Large official registered cover with "ΑΠΟΡΡΗΤΟΣ" indication franked with 25 Drs "Landscapes"+1 Dr.+1 Dr. charity cancelled "ΑΘΗΝΑΙ ΣΥΣΤΗΜΕΝΑ ΕΞΩΤΕΡΙΚΟΥ ?.ΙV.39" arrival "BERLIN 4.IV.39" with "ΠΕΝ" exchange control mark. Wax sealed. Very impressive (Hellas 522, 535, C82)