Sweden. Facit 183 cover , 25 öre blue vertical perf 9¾. A "Hedin cover". Letter sent from Stockholm to Dr Sven Hedin, 18.3.1929, to NANKING (China, mail route through Siberia), readdressed BEIJING, postal due applied. Arrival cds Nanking, transit cds Shanghai 30.3 and arrival cds Nanking 8.4. 1929.