Prepaid entire letter fr. with 40l. dull mauve on blue canc. "ΣΥΡΟΣ*1.ΟΚΤ.61" (first day of issue). Cachet "Π.Ε.Δ." in red, via "ΑΘΗΝΑΙ*2.ΟΚΤ.61", arr. "ΝΑΥΠΛΙΟΝ". ONLY TWO KNOWN FIRST DAY COVER WITH 40l. VALUE Certificate O.Vlastos (1993). (Hellas 6b).