Cover fr. with 2dr+3dr 1940 National Youth Organization airmail and regular canc. "ΗΡΑΚΛΕΙΟΝ*3.VIII.40", via "ΑΤΗΙΝΑΙ POSTE AERIENNE*3.VIII.40", arr. "ΒΡΟΝΤΑΔΕΣ*7.ΑΥΓ.1940". EON stamps were valid for postal use only for 3 days (3-5/8/1940). First day cover. (Hellas A45+571+C81).