Athens ... Οβολός Αθηνών 6ου αιώνα π.Χ. Coin no. 35. Casts. On strosis. Bulbous amphora. Incuse square divided diagonally. C 232, 90-17-37 ... Ca. 550-520 B.C ... (Cambridge 1924), p. 157, pl. IV:κ ... C.T. Seltman, Athens, Its History and Coinage ... Birth of Democracy (1993), fig. 18.7-15.
