1932 (Aug 4) Germany-Iceland-Canada-USA Transatlantic flight Wolfgang Von Gronau, cover with Canadian, USA, Philippines, Japan, Netherlands Indies, Ceylon and Indian adhesives, canceled at their prospective stops, including Unalaska, Alaska (Aug 29) pmk, v.f., signed by Von Gronau (Image)

Est.$1,500

1935 (21 Sep) Felix Vaitkus' Trans-Atlantic attempt, cover franked with US 6c orange and Lithuania special overprinted adhesive, also two additional stamps on back, tied by Kaunas (31 Oct) return trip to Chicago, numbered "90" and signed by Lt. Felix Vaitkus, with violet cachet, registry handstamp and other appropriate markings, fine-v.f. (Image)

Est.$750