Cover posted stampless from "ΣΜΥΡΝΑ (ΤΟΥΡΚΙΑ)*6.ΣΕΠΤ.68", via "ΑΘΗΝΑΙ*9.ΣΕΠΤ.68". On arrival, "ΠΑΤΡΑΙ*11.ΣΕΠΤ.68", taxed with 40l. rose-red on grey-lilac, SUPERB. Very few known on cover. Certificate O.Vlastos (1989). A great rarity. (Hellas 20IIb).