Early 5th cent? Form 59B dated 320-420 (LRP p.100); Cf. Agora V pl. 70 P 11186; Wohl notes a shallow grey ware bowl in a similar shape from Isthmia with early 5th cent date (1981 p. 122); also Corinth 18.2 no. 118 from Demeter, but this example much finer
