Registered cover canc. "ΡΕΘΥΜΝΟΝ*10.XII.1936" via "ΑΘΗΝΑΙ" and railroad "ΠΕΙΡΑΙΕΥΣ-ΛΑΡΙΣΣΑ*12.ΔΕΚ.36", arr. "ERFURT*15.12.36". Tape "ΕΛΕΓΧΟΣ ΣΥΝΑΛΛΑΓΜΑΤΟΣ", circular cachet "ΠΕΝ" and two wax seals "ΠΕΝ". Scarce.