1930 2×30 cnt Lithuania Kaunas to Sweden Stockholm, Promotional Envelope, Letter Cover

This 1930 letter cover from Lithuania to Sweden features two 30 cnt blue stamps with national symbols of Lithuania, promoting local production with the message ``Buy only local products.`` Sent from Simon Sang, Ukmergės Street Nr 12, Kaunas, Lithuania, to Finspongs Metallverks Aktiebolag, Beridarebansgatan 17, Stockholm, Sweden. This envelope represents a piece of historical communication and a call to support local industry. A valuable addition for collectors of postal history and promotional memorabilia.