Airmail cover franked with strip of five 1929 20c purple AIR issue and 1930 10c olive green & orange (SG 461 & 477) tied by GUAYAQUIL cds's dated FEB 9 1931. Flown on the Guayaquil - Port of Spain, Trinidad first flight with two line 'CORREO AEREO PANAGRA' marking in black and circular 'PRIMER DESPACHO AEREO CORREOS DE GUAYAQUIL - GUAYAQUIL - MATURIN (ECUADOR) - (VENEZUELA) 9 FEBRERO 1931' first flight cachet in black both on front and additional strike of the circular cachet on reverse. Addressed to MATURIN, VENEZUELA with large arrival mark on front. A great rarity of Ecuadorean aerophilately, only thirteen covers were carried. (Muller #78, rated 2000pts)