C5 BC; see generally K.J.Dover in OCD(3) p.275, under Callias(2).
[1] Quoted at alpha 3750.
[2] An inscribed list (IGUR 216.1-6 = Callias test. 4 Kassel-Austin) of all the productions of a comic poet whose name has been lost, but who can be identified with fair certainty as Kallias, gives us two further titles, The Satyrs and The Iron [...]. It also supplies dates or approximate dates for several productions, all in the 440s and 430s.
[3] Alpha 3903 (but not the same Kallias: rather, an earlier one who was a relative of Aristeides; see Plutarch, Life of Aristeides 25). The confusion presumably arose because the fathers of both the poet and Aristeides had the name Lysimachos