Bidspirit auction | Worldwide Pioneer Flights - United

Worldwide Pioneer Flights - United States - 1934 (June 27-July 2), Benjamin and Joseph Adamowicz Trans-Atlantic Flight from New York to Warsaw cover with pre-printed flight itinerary, franked by Washington 2c carmine, upon arrival to Warsaw uprated by Polish air post stamp, signed by both brother-pilots at top, Warsaw ''2.VII.34'' arrival ds, VF, Est. $200-$250, Sc. #634