westermark & Jenkins 206.5  1.17 g  P.R. Franke and M. Hirmer (1964, 1972) Die Griechische Münze (no. 153)
                                    London: PCG pl. 14.27 (from Catania hoard 1875)