Cover to Hamburg posted from "ΠΑΤΡΑΙ*30 ΑΥΓ. 40" with double-circle exchange control cachet "ΥΠΗΡΕΣΙΑ ΠΡΟΣΤΑΣΙΑΣ ΕΘΝΙΚΟΥ ΝΟΜΙΣΜΑΤΟΣ-ΠΑΤΡΩΝ-*-" (Type 4b, Nr.46) in violet colour and bilingual tape "CONTROLE DU CHANGE" (Nr.128). On arrival German censorship tape and cancellation.