Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Ecuador - 1929 (July 14), First Flight cover from Guayaquil - Valparaiso, franked by red Postal overprint on 2c green in vertical strip of three and uprated by semi-official Airplane overprint on 1c green (Sanabria #529), flight markings and arrival ds, F/VF, Scott #302