Bidspirit auction | Worldwide Pioneer Flights - Portugal

Worldwide Pioneer Flights - Portugal - 1939 (May 26-28), First Trans-Atlantic Flight from Horta (Azores) to New York, registered cover franked by 1.50e-20e, air post set of six, confirmation markings on front and reverse, signed by pilot at top left, arrival ds on the back, VF, Est. $100-$150, Sc. #C1/9