Cover to Dusseldorf posted from "ΚΑΒΑΛΛΑ*25.VI.40" with exchange control cachet "ΥΠΗΡΑΣΙΑ ΠΡΟΣΤΑΣΙΑΣ ΕΘΝΙΚΟΥ ΝΟΜΙΣΜΑΤΟΣ-/ΚΑΒΑΛΛΑ" (type 6, Nr. 93) in violet colour and bilingual tape "CONTROLE DU CHANGE" (Nr.44).