Official cover from "ΥΠΟΠΡΟΞΕΝΕΙΟΝ ΤΗΣ ΕΛΛ. ΕΙΣ ΒΩΛΟΝ" mailed stampless, canc. "ΛΑΡΙΣΣΑ (ΤΟΥΡΚΙΑ)*13.ΜΑΙΟΣ.64", via "ΛΑΜΙΑ*13.ΜΑΙΟΣ.64", arr. "ΛΕΒΑΔΕΙΑ*14.ΜΑΙΟΣ.64". Very fine and scarce.