Lithuania. Michel 311 on air mail cover, 1930 500th death anniversary of Vytautas. A nice "first air mail letter" sent from Kaunas 8.6.1930 to Linköping, franked with Mi 308, 309 and two copies of 311. Transit cds Berlin 8.6.1930 and Malmö 9.6.1930 on the back side of the cover.