1st Period (June to Octomber 1941). Cover posted from "ΑΓΙΟΣ ΝΙΚΟΛΑΟΣ*7 IX 41", fr. with 25c. + 50c. in gutter pair + 50c. Symbolical of flight and canc. at Rhodes with "POSTA AEREAD RODI (EGEO)*13.9.41", arr. "ΑΘΗΝΑΙ*2 X 41". Censorship tape "VERIFICATO PER CENSURA" and censors mark "C4". (Hellas 44+46+A30).