27.3.1936. Hong Kong - Penang - Athens. First through Flight by Imperial Airways. Registered air cover with depart. canc. "HONG - KONG / AIR MAIL / 26 MR 36", violet boxed commemorative cachet, transit "PORT SAID / 24.AP.36", arr. "ΑΘΗΝΑΙ - ΑΦΙΞΙΣ ΑΕΡΟΠΟΡΙΚΩΣ / -5.IV.36". Airmail rate: $1.20 per 1/2 oz. EXTREMELY RARE - ONLY 4 COVERS FLOWN TO ATHENS. (Hellas 368).