Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - France - Pioneer Flight covers - 1937 (July 19-20), registered air mail cover to Tanger via Casablanca, franked by PEXIP souvenir sheet with four other stamps and International Philatelic Exhibition label, arrival markings on the back, VF and scarce, Est. $400-$500, Scott #326, 329, C8