Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Vatican City - Pioneer Flights - 1931 (June 11), First Flight Rome - La Valetta, three-country franking cover of Vatican 20c violet and Italy Virgil 1L orange, appropriately cancelled, marked ''T'' upon arrival to Malta and Postage Due stamp of ½p green was applied, mostly VF and rare, 56 items were carried and only a few uprated upon arrival, Est. $300-$350, Scott #3