Cover fr. with 2dr+3dr 1940 National Youth Organization airmail and regular canc. "ΗΡΑΚΛΕΙΟΝ*4.VIII.40", via "ΑΤΗΙΝΑΙ POSTE AERIENNE*5.VIII.40", arr. "ΒΡΟΝΤΑΔΕΣ*8.ΑΥΓ.1940". EON stamps were valid for postal use only for 3 days (3-5/8/1940). (Hellas A45+571+C81).