triobol of The Serdaioi, 510-480 BC ca.

Obv. hd Dionysos, bearded and wreathed, SER
Rev. bunch of grapes

1.33 g Numismatica Ars Classica AG, Auction 13 8th October 1998 no. 164 Ex Antikenmuseum Basel und Sammlung Ludwig no. 164 Ex Leu sale 22, 1979, 6. Diobol according to the catalog of Numismatica Ars Classica AG, Auction 13.