Polskie Linie Lotnicze LOT , trading as LOT Polish Airlines, is the flag carrier of Poland. Based in Warsaw, LOT was established in 1929, making it one of the world's oldest airlines still in operation.
Year: 1930, Gummed. Günter Mair's catalogue no: - POL-B-1, rouletted H, strips of 4, embossing, dark blue or grey-blue(unlisted), 3***
Year: 1932, Gummed. Günter Mair's catalogue no: - POL-B-2, imperforated, sheets, thick cream paper, blue or dark blue or dark violet-blue or balck-blue(unlisted)/white, 3***
Year: approx.1938, Gummed. Günter Mair's catalogue no: - POL-B-4b, perforated 10 ¾ not 11, sheets, issued for customers in Palestine, blue or light grey-blue/white, 4****