Commercial cover (flap missing) boxed "ΕΛΛ.ΤΑΧΥΔΡ.ΥΠΗΡΕΣΙΑ/ΕΝ/ΣΜΥΡΝΗ/ΑΤΕΛΕΣ" without any other indication, arr. "ΜΥΤΙΛΗΝΗ*16.ΜΑΙ.19". Handwritten in Greek "Μαιος 1919". First days after the Greek army landing on Smyrna. Rare.