Cover from "PREVESA*11/12" to "CORFU", fr. with Lombardy-Venetia 2x2sld & 5sld and tied with "PREVESA" single-circle pmk, fr. on arrival with 20l. blue LHH stamp to pay the Greek fee and canc. "ΚΕΡΚΥΡΑ*29.ΝΟΕΜ.69". Disinfection slits. Rare. (Hellas 19b).